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 Saryada

Founder at Kode Java Org

I am a programmer, a runner, a recreational diver, currently live in the island of Bali, Indonesia. Mostly programming in Java, Spring Framework, Hibernate / JPA. You can support my works by donating here. Thank you 🙂.

Latest posts by Wayan Saryada (see all)

• How do I write JSON string using JSON-Java (org.json) library? - August 31, 2018
• How do I read JSON file using JSON-Java (org.json) library? - August 31, 2018
• Install IntelliJ IDEA Community Edition and Write Hello Kotlin Program - May 13, 2018