Java AtomicLong accumulateAndGet()用法及代码示例

Java.AtomicLong.accumulateAndGet()方法是一种内置方法，该方法通过对当前值和作为参数传递的值应用指定的操作来更新对象的当前值。它以long作为其参数以及LongBinaryOperator接口的对象，并将该对象中指定的操作应用于这些值。它返回更新的值。

用法:

public final long accumulateAndGet(long y, 
              LongBinaryOperator function)

参数：此方法接受长值y和LongBinaryOperator函数作为参数。它将给定函数应用于对象的当前值和值y。

返回值：该函数返回当前对象的更新值。

实例演示函数。

// Java programt to demonstrate 
// AtomicLong accumulateAndGet() method 
  
import java.util.concurrent.atomic.AtomicLong; 
import java.util.function.LongBinaryOperator; 
  
public class Demo { 
    public static void main(String[] args) 
    { 
        // AtomicLong initialized with a value of 555 
        AtomicLong atomicLong = new AtomicLong(555); 
  
        // Binary operator defined 
        // to calculate the product 
        LongBinaryOperator binaryOperator 
            = (x, y) -> x * y; 
  
        System.out.println("Initial Value is "
                           + atomicLong); 
  
        // Function called and the binary operator 
        // is passed as an argument 
        long value 
            = atomicLong 
                  .accumulateAndGet(555, binaryOperator); 
        System.out.println("Updated value is "
                           + value); 
    } 
}

输出：

Initial Value is 555
Updated value is 308025

参考： https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLong.html

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注：本文由纯净天空筛选整理自CharchitKapoor大神的英文原创作品 AtomicLong accumulateAndGet() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。