Java Nullpointerexception Error Code Example

Snippet 1

  // A Java program to demonstrate that invoking a method 
// on null causes NullPointerException 
import java.io.*; 
  
class GFG 
{ 
    public static void main (String[] args) 
    { 
        // Initializing String variable with null value 
        String ptr = null; 
  
        // Checking if ptr.equals null or works fine. 
        try
        { 
            // This line of code throws NullPointerException 
            // because ptr is null 
            if (ptr.equals("gfg")) 
                System.out.print("Same"); 
            else 
                System.out.print("Not Same"); 
        } 
        catch(NullPointerException e) 
        { 
            System.out.print("NullPointerException Caught"); 
        } 
    } 
}