Java String isEmpty Example
- /*
- Java String isEmpty Example.
- This Java String isEmpty example shows how to check whether the given
- string is empty or not using isEmpty method of Java String class.
- */
- public class JavaStringIsEmptyExample {
- public static void main(String args[]){
- String str1 = "";
- String str2 = null;
- String str3 = "Hello World";
- /*
- * To check whether the String is empty or not, use
- * boolean isEmpty() method of Java String class.
- *
- * This method returns true if and only if string.length() is 0.
- */
- System.out.println("Is String 1 empty? :" + str1.isEmpty());
- //this will throw NullPointerException since str2 is null
- //System.out.println("Is String 2 empty? :" + str2.isEmpty());
- System.out.println("Is String 3 empty? :" + str3.isEmpty());
- /*
- * Please note that isEmpty method was added in JDK 1.6 and it is not available
- * in previous versions.
- *
- * However, you can use
- * (string.length() == 0) instead of (string.isEmpty())
- * in previous JDK versions.
- */
- }
- }
- /*
- Output of Java String isEmpty would be
- Is String 1 empty? :true
- Is String 3 empty? :false
- */
