AtomicLongArray getAndSet() method in Java with Examples
Last Updated :
08 Feb, 2019
The Java.util.concurrent.atomic.AtomicLongArray.getAndSet() is an inbuilt method in Java that atomically sets a given value at any given position of the AtomicLongArray. The method takes the index value of the AtomicLongArray and the value to set as the parameters. It returns the value at the given index before setting the new value at that index. The function getAndSet() is similar to the set() function but the former returns value while the latter does not return any value.
Syntax:
public final long getAndSet(int i, long newValue)
Parameters: The function accepts two parameters:
i – The index where update is to be made.
newValue – The value to set at index i
Return value: The function returns the value at the given index before the update 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[] = { 11 , 12 , 13 , 14 , 15 };
AtomicLongArray arr = new AtomicLongArray(a);
System.out.println( "The array : " + arr);
int idx = 0 ;
long val = 100 ;
long prev = arr.getAndSet(idx, val);
System.out.println( "Value at index " + idx
+ " before the update is "
+ prev);
System.out.println( "The array after update : "
+ arr);
}
}
|
Output:
The array : [11, 12, 13, 14, 15]
Value at index 0 before the update is 11
The array after update : [100, 12, 13, 14, 15]
Program 2:
import java.util.concurrent.atomic.AtomicLongArray;
public class GFG {
public static void main(String args[])
{
long a[] = { 11 , 12 , 13 , 14 , 15 };
AtomicLongArray arr = new AtomicLongArray(a);
System.out.println( "The array : " + arr);
int idx = 3 ;
long val = 10 ;
long prev = arr.getAndSet(idx, val);
System.out.println( "Value at index " + idx
+ " before the update is "
+ prev);
System.out.println( "The array after update : "
+ arr);
}
}
|
Output:
The array : [11, 12, 13, 14, 15]
Value at index 3 before the update is 14
The array after update : [11, 12, 13, 10, 15]
Reference:
https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLongArray.html#getAndSet-int-long-
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