The ! operator is a logical compliment operator. The operator inverts the value of a boolean expression.

package org.kodejava.example.fundamental;

public class NegationOperator {
    public static void main(String[] args) {
        // negate the result of boolean expressions
        boolean negate = !(2 < 3);
        boolean value = !false;

        System.out.println("result: " + negate);
        System.out.println("value : " + value);
    }
}

Here is the result of the program:

result: false
value : true

• About
• Latest Posts

Wayan

Programmer, runner, recreational diver, live in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, Hibernate / JPA.

Latest posts by Wayan (see all)

• How to format LocalDate object using Jackson? - February 16, 2017
• How to pretty print JSON string using Jackson? - February 15, 2017
• How to convert java.time.LocalDate to java.util.Date? - February 14, 2017