Java method of includes this folder to delete all contents under the specified folder

As follows:

//  Delete folder 
	private static void deleteDirectory(File file) {
		if (file.isFile()) {//  Indicates that the file is not a folder 
			file.delete();
		} else {
			//  You get the current path first 
			String[] childFilePaths = file.list();
			for (String childFilePath : childFilePaths) {
				File childFile = new File(file.getAbsolutePath() + "/" + childFilePath);
				deleteDirectory(childFile);
			}
			file.delete();
		}
	}

public static void main(String[] args) {
		File del_file = new File("D:/Test/ibs" + "/temp/");
		deleteDirectory(del_file);
	}