AtomicInteger getAndSet() method in Java with examples

AtomicInteger getAndSet() method in Java with examples

Last Updated : 29 Jan, 2019

The java.util.concurrent.atomic.AtomicInteger.getAndSet() is an inbuilt method in java that sets the given value to the value passed in the parameter and returns the value before updation which is of data-type int. Syntax:

public final int getAndSet(int val)

Parameters: The function accepts a single mandatory parameter val which specifies the value to be updated. Return value: The function returns the value before update operation is performed to the previous value. Program below demonstrates the function: Program 1:

Java

// Java program that demonstrates
// the getAndSet() function

import java.util.concurrent.atomic.AtomicInteger;

public class GFG {
    public static void main(String args[])
    {

        // Initially value as 0
        AtomicInteger val
            = new AtomicInteger(0);

        // Updates and sets
        int res
            = val.getAndSet(10);

        System.out.println("Previous value: "
                           + res);

        // Prints the updated value
        System.out.println("Current value: "
                           + val);
    }
}

Output:

Previous value: 0
Current value: 10

Program 2:

Java

// Java program that demonstrates
// the getAndSet() function

import java.util.concurrent.atomic.AtomicInteger;

public class GFG {
    public static void main(String args[])
    {

        // Initially value as 18
        AtomicInteger val
            = new AtomicInteger(18);

        // Gets and updates
        int res = val.getAndSet(12);

        System.out.println("Previous value: "
                           + res);
        // Prints the updated value
        System.out.println("Current value: "
                           + val);
    }
}

Output:

Previous value: 18
Current value: 12

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicInteger.html#getAndSet--

AtomicInteger getAndSet() method in Java with examples

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