标签：java GUI add frame import new public

• 适配器 实现监听器 只需要重写一个方法？ 继承抽象类？
• 什么是适配器模式
• 画笔 重写paint就行了 不用调用？
• 匿名内部类中的windowActivated方法为什么可以直接调setTitle()；
• p30 2. JDialog窗体 程序执行顺序
• 拉大一下才显示
• Timer定时器
• setFocusable

AWT

Frame

package com.GUI.frame;
//Frame窗口
import java.awt.*;

public class FrameDemo01 {
    public static void main(String[] args) {
        Frame frame = new Frame("第一个窗口");

        frame.setSize(400,400);

        frame.setLocation(200,200);

        frame.setBackground(Color.gray);

        frame.setVisible(true);

        frame.setResizable(false);
    }
}

package com.GUI.frame;
//Frame窗口 多个
import java.awt.*;

public class FrameDemo02 {
    public static void main(String[] args) {
        new MyFrame(200,200,300,300,Color.gray);
        new MyFrame(500,200,300,300,Color.lightGray);
        new MyFrame(200,500,300,300,Color.darkGray);
        new MyFrame(500,500,300,300,Color.pink);
    }
}
class MyFrame extends Frame{
    static int id = 0;
    public MyFrame(int x,int y,int width,int height,Color color){
        super("MyFrame"+(++id));
        setBounds(x,y,width,height);
        setVisible(true);
        setBackground(color);
        setResizable(false);
    }
}

Panel

package com.GUI.panel;
//Panel面板
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class PanelDemo01 {
    public static void main(String[] args) {
        Frame frame = new Frame("这是个窗口");
        Panel panel = new Panel();

        frame.setLayout(null);

        frame.setBounds(200,200,500,500);
        frame.setBackground(new Color(103, 103, 112));

        panel.setBounds(100,100,300,300);
        panel.setBackground(new Color(173, 173, 182));

        frame.add(panel);

        frame.setVisible(true);

        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

    }
}

布局管理器

package com.GUI.layout;
//布局管理器：FlowLayout布局
import java.awt.*;

public class FlowLayoutDemo01 {
    public static void main(String[] args) {
        Frame frame = new Frame("FlowLayout");

//        frame.setLayout(new FlowLayout());
        frame.setLayout(new FlowLayout(FlowLayout.LEFT));

        Button button1 = new Button("button1");
        Button button2 = new Button("button2");
        Button button3 = new Button("button3");

        frame.setLocation(200,200);
        frame.setSize(400,400);

        frame.add(button1);
        frame.add(button2);
        frame.add(button3);

        frame.setVisible(true);

    }
}

package com.GUI.layout;
//布局管理器：BorderLayout布局
import java.awt.*;

public class BorderLayoutDemo02 {
    public static void main(String[] args) {
        Frame frame = new Frame("BorderLayout");
        frame.setVisible(true);
        frame.setBounds(200,200,400,400);
        frame.setBackground(new Color(58, 96, 108));

        frame.setLayout(new BorderLayout());

        Button buttonEast = new Button("buttonEast");
        Button buttonWest = new Button("buttonWest");
        Button buttonSouth = new Button("buttonSouth");
        Button buttonNorth = new Button("buttonNorth");
        Button buttonCenter = new Button("buttonCenter");

        frame.add(buttonEast,BorderLayout.EAST);
        frame.add(buttonWest,BorderLayout.WEST);
        frame.add(buttonSouth,BorderLayout.SOUTH);
        frame.add(buttonNorth,BorderLayout.NORTH);
        frame.add(buttonCenter,BorderLayout.CENTER);

    }
}

package com.GUI.layout;
//布局管理器：GridLayout布局
import java.awt.*;

public class GridLayoutDemo03 {
    public static void main(String[] args) {
        Frame frame = new Frame("BorderLayout");
        frame.setVisible(true);

        frame.setBackground(new Color(58, 96, 108));

        frame.setLayout(new GridLayout(3,2));

        Button button1 = new Button("button1");
        Button button2 = new Button("button2");
        Button button3 = new Button("button3");
        Button button4 = new Button("button4");
        Button button5 = new Button("button5");
        Button button6 = new Button("button6");

        frame.add(button1);
        frame.add(button2);
        frame.add(button3);
        frame.add(button4);
        frame.add(button5);
        frame.add(button6);

        frame.pack();

