File class (add / delete)

1, establish （ increase ）

There are methods :

1,[createNewFile()] create a file

2,[mkdir()] Create folder

3,[mkdirs()] Create a folder in the folder ,（ Just creating File Write more when class ）

4,[delete()] Delete file

These can be used in the following ways, just change file. The back one is OK

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

public class filedemo1 {
    public static void main(String[] args) {
      File file =new File("D:\\abc.txt");
      boolean f1 =file.createNewFile();
    }
}

2, Use ctrl+alt+t use try/catch Method wrap the middle

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

public class filedemo1 {
    public static void main(String[] args) {
        try {
            File file =new File("D:\\abc.txt");
            boolean f1 =file.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Output

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

public class filedemo1 {
    public static void main(String[] args) {
        try {
            File file =new File("D:\\abc.txt");
            boolean f1 =file.createNewFile();
            System.out.println(f1?" Create success ":" Create failure ");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}