Java AtomicInteger incrementAndGet() method

The incrementAndGet() method of Java AtomicInteger class increments the value by one and update the old value.

Syntax

Parameters

This will not take any arguments.

Return

It will return the atomicInteger value after incrementing.

Example 1

import java.util.concurrent.atomic.AtomicInteger;
public class AtomicIntegerIncrementAndGetExp1 
{
    public static void main(String[] args) 
    {
        AtomicInteger value = new AtomicInteger();
        value.incrementAndGet();
        System.out.println("the updated number: "+value);
    }
}

Test it Now

Output:

the updated number: 1

Example 2

import java.util.concurrent.atomic.AtomicInteger;
public class AtomicIntegerIncrementAndGetExp2 
{
    public static void main(String[] args) 
    {
        AtomicInteger value = new AtomicInteger(20);
        value.incrementAndGet();
        System.out.println("the updated number: "+value);
    }
}

Test it Now

Output:

the updated number: 21

Example 3

import java.util.concurrent.atomic.AtomicInteger;
public class AtomicIntegerIncrementAndGetExp3 
{
    public static void main(String[] args) 
    {
        AtomicInteger value = new AtomicInteger(-1);
        value.incrementAndGet();
        System.out.println("the updated number: "+value);
    }
}

Test it Now

Output:

the updated number: 0

Example 4

import java.util.concurrent.atomic.AtomicInteger;
public class AtomicIntegerIncrementAndGetExp4 
{
    public static void main(String[] args) 
    {
        AtomicInteger value = new AtomicInteger(2);
        value.incrementAndGet();
        System.out.println("the updated number: "+value);
    }
}

Test it Now

Output:

the updated number: 3

Example 5

import java.util.concurrent.atomic.AtomicInteger;
public class AtomicIntegerIncrementAndGetExp5 
{
    public static void main(String[] args) 
    {
        AtomicInteger value = new AtomicInteger(-100);
        value.incrementAndGet();
        System.out.println("the updated number: "+value);
    }
}

Test it Now

Output: