Question

How to check whether a string is empty or not in Java

Answer 1

package javaapplication1;

public class JavaApplication1 {
    
    public static void main(String[] args) {
  
        String s1 = "java php c++ PHP";
        String s2 = "";
        
        System.out.println(s1.isEmpty());
        System.out.println(s2.isEmpty());
                
        System.out.println(s1.length() == 0);
        System.out.println(s2.length() == 0);

        String s3 = null;
        System.out.println(s3.isEmpty());
    }    
}
   
/*
   
run:
   
false
true
false
true
Exception in thread "main" java.lang.NullPointerException
   
*/

 

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