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If there are no pointers in Java, then why do we get NullPointerException?

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Pragya Keshap answered on February 4, 2023 Popularity 3/10 Helpfulness 1/10

answer If there are no pointers in Java, then why do we get NullPointerException?

If there are no pointers in Java, then why do we get NullPointerException?

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In Java, the pointer equivalent is Object reference.

When we use a . it points to object reference.

So JVM uses pointers but programmers only see object references.

In case an object reference points to null object, and we try to access a method or member variable on it, then we get NullPointerException.

import java.io.*;
 
class GFG
{
    public static void main (String[] args)
    {
        // Initializing String variable with null value
        String str = null;
        String message = (str == null) ? "" :
                          str.substring(0,5);
        System.out.println(message);
 
        // Initializing String variable with null value
        str = "Geeksforgeeks";
        message = (str == null) ? "" : str.substring(0,5);
        System.out.println(message);
    }
}

https://www.geeksforgeeks.org/null-pointer-exception-in-java/

Popularity 3/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: get java pointers

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Contributed on Feb 04 2023

Pragya Keshap

0 Answers Avg Quality 2/10

If there are no pointers in Java, then why do we get NullPointerException?

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If there are no pointers in Java, then why do we get NullPointerException?

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