Java AtomicLong getAndDecrement() Method

The getAndDecrement() method of Java AtomicLong class subtracts 1 from the AtomicLong value and returns its value before the subtraction. This method is equivalent to AtomicLong getAndAdd(-1) method.

Syntax

Returns

the previous value

Example 1

import java.util.concurrent.atomic.AtomicLong;
public class AtomicLongGetAndDecrementExample1 {
	public static void main (String [] args) {
		AtomicLong atomiclong = new AtomicLong();
		//Decrements the Initialized value
		Long result = atomiclong.getAndDecrement();
		//Prints the previous value
		System.out.println("Previous Value : " + result);
	}
}

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Output:

Previous Value : 0

Example 2

import java.util.concurrent.atomic.AtomicLong;
public class AtomicLongGetAndDecrementExample2 {
	public static void main (String [] args) {
		AtomicLong atomiclong = new AtomicLong(10);
		//Decrements the Initialized value
		Long result = atomiclong.getAndDecrement();
		//Prints the previous value
		System.out.println("Previous Value : " + result);
	}
}

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Output:

Previous Value : 10

Example 3

import java.util.concurrent.atomic.AtomicLong;
public class AtomicLongGetAndDecrementExample3 {
	public static void main (String [] args) {
		AtomicLong atomiclong = new AtomicLong(-20);
		//Decrements the Initialized value
		Long result = atomiclong.getAndDecrement();
		//Prints the previous value
		System.out.println("Previous Value : " + result);
	}
}

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Output: