W3Schools Tryit Editor

import java.io.File; 
import java.io.IOException;
public class CreateFile { 
 public static void main(String[] args) { 
 try { 
 File myObj = new File("filename.txt"); 
 if (myObj.createNewFile()) { 
 System.out.println("File created: " + myObj.getName()); 
 } else { 
 System.out.println("File already exists."); 
 } 
 } catch (IOException e) {
 System.out.println("An error occurred.");
 e.printStackTrace(); 
 } 
 } 
}