Developer community
0 votes
113 views
asked by Expert (15k points) 15 23 32 | 113 views

1 Answer

0 votes
You can test if a reference variable is null by using the == operator. For instance.

public class MainClass {

  public static void main(String[] args) {
    String book = null;
   
    if (book == null) {
        book = new String();
    }
  }
}
answered by Geek (15.3k points) 18 43 68

Related questions

0 votes
1 answer
asked by john Guru (27.1k points) 35 52 112 | 41 views
0 votes
2 answers
asked by john Guru (27.1k points) 35 52 112 | 62 views
+1 vote
1 answer
0 votes
1 answer
asked by sara Guru (24.6k points) 31 57 92 | 16 views
0 votes
1 answer
asked by rajesh Guru (39.1k points) 10 23 38 | 178 views
Quick search syntax
tags tag:apple
author user:martin
title title:apple
content content:apple
exclude -tag:apple
force match +apple
views views:100
score score:10
answers answers:2
is accepted isaccepted:true
is closed isclosed:true

Categories


C Books Guide and List
C++ Books Guide and List
Best Java Books

3.8k questions

4k answers

117 comments

10.7k users

3,754 questions
4,046 answers
117 comments
10,709 users