The Java String.isEmpty Method is one of the Java String Method which is used to check whether the User specified string is Empty or Not. If the length of the User specified string is zero then, String.isEmpty will return TRUE. In this article we will show you, How to find the Empty strings using Java string isEmpty method with example.
Java String isEmpty Method Syntax
The basic syntax of the String.isEmpty in Java Programming language is as shown below.
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public Boolean isEmpty() // It will return Boolean True or False as Output //In order to use in program String_Object.isEmpty() |
- String_Object: Please specify the valid String Object.
Java String isEmpty Method example
The Java String.isEmpty method is used to return True, if and only if the length of the user specified string is Zero otherwise, it will return False. In this Java program, We are going to find the same.
JAVA CODE
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//Java String.isEmpty Method example package StringFunctions; public class StringIsEmpty { public static void main(String[] args) { String str = "Tutorial GateWay"; String str1 =""; String str2 =" "; System.out.println("The Length of a String Str = " + str.length()); System.out.println("Is this String Str is Empty or Not? = " + str.isEmpty()); System.out.println("\nThe Length of a String Str1 = " + str1.length()); System.out.println("Is this String Str1 is Empty or Not? = " + str1.isEmpty()); System.out.println("\nThe Length of a String Str2 = " + str2.length()); System.out.println("Is this String Str2 is Empty or Not? = " + str2.isEmpty()); } } |
OUTPUT
ANALYSIS
First we declared the String variable and assigned some character set using following statement
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String str = "Tutorial GateWay"; |
From the following statements, first statement will find the length of the above specified string (which is 16). Second statement will call the public Boolean isEmpty () method to check whether the above specified string is empty or not. As we all know, length = 16 (which is not equal to zero) so the output will be False
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System.out.println("The Length of a String Str = " + str.length()); System.out.println("Is this String Str is Empty or Not? = " + str.isEmpty()); |
Here we declared the String variable and assigned an empty string using following statement
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String str1 =""; |
From the following System.out.println statement will call the public Boolean isEmpty () method to check whether the above specified string is empty or not. As we all know, length = 0 so the output will be True
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System.out.println("Is this String Str1 is Empty or Not? = " + str1.isEmpty()); |
Next we declared the String variable and assigned Empty space as value using following statement
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String str1 =" "; |
From the above screenshot you can observe that, it is returning False. It is because, length of the above specified string is 1, so isEmpty() method is returning False
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System.out.println("Is this String Str2 is Empty or Not? = " + str2.isEmpty()); |
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