    }
}

package com.GUI.layout;
//quiz 嵌套
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class Quiz04 {
    public static void main(String[] args) {
        Frame frame = new Frame("Quiz");
        frame.setVisible(true);
        frame.setBounds(200,200,500,300);
        frame.setLayout(new GridLayout(2,1));

        Panel panel1 = new Panel(new BorderLayout());
        Panel panel2 = new Panel(new GridLayout(2,1));
        Panel panel3 = new Panel(new BorderLayout());
        Panel panel4 = new Panel(new GridLayout(2,2));

        panel1.add(new Button("west-1"),BorderLayout.WEST);
        panel1.add(new Button("east-1"),BorderLayout.EAST);
        panel2.add(new Button("1-center-1"));
        panel2.add(new Button("1-center-2"));
        panel1.add(panel2, BorderLayout.CENTER);

        panel3.add(new Button("west-2"),BorderLayout.WEST);
        panel3.add(new Button("east-2"),BorderLayout.EAST);
        for (int i = 0; i < 4; i++) {
            panel4.add(new Button("2-center-"+(i+1)));
        }
        panel3.add(panel4,BorderLayout.CENTER);

        frame.add(panel1);
        frame.add(panel3);

        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

    }
}

事件监听 按钮、输入框

package com.GUI.action_listener;
//按钮  事件监听
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class ActionListenerDemo01 {
    public static void main(String[] args) {
        Frame frame = new Frame();
        frame.setSize(300,300);
        frame.setVisible(true);

        Button button = new Button("button");

        button.addActionListener(new MyActionListener());

        frame.add(button,BorderLayout.CENTER);

        windowClose(frame);

    }

    public static void windowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}
class MyActionListener implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("aaa");
    }
}

package com.GUI.action_listener;
//按钮事件监听
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class ActionListenerDemo02 {
    public static void main(String[] args) {
        Frame frame = new Frame();
        frame.setVisible(true);

        Button button1 = new Button("start");
        Button button2 = new Button("stop");

        button1.addActionListener(new MyActionListener2());
        button2.addActionListener(new MyActionListener2());

        button2.setActionCommand("stop now");

        frame.add(button1,BorderLayout.EAST);
        frame.add(button2,BorderLayout.CENTER);

        frame.pack();

        windowClose(frame);

    }

    public static void windowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

class MyActionListener2 implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println(e.getActionCommand());

    }
}

package com.GUI.action_listener;
//输入框事件监听
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TextDemo03 {
    public static void main(String[] args) {
        new MyFrame("TextDemo");
    }
}
class MyFrame extends Frame{
    public MyFrame(String title){
        super(title);
        setVisible(true);

        TextField textField = new TextField();
        textField.addActionListener(new MyActionListener3());
        textField.setEchoChar('*');

        add(textField);
        pack();
        windowClose(this);

    }
    public static void windowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}
class MyActionListener3 implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        TextField textField = (TextField) e.getSource();
        System.out.println(textField.getText());
        textField.setText("");
    }
}

package com.GUI.action_listener;
//加法计算器  组合
//在一个类里面持有另一个类的引用的用法是一种非常典型的用法
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class CalculatorDemo04 {
    public static void main(String[] args) {
        new Calculator().launchFrame();
    }
}
class Calculator extends Frame{
    TextField num1,num2,num3;
    public void launchFrame(){

        num1 = new TextField(10);
        num2 = new TextField(10);
        num3 = new TextField(20);

        Label label = new Label("+");

        Button button = new Button("=");

        button.addActionListener(new CalcActionListener(this));

        setLayout(new FlowLayout());
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        setVisible(true);
        pack();

    }
}
class CalcActionListener implements ActionListener{
    //在一个类中组合另外一个类
    Calculator calculator = null;

    public CalcActionListener(Calculator calculator) {
        this.calculator = calculator;
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        int n1 = Integer.parseInt(calculator.num1.getText());
        int n2 = Integer.parseInt(calculator.num2.getText());
        calculator.num3.setText("" + (n1 + n2));
        calculator.num1.setText("");
        calculator.num2.setText("");
    }
}

package com.GUI.action_listener;
//加法计算器  内部类
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class CalculatorDemo05 {
    public static void main(String[] args) {
        new Calculator2().launchFrame();
    }
}
class Calculator2 extends Frame {
    TextField num1,num2,num3;
    public void launchFrame(){

        num1 = new TextField(10);
        num2 = new TextField(10);
        num3 = new TextField(20);

        Label label = new Label("+");

        Button button = new Button("=");

        button.addActionListener(new CalcActionListener2());

        setLayout(new FlowLayout());
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        setVisible(true);
        pack();

    }

    private class CalcActionListener2 implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            int n1 = Integer.parseInt(num1.getText());
            int n2 = Integer.parseInt(num2.getText());
            num3.setText("" + (n1 + n2));
            num1.setText("");
            num2.setText("");
        }
    }

}

other listener

Paint

package com.GUI.other_listener;
//画笔 Paint
import java.awt.*;

public class PaintDemo01 {
    public static void main(String[] args) {
        new MyPaint().loadFrame();
    }
}
class MyPaint extends Frame{
    public void loadFrame() {
        setBounds(200,200,600,600);
        setVisible(true);
    }
    @Override
    public void paint(Graphics g) {
//        g.setColor(Color.GRAY);
        g.fillOval(50,50,200,200);
//        g.setColor(new Color(162, 117, 117));
        g.drawRect(150,250,200,200);
    }
}

listner

package com.GUI.other_listener;
//鼠标监听事件 模拟画图工具
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.Iterator;

public class MouseListenerDemo02 {
    public static void main(String[] args) {
        new MyFrame("画图").loadFrame();
    }
}
class MyFrame extends Frame{
    ArrayList<Point> points;
    public MyFrame(String title){
        super(title);
    }
    public void loadFrame(){
        points = new ArrayList<>();//注意 这里要new一个对象出来
        addMouseListener(new MyMouseListener());

        setBounds(300,300,600,600);
        setVisible(true);
    }
    @Override
    public void paint(Graphics g) {
        g.setColor(Color.PINK);
        Iterator iterator = points.iterator();
        while(iterator.hasNext()){
            Point point = (Point) iterator.next();
            g.fillOval(point.x,point.y,10,10);
        }
    }

    private class MyMouseListener extends MouseAdapter {
        @Override
        public void mouseClicked(MouseEvent e) {
            points.add( new Point(e.getX(),e.getY()) );
            MyFrame myFrame = (MyFrame) e.getSource();
            myFrame.repaint();
        }
    }
}

package com.GUI.other_listener;
//窗口监听事件
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class WindowListenerDome03 {
    public static void main(String[] args) {
        new WLFrame();
    }
}
class WLFrame extends Frame{
    public WLFrame(){
        setBounds(300,300,400,400);
        setVisible(true);

        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.out.println("windowClosing");
                System.exit(0);
            }
            @Override
            public void windowActivated(WindowEvent e) {
                WLFrame frame = (WLFrame)e.getSource();
                frame.setTitle("activated");
                System.out.println("windowActivated");
            }
        });
    }

}

package com.GUI.other_listener;
//键盘监听事件
import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

public class KeyListenerDemo04 {
    public static void main(String[] args) {
        new KLFrame();
    }
}
class KLFrame extends Frame{
    public KLFrame(){
        setBounds(300,300,500,500);
        setVisible(true);
        addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                int keyCode = e.getKeyCode();
                System.out.println(keyCode);
                if (keyCode == KeyEvent.VK_UP){
                    System.out.println("你按了上键");
                }
            }
        });

    }
}

Swing

JFrame

package com.GUI.swing.JFrame_01;
//JFrame窗口
import javax.swing.*;

public class JFrameDemo01 {
    public void init(){
        JFrame jFrame = new JFrame("这是一个JFrame窗口");
        jFrame.setVisible(true);
        jFrame.setBounds(300,300,500,500);

        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new JFrameDemo01().init();
    }
}

package com.GUI.swing.JFrame_01;
//用继承JFrame的方式编写的代码，并加入Container容器及JLabel标签
import javax.swing.*;
import java.awt.*;

public class JFrameDemo02 {
    public static void main(String[] args) {
        new MyJFrame().init();
    }
}
class MyJFrame extends JFrame{
    public void init(){
        setBounds(300,300,500,500);
        setVisible(true);
//        setResizable(false);

        JLabel jLabel = new JLabel("这是一个标签");
//        this.add(jLabel);
//        jLabel.setHorizontalAlignment(SwingConstants.CENTER);//两种都可以

        Container container = this.getContentPane();
        container.setBackground(Color.YELLOW);
        container.add(jLabel);
        jLabel.setHorizontalAlignment(SwingConstants.CENTER);

        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }
}

JDialog

package com.GUI.swing.JDialog_02;
//JDialog弹窗
//note JDialog(Frame owner, String title, boolean modal)
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class JDialogDemo01 extends JFrame {
    public JDialogDemo01(){
        this.setVisible(true);
        this.setBounds(300,300,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Container container = this.getContentPane();
        container.setLayout(null);//要有setBounds 不然显示不出

        JButton jButton = new JButton("点击弹出对话框");
        jButton.setBounds(150,225,200,50);

        container.add(jButton);
        jButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                new MyJDialog();
            }
        });

    }
    public static void main(String[] args) {
        new JDialogDemo01();
    }
}
class MyJDialog extends JDialog{
    public MyJDialog(){
        setBounds(400,400,300,300);
        setVisible(true);

        Container container = getContentPane();

        JLabel jLabel = new JLabel("你点击了按钮");
        container.add(jLabel);
        jLabel.setHorizontalAlignment(SwingConstants.CENTER);
    }
}

JLabel

package com.GUI.swing.JLabel_Icon_03;
//图标
import javax.swing.*;
import java.awt.*;

public class IconDemo01 extends JFrame implements Icon {
    public static void main(String[] args) {
        new IconDemo01().init();
    }

    private int width;
    private int height;
    public IconDemo01(){}

    public IconDemo01(int width, int height) {
        this.width = width;
        this.height = height;
    }
    public void init(){
        IconDemo01 iconDemo01 = new IconDemo01(20,20);
        Container container = getContentPane();
        JLabel jLabel = new JLabel("Icon",iconDemo01,SwingConstants.CENTER);
        container.add(jLabel);

        setBounds(300,300,500,500);
        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }
    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
        g.fillOval(x,y,width,height);
    }

    @Override
    public int getIconWidth() {
        return width;
    }

    @Override
    public int getIconHeight() {
        return height;
    }
}

package com.GUI.swing.JLabel_Icon_03;
//图片图标
import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class ImageIconDemo02 extends JFrame {
    public void init(){
        URL url = ImageIconDemo02.class.getResource("triangle.png");
        ImageIcon imageIcon = new ImageIcon(url);
        JLabel jLabel = new JLabel("ImageIcon",imageIcon,SwingConstants.CENTER);
//        jLabel.setIcon(imageIcon);
//        jLabel.setHorizontalAlignment(SwingConstants.CENTER);
//        jLabel.setOpaque(true);

        Container container = getContentPane();
        container.add(jLabel);

        setBounds(300,300,1000,1000);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setVisible(true);//要放在最后 不然组件显示不出来

    }
    public static void main(String[] args) {
        new ImageIconDemo02().init();
    }
}

JPanel

package com.GUI.swing.JPanel_04;
//JPanel
import javax.swing.*;
import java.awt.*;

public class JPanelDemo01 extends JFrame {
    public JPanelDemo01(){
        Container container = getContentPane();
        container.setLayout(new GridLayout(2,2,10,10));

        JPanel jPanel1 = new JPanel(new GridLayout(2,1));
        JPanel jPanel2 = new JPanel(new GridLayout(2,2));
        JPanel jPanel3 = new JPanel(new GridLayout(1,3));
        JPanel jPanel4 = new JPanel(new GridLayout(3,2));

        jPanel1.add(new JButton("1"));
        jPanel1.add(new JButton("1"));
        jPanel2.add(new JButton("2"));
        jPanel2.add(new JButton("2"));
        jPanel2.add(new JButton("2"));
        jPanel2.add(new JButton("2"));
        jPanel3.add(new JButton("3"));
        jPanel3.add(new JButton("3"));
        jPanel3.add(new JButton("3"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));

        container.add(jPanel1);
        container.add(jPanel2);
        container.add(jPanel3);
        container.add(jPanel4);

        setBounds(300,300,500,500);
        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }
    public static void main(String[] args) {
        new JPanelDemo01();
    }
}

package com.GUI.swing.JPanel_04;
//JScrollPane
import javax.swing.*;
import java.awt.*;

public class JScrollPaneDemo02 extends JFrame {
    public JScrollPaneDemo02(){
        Container container = getContentPane();

        JTextArea jTextArea = new JTextArea(20,50);
        jTextArea.setText("这是多行文字");

        JScrollPane jScrollPane = new JScrollPane(jTextArea);
        container.add(jScrollPane);

        setVisible(true);
        setBounds(300,300,500,500);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }
    public static void main(String[] args) {
        new JScrollPaneDemo02();
    }
}

JButton

package com.GUI.swing.JButton_05;
//JButton
import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo01 extends JFrame {
    public JButtonDemo01(){
        URL url = JButtonDemo01.class.getResource("triangle.png");
        Icon icon = new ImageIcon(url);
        JButton jButton = new JButton();
        jButton.setIcon(icon);
        jButton.setToolTipText("这是一个带图片的按钮");

        Container container = getContentPane();
        container.add(jButton);

        setVisible(true);
        setBounds(300,300,500,500);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new JButtonDemo01();
    }
}

package com.GUI.swing.JButton_05;
//JRadioButton
import javax.swing.*;
import java.awt.*;

public class JRadioButtonDemo02 extends JFrame {
    public JRadioButtonDemo02(){
        Container container = getContentPane();

        JRadioButton jRadioButton1 = new JRadioButton("jRadioButton1");
        JRadioButton jRadioButton2 = new JRadioButton("jRadioButton2");
        JRadioButton jRadioButton3 = new JRadioButton("jRadioButton3");
        ButtonGroup buttonGroup = new ButtonGroup();
        buttonGroup.add(jRadioButton1);
        buttonGroup.add(jRadioButton2);
        buttonGroup.add(jRadioButton3);

        container.add(jRadioButton1,BorderLayout.NORTH);
        container.add(jRadioButton2,BorderLayout.CENTER);
        container.add(jRadioButton3,BorderLayout.SOUTH);

        setVisible(true);
        setBounds(300,300,500,500);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new JRadioButtonDemo02();
    }
}

package com.GUI.swing.JButton_05;
//JCheckBox
import javax.swing.*;
import java.awt.*;

public class JCheckBoxDemo03 extends JFrame {
    public JCheckBoxDemo03(){
        Container container = getContentPane();

        JCheckBox jCheckBox1 = new JCheckBox("jCheckBox1");
        JCheckBox jCheckBox2 = new JCheckBox("jCheckBox2");

        container.add(jCheckBox1,BorderLayout.NORTH);
        container.add(jCheckBox2,BorderLayout.SOUTH);

        setVisible(true);
        setBounds(300,300,500,500);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new JCheckBoxDemo03();
    }
}

JComboBox

package com.GUI.swing.JComboBox_06;
//JComboBox   下拉列表
import javax.swing.*;
import java.awt.*;

public class JComboBoxDemo01 extends JFrame {
    public JComboBoxDemo01(){
        Container container = getContentPane();

        JComboBox status = new JComboBox();
        status.addItem("正在热映");
        status.addItem(null);
        status.addItem("即将上映");
        status.addItem("已下架");
        status.addItem("");

        container.add(status);

        setVisible(true);
        setBounds(300,300,500,500);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JComboBoxDemo01();
    }
}

package com.GUI.swing.JComboBox_06;
//JList   列表框
import javax.swing.*;
import java.awt.*;
import java.util.Vector;

public class JListDemo02 extends JFrame {
    public JListDemo02(){
        Container container = getContentPane();

//        String[] contents = {"1","2","3","4","5"};
        Vector<String> contents = new Vector<>();
        JList jList = new JList(contents);
        contents.add("11");
        contents.add("12");
        contents.add("13");

        container.add(jList);

        setVisible(true);
        setBounds(300,300,500,500);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JListDemo02();
    }
}

JTextComponent

package com.GUI.swing.JTextComponent_07;
//JTextField
import javax.swing.*;
import java.awt.*;

public class JTextFieldDemo01 extends JFrame {
    public JTextFieldDemo01(){
        Container container = getContentPane();

        JTextField jTextField1 = new JTextField("hello");
        JTextField jTextField2 = new JTextField("world",20);

        container.add(jTextField1, BorderLayout.NORTH);
        container.add(jTextField2, BorderLayout.SOUTH);

        setVisible(true);
        setBounds(300,300,500,500);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JTextFieldDemo01();
    }
}

package com.GUI.swing.JTextComponent_07;
//JPasswordField
import javax.swing.*;
import java.awt.*;

public class JPasswordFieldDome02 extends JFrame {
    public JPasswordFieldDome02(){
        Container container = getContentPane();

        JPasswordField jPasswordField = new JPasswordField();
        jPasswordField.setEchoChar('*');

        container.add(jPasswordField);

        setVisible(true);
        setBounds(300,300,500,500);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JPasswordFieldDome02();
    }
}

package com.GUI.swing.JTextComponent_07;
//JTextArea
import javax.swing.*;
import java.awt.*;

public class JTextAreaDemo03 extends JFrame {
    public JTextAreaDemo03(){
        Container container = getContentPane();

        JTextArea jTextArea = new JTextArea(20,50);

        JScrollPane jScrollPane = new JScrollPane(jTextArea);

        container.add(jScrollPane);

        setVisible(true);
        setBounds(300,300,500,500);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new JTextAreaDemo03();
    }
}

snake

package com.GUI.swing.snake;
//启动
import javax.swing.*;

public class StartGame {
    public static void main(String[] args) {
        JFrame jFrame = new JFrame();
        jFrame.setBounds(10,10,900,725);

        jFrame.add(new GamePanel());

        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        jFrame.setResizable(false);
        jFrame.setVisible(true);
    }
}

package com.GUI.swing.snake;
//面板
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Random;

public class GamePanel extends JPanel implements KeyListener, ActionListener {
    //蛇的数据结构
    int length;
    int[] snakeX = new int[600];
    int[] snakeY = new int[500];
    String fx;
    //食物坐标
    int foodx;
    int foody;
    Random random = new Random();

    //游戏当前的状态:开始，停止，失败
    boolean isStart = false;
    boolean isFail = false;

    //积分
    int score;

    //定时器  以ms为单位
    Timer timer = new Timer(100,this);

    public GamePanel(){
        init();

        this.setFocusable(true);//获得焦点事件
        this.addKeyListener(this);

        //定时器
        timer.start();
    }
    //初始化
    public void init(){
        length = 3;
        snakeX[0] = 100; snakeY[0] = 100;
        snakeX[1] = 75; snakeY[1] = 100;
        snakeX[2] = 50; snakeY[2] = 100;
        fx = "R";

        foodx = 25 + 25*random.nextInt(34);
        foody = 75 + 25*random.nextInt(24);

        score = 0;
    }

    //绘制面板
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        //界面
        this.setBackground(Color.WHITE);
        Data.header.paintIcon(this,g,25,11);
        g.fillRect(25,75,850,600);

        //积分
        g.setColor(Color.white);
        g.setFont(new Font("微软雅黑",Font.BOLD,18));
        g.drawString("长度 "+length,750,30);
        g.drawString("积分 "+score,750,55);

        //食物
        Data.food.paintIcon(this,g,foodx,foody);

        //画蛇
        if (fx.equals("R")){
            Data.right.paintIcon(this,g,snakeX[0],snakeY[0]);
        } else if (fx.equals("L")) {
            Data.left.paintIcon(this,g,snakeX[0],snakeY[0]);
        } else if (fx.equals("U")) {
            Data.up.paintIcon(this,g,snakeX[0],snakeY[0]);
        } else if (fx.equals("D")) {
            Data.down.paintIcon(this,g,snakeX[0],snakeY[0]);
        }
        for (int i = 1; i < length; i++) {
            Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
        }

