Java String.isEmpty() check if string is empty or of 0 length, returns boolean value

string.isEmpty()

String.isEmpty() Checks if the string is empty or not.
Syntax

String1.isEmpty(String2)

Return value is boolean ( true or false )

Here are some examples with output.

String str1 = "";  
String str2 = "plus2net"; 

System.out.println(str1.isEmpty()); // true
System.out.println(str2.isEmpty()); // false

Checking a null string

It returns exception.

String str3=null;
System.out.println(str3.isEmpty());

Exception in thread "main" java.lang.NullPointerException

All String functions

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