isBlank() in Java 11

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Few new methods have been introduced in Java 11, String class. One of them is isBlank() method.

isBlank() method returns true if the string is empty or contains white space characters only. If the string contains multiple white space characters and no other characters then also true is returned.

Let us look at an example code :

public class Tech4Humans {

	public static void main(String[] args) {
		
		// Empty String
		String str1 = "";
		System.out.println(str1.isBlank());     //true
		
		
		// Single White space character
		String str2 = "\n";
		System.out.println(str2.isBlank());     //true
		
		
		// multiple White space characters
		String str3 = "\n\t";
		System.out.println(str3.isBlank());     //true
		
		
		String str5 = " ";
		System.out.println(str5.isBlank());     //true
		
		
		String str6 = " \n";
		System.out.println(str6.isBlank());     //true
		
		
		String str7 = "Tech4Humans";
		System.out.println(str7.isBlank());     //false

	}
}

Output

true
true
true
true
true
false

isEmpty() is another method in String class. By naming isEmpty and isBlank methods looks similar but there is a slight difference between them. Let us see the difference – isBlank() vs isEmpty().

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