Méthode d'utilisation de Java String isEmpty() et exemples

Java String (string) methods

The Java String isEmpty() method checks if the string is empty.

The syntax of the string isEmpty() method is:

string.isEmpty()

Here, string is an object of the String class.

isEmpty() parameter

• Without any parameters

isEmpty() return value

• If the string is empty (length is 0)Returns true

• If the string is not emptyReturns false

Example: Java string isEmpty()

class Main {
　　public static void main(String[] args) {
　　　　String str1　= "Java Programming";
　　　　String str2　= "";
　　　　System.out.println(str1.isEmpty());　//　false
　　　　System.out.println(str2.isEmpty());　//　true
　　}
}

Note:An uninitialized string is not an empty string. If isEmpty() is used on an uninitialized string, an error will be thrown.

Java String (string) methods