The Java.util.concurrent.atomic.AtomicLong.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 long.
Syntax:
public final long getAndSet(long 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.
Below programs illustrate the above method:
Program 1:
// Java program that demonstrates// the getAndSet() function import java.util.concurrent.atomic.AtomicLong; public class GFG { public static void main(String args[]) { // Initially value as 0 AtomicLong val = new AtomicLong(0); // Updates and sets long 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 program that demonstrates// the getAndSet() function import java.util.concurrent.atomic.AtomicLong; public class GFG { public static void main(String args[]) { // Initially value as 18 AtomicLong val = new AtomicLong(18); // Gets and updates long 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/AtomicLong.html#getAndSet–