Question

How to check if string is empty in Java

Answer 1

public class MyClass {
    public static void main(String args[]) {
        String s = "";

        if (s.isEmpty()) {
            System.out.println("String is empty");
        }
    }
}
  
 
 
  
/*
run:
 
String is empty
 
*/

 

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Answer 2

public class MyClass {
    public static void main(String args[]) {
        String s = "";

        if (s == "") {
            System.out.println("String is empty");
        }
    }
}
  
 
 
  
/*
run:
 
String is empty
 
*/

 

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Answer 3

public class MyClass {
    public static void main(String args[]) {
        String s = "";

        if (s.length() == 0) {
            System.out.println("String is empty");
        }
    }
}
  
 
 
  
/*
run:
 
String is empty
 
*/

 

70+ SQL courses for beginners and professionals