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Java AtomicLong lazySet()用法及代碼示例


Java.util.concurrent.atomic.AtomicLong.lazySet()是Java中的內置方法,可更新先前的值並將其設置為在參數中傳遞的新值。

用法:

public final void lazySet(long newVal)

參數:該函數接受將要更新的單個必需參數newVal。


返回值:該函數不返回任何內容。

以下示例程序旨在說明上述方法:

示例1:

// Java program that demonstrates 
// the lazySet() function 
  
import java.util.concurrent.atomic.AtomicLong; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
  
        // Initially value as 0 
        AtomicLong val 
            = new AtomicLong(0); 
  
        System.out.println("Previous value: "
                           + val); 
  
        val.lazySet(10); 
  
        // Prints the updated value 
        System.out.println("Current value: "
                           + val); 
    } 
}
輸出:
Previous value: 0
Current value: 10

示例2:

// Java program that demonstrates 
// the lazySet() function 
  
import java.util.concurrent.atomic.AtomicLong; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
  
        // Initially value as 18 
        AtomicLong val = new AtomicLong(18); 
  
        System.out.println("Previous value: "
                           + val); 
  
        val.lazySet(200); 
  
        // Prints the updated value 
        System.out.println("Current value: "
                           + val); 
    } 
}
輸出:
Previous value: 18
Current value: 200

參考: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLong.html#lazySet–



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