The weakCompareAndSetPlain() method of a AtomicReferenceArray class is used to atomically sets the value of the element at index i to newValue to newValue for AtomicReferenceArray if the current value is equal to expectedValue passed as parameter. This method updates the value at index i with memory semantics of setting as if the variable at index i was declared non-volatile and non-final.This method returns true if set a new value is successful.
Syntax:
public final boolean weakCompareAndSetPlain(int i,
E expectedValue,
E newValue)
Parameters: This method accepts i which is an index of AtomicReferenceArray to perform the operation, expectedValue which is the expected value and newValue which is the new value to set.
Return value: This method returns true if successful.
Below programs illustrate the weakCompareAndSetPlain() method:
Program 1:
// Java program to demonstrate AtomicReferenceArray// weakCompareAndSetPlain() method  import java.util.concurrent.atomic.AtomicReferenceArray;  public class GFG {      public static void main(String[] args)    {          // create an atomic reference object.        AtomicReferenceArray<Integer> ref            = new AtomicReferenceArray<Integer>(5);          // set some value        ref.set(0, 321);        ref.set(1, 123);        ref.set(2, 322);          // apply weakCompareAndSetPlain()        boolean result            = ref.weakCompareAndSetPlain(                0, 124,                234);          // print value        System.out.println("Setting new value"                           + " is successful = "                           + result);          System.out.println("Value of index 0 = "                           + ref.get(1));    }} |
Program 2:
// Java program to demonstrate AtomicReferenceArray// weakCompareAndSetPlain() method  import java.util.concurrent.atomic.AtomicReferenceArray;  public class GFG {      public static void main(String[] args)    {          // create an atomic reference object.c        AtomicReferenceArray<String> ref            = new AtomicReferenceArray<String>(5);          // set some value        ref.set(0, "C");        ref.set(1, "JAVA");        ref.set(2, "JS");        ref.set(3, "C++");        ref.set(4, "C");          // apply weakCompareAndSetVolatile()        boolean result            = ref.weakCompareAndSetVolatile(                4, "C",                "PYTHON");          // print value        System.out.println("Setting new value"                           + " is successful = "                           + result);          System.out.println("Value of index 4 = "                           + ref.get(4));    }} |
