The Java.util.concurrent.atomic.AtomicLong.decrementAndGet() is an inbuilt method in java that decreases the previous value by one and returns the value after updation which is of data-type long.
Syntax:
public final long decrementAndGet()
Parameters: The function does not accepts a single parameter.
Return value: The function returns the value after decrement operation is performed to the previous value.
Below programs illustrate the above method:
Program 1:
// Java program that demonstrates
// the decrementAndGet() 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);
System.out.println("Previous value: "
+ val);
// Decrement and get
long res
= val.decrementAndGet();
// Prints the updated value
System.out.println("Current value: "
+ res);
}
}
Output:
Previous value: 0 Current value: -1
Program 2:
// Java program that demonstrates
// the decrementAndGet() 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);
System.out.println("Previous value: "
+ val);
// Decrement and get new value
long res = val.decrementAndGet();
// Prints the updated value
System.out.println("Current value: "
+ res);
}
}
Output:
Previous value: 18 Current value: 17