        //开始的文字
        if (!isStart){
            g.setColor(Color.WHITE);
            g.setFont(new Font("微软雅黑",Font.BOLD,40));
            g.drawString("按下空格开始游戏",300,300);
        }
        //失败
        if (isFail){
            g.setColor(Color.red);
            g.setFont(new Font("微软雅黑",Font.BOLD,40));
            g.drawString("失败，按下空格重新开始",250,300);
        }

    }


    //键盘监听事件
    @Override
    public void keyPressed(KeyEvent e) {
        int keyCode = e.getKeyCode();

        //开始 暂停 失败
        if (keyCode == KeyEvent.VK_SPACE){
            if (!isFail){
                isStart = !isStart;
            }else {
                isFail = false;
                init();
            }
            repaint();
        }
        //蛇头的方向
        if (keyCode == KeyEvent.VK_RIGHT){
            fx = "R";
        }else if (keyCode == KeyEvent.VK_LEFT){
            fx = "L";
        }else if (keyCode == KeyEvent.VK_UP){
            fx = "U";
        }else if (keyCode == KeyEvent.VK_DOWN){
            fx = "D";
        }
    }
    @Override
    public void keyTyped(KeyEvent e) {

    }
    @Override
    public void keyReleased(KeyEvent e) {
    }

    //事件监听---需要通过固定事件来刷新，1s=10次
    @Override
    public void actionPerformed(ActionEvent e) {
        if (isStart && !isFail){
            //吃到食物
            if (snakeX[0] == foodx && snakeY[0] == foody){
                length++;
                score += 10;
                foodx = 25 + 25*random.nextInt(34);
                foody = 75 + 25*random.nextInt(24);
            }

            //灵魂：后面等于前面的！
            for (int i = length-1 ; i > 0 ; i--) {
                snakeX[i] = snakeX[i-1];
                snakeY[i] = snakeY[i-1];
            }
            //头的判断
            if (fx.equals("R")) {
                snakeX[0] = snakeX[0] + 25;
                if (snakeX[0] > 850) {snakeX[0] = 25;}

            } else if (fx.equals("L")) {
                snakeX[0] = snakeX[0] - 25;
                if (snakeX[0] < 25) {snakeX[0] = 850;}

            } else if (fx.equals("U")) {
                snakeY[0] = snakeY[0] - 25;
                if (snakeY[0] < 75) {snakeY[0] = 650;}

            } else if (fx.equals("D")) {
                snakeY[0] = snakeY[0] + 25;
                if (snakeY[0] > 650) {snakeY[0] = 75;}
            }

            //失败的情况
            for (int i = 1; i < length ; i++) {
                if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]){
                    isFail = true;
                }
            }

            repaint();
        }

        timer.start();
    }
}

package com.GUI.swing.snake;
//存放数据
import javax.swing.*;
import java.net.URL;

public class Data {
    public static URL headerURL = Data.class.getResource("statics\\header.png");
    public static ImageIcon header = new ImageIcon(headerURL);

    public static URL upURL = Data.class.getResource("statics\\up.png");
    public static URL downURL = Data.class.getResource("statics\\down.png");
    public static URL leftURL = Data.class.getResource("statics\\left.png");
    public static URL rightURL = Data.class.getResource("statics\\right.png");
    public static URL bodyURL = Data.class.getResource("statics\\body.png");
    public static URL foodURL = Data.class.getResource("statics\\food.png");

    public static ImageIcon up = new ImageIcon(upURL);
    public static ImageIcon down = new ImageIcon(downURL);
    public static ImageIcon left = new ImageIcon(leftURL);
    public static ImageIcon right = new ImageIcon(rightURL);
    public static ImageIcon body = new ImageIcon(bodyURL);
    public static ImageIcon food = new ImageIcon(foodURL);


}

1.定义数据
2.画上去
3.监听  键盘 事件

标签：java,GUI,add,frame,import,new,public
From： https://www.cnblogs.com/799rijiyuelei/p/16980905.html