AtomicLongArray decrementAndGet() method in Java with Examples
Last Updated :
05 Feb, 2019
The Java.util.concurrent.atomic.AtomicLongArray.decrementAndGet() is an inbuilt method in Java that atomically decrements by one the element at a given index. This method takes the index value and the value to be added as the parameters and returns the updated value at this index.
Syntax:
public final long decrementAndGet(int i)
Parameters: The function accepts a single parameter i which is the index where decrement by one operation is performed.
Return value: The function returns the updated value which is in long.
Below programs illustrate the above method:
Program 1:
import java.util.concurrent.atomic.AtomicLongArray;
public class GFG {
public static void main(String args[])
{
long a[] = { 1 , 2 , 3 , 4 , 5 };
AtomicLongArray arr = new AtomicLongArray(a);
System.out.println( "The array : " + arr);
int idx = 3 ;
arr.decrementAndGet(idx);
System.out.println( "The array after update : "
+ arr);
}
}
|
Output:
The array : [1, 2, 3, 4, 5]
The array after update : [1, 2, 3, 3, 5]
Program 2:
import java.util.concurrent.atomic.AtomicLongArray;
public class GFG {
public static void main(String args[])
{
long a[] = { 1 , 2 , 3 , 4 , 5 };
AtomicLongArray arr = new AtomicLongArray(a);
System.out.println( "The array : " + arr);
int idx = 0 ;
arr.decrementAndGet(idx);
System.out.println( "The array after update : "
+ arr);
}
}
|
Output:
The array : [1, 2, 3, 4, 5]
The array after update : [0, 2, 3, 4, 5]
Reference:
https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLongArray.html#decrementAndGet-int-
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