Write a java Program to raise NullPointerException

nullPointer.java

public class nullPointer {  
    public static void main(String[] args) {  
       Object ref = null;  
       ref.toString();   
    }  
 }  
  

Output:

  
LENOVO@DESKTOP-U7S0DTI MINGW64 /e/H-drive/Practicals/MCA/SEM III/JAVA/Practicals/assignment no1  
$ java null_pointer.java  
Exception in thread "main" java.lang.NullPointerException  
        at nullPointer.main(null_pointer.java:11)