How to delete a folder containing other folders in Java?

See English answers > delete directories recursively in Java 23

import java.io.*;
public class file03 {
    public static void main(String[] args) {
        File f1 = new File("C:/tempo1/tempo");
        f1.mkdirs();
        File f2 = new File("C:/test");
        if(!f2.exists()) {
            f2.mkdir();
        }
        f1 = new File("C:/tempo1/kempo");
        f1.mkdirs();
        f1 = new File("C:/tempo1");
        String[] t = {};
        if(f1.exists()) {
            t = f1.list();
            System.out.println(t.length + " files found");
        }
        for(int i = 0; i < t.length; i++) {
            System.out.println(t[i]);
        }
        try {
            Thread.sleep(3000);
        }
        catch(Exception e) {}
        f2.delete();
        f2 = new File("C:/tempo1/test.txt");
        try {
            f2.createNewFile();
        }
        catch(Exception e) {}
        try {
            Thread.sleep(7000);
        }
        catch(Exception e) {}
        File f3 = new File("C:/tempo1/renametesting.txt");
        f2.renameTo(f3);
        try {
            Thread.sleep(5000);
        }
        catch(Exception e) {}
        f3 = new File("C:/tempo1");
        f3.delete();
    }
}

I noticed that when the folder test is deleted, the folder tempo1 will not be deleted Is it because it contains other folders and files? If so, how can I delete it? I'm using the BlueJ ide

Solution

To delete a folder that contains files, no circular or recursive search is required You can directly use:

FileUtils.deleteDirectory(<File object of directory>);

This function will delete the folder and all files in it