Deleting the file in Java program

import java.io.*;

public class DeleteFile{
    private static void deletefile(String file){
        File f1 = new File(file);
        boolean success = f1.delete();
        if (!success){
            System.out.println("Deletion failed.");
            System.exit(0);
        }else{
            System.out.println("File deleted.");
        }
    }
    public static void main(String[] args){
        switch(args.length){
            case 0: System.out.println("File has not mentioned.");
                    System.exit(0);
            case 1: deletefile(args[0]);
                    System.exit(0);
            default : System.out.println("Multiple files are not allow.");
                      System.exit(0);
        }
    }
}