Java String isEmpty()

The java string isEmpty() method checks if this string is empty or not. It returns true, if length of string is 0 otherwise false. In other words, true is returned if string is empty otherwise it returns false.

The isEmpty() method of String class is included in java string since JDK 1.6.

Internal implementation

public boolean isEmpty() {
        return value.length == 0;
    }

Signature

The signature or syntax of string isEmpty() method is given below:

Returns

true if length is 0 otherwise false.

Since

1.6

Java String isEmpty() method example

public class IsEmptyExample{
public static void main(String args[]){
String s1="";
String s2="javatpoint";

System.out.println(s1.isEmpty());
System.out.println(s2.isEmpty());
}}

Test it Now

true
false

Java String isEmpty() Method Example 2

public class IsEmptyExample2 {
	public static void main(String[] args) {
		String s1="";  
		String s2="Javatpoint";  		  
		// Either length is zero or isEmpty is true
		if(s1.length()==0 || s1.isEmpty())
			System.out.println("String s1 is empty");
		else System.out.println("s1");		
		if(s2.length()==0 || s2.isEmpty())
			System.out.println("String s2 is empty");
		else System.out.println(s2);
	}
}

String s1 is empty
Javatpoint

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