JavaIO流一部分代码实现

创建文件代码

import java.io.File;
import java.io.IOException;

public class Main {

public static void main(String[] args) {
// write your code here
Main main=new Main();
main.create1();
main.create2();
main.create3();
}
public void create1(){
String filePath = "D:\\file1.txt";
File file = new File(filePath);
try {
file.createNewFile();
System.out.println("创建文件 1 成功");
} catch (IOException e) {
e.printStackTrace();
}
}
public void create2(){
File parentFile = new File("D:\\");
String fileNane = "file2.txt";

File file = new File(parentFile, fileNane);
try {
file.createNewFile();
System.out.println("文件 2 创建成功");
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public void create3(){
String parentPath = "d:\\";
String filePath = "file3.txt";
File file = new File(parentPath, filePath);
try {
file.createNewFile();
System.out.println("文件 3 创建成功");

} catch (IOException e) {
throw new RuntimeException(e);
}
}
}

实现截图：

获取文件信息：

package com.company;
import java.io.File;
import java.io.IOException;

public class Main {

public static void main(String[] args) {
// write your code here
Main main=new Main();
main.Info();
}
public void Info(){
File file = new File("D:\\file1.txt");
System.out.println("文件名称："+file.getName());
System.out.println("文件绝对路径："+file.getAbsolutePath());
System.out.println("文件父目录："+file.getParent());
System.out.println("文件大小(字节)："+file.length());

System.out.println("文件是否存在："+file.exists());
System.out.println("是否是文件："+file.isFile());
System.out.println("是否是目录："+file.isDirectory());
}
}

实现截图：