Java AtomicInteger getAndDecrement() method

The getAndDecrement() method in AtomicInteger class gets the current value and decrement it by one. But it returns the value of atomicInteger before the subtraction.

Syntax

Return

It will return the currentValue first and decrement.

Example 1

import java.util.concurrent.atomic.AtomicInteger;
public class AtomicIntegerGetAndDecrementExp1 
{
    public static void main(String[] args) 
    {
        AtomicInteger number = new AtomicInteger(20);
        number.getAndDecrement();
        System.out.println("the updated number: "+ number);
    }
}

Test it Now

Output:

the updated number: 19

Example 2

import java.util.concurrent.atomic.AtomicInteger;
public class AtomicIntegerGetAndDecrementExp2 
{
    public static void main(String[] args) 
    {
        AtomicInteger number = new AtomicInteger();
        number.getAndDecrement();
        System.out.println("the updated number: "+ number);
    }
}

Test it Now

Output:

the updated number: -1

Example 3

import java.util.concurrent.atomic.AtomicInteger;
public class AtomicIntegerGetAndDecrementExp3  
{
    public static void main(String[] args) 
    {
        AtomicInteger number = new AtomicInteger(10);
        number.getAndDecrement();
        System.out.println("the updated number: "+ number);
    }
}

Test it Now

Output:

the updated number: 9

Example 4

import java.util.concurrent.atomic.AtomicInteger;
public class AtomicIntegerGetAndDecrementExp4 
{
    public static void main(String[] args) 
    {
        AtomicInteger number = new AtomicInteger(-1);
        number.getAndDecrement();
        System.out.println("the updated number: "+number);
    }
}

Test it Now

Output:

the updated number: -2

Example 5

import java.util.concurrent.atomic.AtomicInteger;
public class AtomicIntegerGetAndDecrementExp5 
{
    public static void main(String[] args) 
    {
        AtomicInteger number = new AtomicInteger(-10);
        number.getAndDecrement();
        System.out.println("the updated number: "+number);
    }
}

Test it Now

Output: