當前位置: 首頁>>代碼示例 >>用法及示例精選 >>正文


Java AtomicInteger getAndAdd()用法及代碼示例


java.util.concurrent.atomic.AtomicInteger.getAndAdd()是Java中的一種內置方法,它將給定值添加到當前值,並在更新之前返回該值,該值數據類型是int。

用法:

public final int getAndAdd(int val)

參數:該函數接受單個強製參數val,該參數指定要添加到當前值的值。


返回值:該函數返回執行加法運算前的值。

以下程序演示了該函數:

示例1:

// Java program that demonstrates 
// the getAndAdd() function 
  
import java.util.concurrent.atomic.AtomicInteger; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
  
        // Initially value as 0 
        AtomicInteger val 
            = new AtomicInteger(0); 
  
        // Adds 7 and gets the previous value 
        int res 
            = val.getAndAdd(7); 
  
        // Prints the updated value 
        System.out.println("Previous value: "
                           + res); 
  
        System.out.println("Current value: "
                           + val); 
    } 
}
輸出:
Previous value: 0
Current value: 7

示例2:

// Java program that demonstrates 
// the getAndAdd() function 
  
import java.util.concurrent.atomic.AtomicInteger; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
  
        // Initially value as 18 
        AtomicInteger val 
            = new AtomicInteger(18); 
  
        // Prints the updated value 
        System.out.println("Previous value: "
                           + val); 
  
        // Adds 8 and gets the previous value 
        int res = val.getAndAdd(8); 
  
        // Prints the updated value 
        System.out.println("Previous value: "
                           + res); 
  
        System.out.println("Current value: "
                           + val); 
    } 
}
輸出:
Previous value: 18
Previous value: 18
Current value: 26

參考: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicInteger.html#getAndAdd-int-



相關用法


注:本文由純淨天空篩選整理自gopaldave大神的英文原創作品 AtomicInteger getAndAdd() method in Java with examples。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。