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AtomicLongArray lazySet() method in Java with Examples

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  • Last Updated : 12 Feb, 2019
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The Java.util.concurrent.atomic.AtomicLongArray.lazySet() is an inbuilt method in Java that eventually sets a given value at any given index of an AtomicLongArray. The method takes the index value of the AtomicLongArray and the value to set as the parameters and updates the previous value without returning anything.

Syntax:

public final void lazySet(int i, long newValue)

Parameters: The function takes two parameters:

  • i which is the index value where the update is to made.
  • newValue which is the new value to update at the index.
  • Return Value: The function does not return any value.

    Below programs illustrate the above method:

    Program 1:




    // Java program that demonstrates
    // the lazySet() function
      
    import java.util.concurrent.atomic.AtomicLongArray;
      
    public class GFG {
        public static void main(String args[])
        {
            // Initializing an array
            long a[] = { 1, 2, 3, 4, 5 };
      
            // Initializing an AtomicLongArray
            // with array a
            AtomicLongArray arr
                = new AtomicLongArray(a);
      
            // Displaying the AtomicLongArray
            System.out.println("The array : " + arr);
      
            // Index where operation is performed
            int idx = 0;
      
            // The new value to update at idx
            long val = 10;
      
            // Updating the value at
            // idx applying lazySet
            arr.lazySet(idx, val);
      
            // Displaying the AtomicLongArray
            System.out.println("The array after"
                               + " update : "
                               + arr);
        }
    }

    Output:

    The array : [1, 2, 3, 4, 5]
    The array after update : [10, 2, 3, 4, 5]
    

    Program 2:




    // Java program that demonstrates
    // the lazySet() function
      
    import java.util.concurrent.atomic.AtomicLongArray;
      
    public class GFG {
        public static void main(String args[])
        {
            // Initializing an array
            long a[] = { 1, 2, 3, 4, 5 };
      
            // Initializing an AtomicLongArray
            // with array a
            AtomicLongArray arr
                = new AtomicLongArray(a);
      
            // Displaying the AtomicLongArray
            System.out.println("The array : " + arr);
      
            // Index where operation is performed
            int idx = 3;
      
            // The new value to update at idx
            long val = 100;
      
            // Updating the value at
            // idx applying lazySet
            arr.lazySet(idx, val);
      
            // Displaying the AtomicLongArray
            System.out.println("The array after "
                               + "update : "
                               + arr);
        }
    }

    Output:

    The array : [1, 2, 3, 4, 5]
    The array after update : [1, 2, 3, 100, 5]
    

    Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLongArray.html#lazySet-int-long-


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