GUI编程

AWT

AWT抽象窗口工具

1.Frame窗口

Frame是一个顶级窗口

第一个Frame窗口

package com.deng.lesson01;

import javax.swing.border.TitledBorder;
import java.awt.*;

//GUI第一个界面
public class TestFrame {
    public static void main(String[] args) {

        //Frame,JDK,看源码
        Frame frame = new Frame("我的第一个Java图形界面窗口");

        //需要设置可见性 w h
        frame.setVisible(true);

        //设置窗口大小
        frame.setSize(400,400);

        //设置背景颜色 Color
        frame.setBackground(new Color(74, 208, 16));

        //弹出的初始位置
        frame.setLocation(200,200);

        //设置大小固定
        frame.setResizable(false);
    }
}

问题：无法关闭窗口：停止java程序

展示多个窗口

（回顾封装）

package com.deng.lesson01;

import java.awt.*;

public class TestFrame2 {
    public static void main(String[] args) {
        //展示多个窗口 new
        MyFrame myFrame1 = new MyFrame(100, 100, 200, 200, Color.BLACK);
        MyFrame myFrame2 = new MyFrame(300, 100, 200, 200, Color.BLUE);
        MyFrame myFrame3 = new MyFrame(100, 300, 200, 200, Color.GREEN);
        MyFrame myFrame4 = new MyFrame(300, 300, 200, 200, Color.MAGENTA);
    }
}
 class MyFrame extends Frame{
    static int id=0;//可能存在多个窗口，需要一个计数器

     public MyFrame(int x,int y,int w,int h,Color color){
         super("MyFrame"+(++id));
         setBackground(color);
         setBounds(x,y,w,h);
         setVisible(true);

     }
 }

2. Panel面板

Panel无法单独显示，必须添加到某个容器中。

解决无法关闭窗口的问题

package com.deng.lesson01;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.net.HttpRetryException;

public class TestPanel {
    public static void main(String[] args) {
        Frame frame = new Frame();
        Panel panel = new Panel();
        //设置布局
        frame.setLayout(null);

        //坐标
        frame.setBounds(300,300,500,500);
        frame.setBackground(new Color(19, 225, 12));

        //panel设置坐标，相对于frame
        panel.setBounds(50,50,400,400);
        panel.setBackground(new Color(232, 207, 51));

        //frame.add(panel)
        frame.add(panel);

        frame.setVisible(true);

        //监听事件，监听窗口关闭事件 System.exit(0)
        //适配器模式：
        frame.addWindowListener(new WindowAdapter() {
            //窗口点击关闭的时候需要做的事情
            @Override
            public void windowClosing(WindowEvent e) {
                //结束程序
                System.exit(0);
            }
        });

    }
}

3.布局管理器

流式布局

package com.deng.lesson01;

import java.awt.*;

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

        //组件-按钮
        Button button1 = new Button("button1");
        Button button2 = new Button("button2");
        Button button3 = new Button("button3");

        //设置为流式布局
        frame.setLayout(new FlowLayout());//默认居中
        //frame.setLayout(new FlowLayout(FlowLayout.LEFT));
        //frame.setLayout(new FlowLayout(FlowLayout.RIGHT));

        frame.setSize(200,200);

        //把按钮添加上去
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);

        frame.setVisible(true);
    }
}

东西南北中

package com.deng.lesson01;

import java.awt.*;

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

        Button east = new Button("East");
        Button west = new Button("West");
        Button south = new Button("South");
        Button north = new Button("North");
        Button center = new Button("Center");

        frame.add(east,BorderLayout.EAST);
        frame.add(west,BorderLayout.WEST);
        frame.add(south,BorderLayout.SOUTH);
        frame.add(north,BorderLayout.NORTH);
        frame.add(center,BorderLayout.CENTER);

        frame.setVisible(true);
    }
}

表格布局

package com.deng.lesson01;

import java.awt.*;

public class TestGridLayout {
    public static void main(String[] args) {


    Frame frame = new Frame("TestGridLayout");

    Button btn1 = new Button("btn1");
    Button btn2 = new Button("btn2");
    Button btn3 = new Button("btn3");
    Button btn4 = new Button("btn4");
    Button btn5 = new Button("btn5");
    Button btn6 = new Button("btn6");

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

    frame.add(btn1);
    frame.add(btn2);
    frame.add(btn3);
    frame.add(btn4);
    frame.add(btn5);
    frame.add(btn6);

    frame.pack();//Java函数！
    frame.setVisible(true);
    }
}

*简单的布局练习

分析:

1.Frame

2.4个面板Panel
border
左：button
中：面板 Grid
右：button

package com.deng.lesson01;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

public class ExDemo {
    public static void main(String[] args) {
        //总 Frame
        Frame frame = new Frame();
        frame.setSize(400,300);
        frame.setLocation(300,400);
        frame.setBackground(Color.BLACK);
        frame.setVisible(true);
        frame.setLayout(new GridLayout(2,1));

        //4个面板
        Panel p1 = new Panel(new BorderLayout());
        Panel p2 = new Panel(new GridLayout(2,1));
        Panel p3 = new Panel(new BorderLayout());
        Panel p4 = new Panel(new GridLayout(2,2));

        //上面
        p1.add(new Button("East-1"),BorderLayout.EAST);
        p1.add(new Button("West-1"),BorderLayout.WEST);
        p2.add(new Button("p2-btn-1"));
        p2.add(new Button("p2-btn-2"));
        p1.add(p2,BorderLayout.CENTER);

        //下面
        p3.add(new Button("East-2"),BorderLayout.EAST);
        p3.add(new Button("West-2"),BorderLayout.WEST);
        /*
        p4.add(new Button("p4-btn-1"));
        p4.add(new Button("p4-btn-2"));
        p4.add(new Button("p4-btn-3"));
        p4.add(new Button("p4-btn-4"));
         */
        //中间4个
        for (int i = 0; i < 4; i++) {
            p4.add(new Button("for-"+i));
        }
        p3.add(p4,BorderLayout.CENTER);

        frame.add(p1);
        frame.add(p3);
		
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}