java文件夹的创建与文件信息的查询操作

创建：

第一种：import org.testng.annotations.Test;

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

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

    }
    @Test
    public void create1(){
        String pathname = "D://file1.txt";
        File file = new File(pathname);
        try {
            file.createNewFile();
            System.out.println("6");
        }catch (IOException e){
            throw new RuntimeException(e);
        }
    }
}

第二种：

import org.testng.annotations.Test;

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

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

    }

@Test

public void create2(){
    File parenFile = new File("D:\\");
    String fileNane = "file2.txt";
    File file = new File(parenFile,fileNane);
    try {
        file.createNewFile();
        System.out.println("6");
    }catch (IOException e){
        throw new RuntimeException(e);
    }
}
}

第三种：

import org.testng.annotations.Test;

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

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

    @Test

public void create3(){
    String parentPath = "d:\\";
    String filePath = "file3.txt";
    File file = new File(parentPath,filePath);
    try {
        file.createNewFile();
        System.out.println("6");
    }catch (IOException e){
        throw new RuntimeException(e);
    }
}


文件信息查询：

import org.testng.annotations.Test;

import java.io.File;

public class find {
    public static void main(String[] args){
    }
    @Test
    public void lnfo(){
        File file = new File("D:\\file 1.txt");
        System.out.println("文件名："+file.getName());
        System.out.println("文件绝对路径："+file.getAbsolutePath());
        System.out.println("文件父路径："+file.getParent());
        System.out.println("文件大小："+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());
    }
}

Scanner和Println：

import java.util.Scanner;

public class demo04 {
    public static void main(String[] args) {

        
        Scanner scan = new Scanner(Scanner.in);

        System.out.println("使用next方式接收：");

      
        String str = Scanner.nextLine();

        System.out.println("输出的内容为："+str);

       
        Scanner.close();

    }
}