Java中的 LongAccumulator toString() 方法及示例

Java.LongAccumulator.toString()是Java中的一个内置方法，它返回 LongAccumulator 实例当前值的字符串表示形式。

句法：

public String toString()

参数：此方法不接受任何参数。

返回值：此方法返回当前值的字符串表示形式。

下面的程序说明了上述方法：

程序 1 ：

// Program to demonstrate the toString() method
  
import java.lang.*;
import java.util.concurrent.atomic.LongAccumulator;
  
public class GFG {
    public static void main(String args[])
    {
        LongAccumulator num = new LongAccumulator(Long::sum, 0L);
  
        // accumulate operation on num
        num.accumulate(42);
        num.accumulate(10);
  
        num.get();
        // before toString the value is
        System.out.println(" the old value is: " + num);
        ;
  
        // toStrings current value
        num.toString();
  
        // Print after toString operation
        System.out.println(" the current value is: " + num);
    }
}

输出：

the old value is: 52
 the current value is: 52

方案二：

// program to demonstrate the toString() method
  
import java.lang.*;
import java.util.concurrent.atomic.LongAccumulator;
  
public class GFG {
    public static void main(String args[])
    {
        LongAccumulator num = new LongAccumulator(Long::sum, 0L);
  
        // accumulate operation on num
        num.accumulate(5);
        num.accumulate(10);
  
        num.get();
        // before toString the value is
        System.out.println(" the old value is: " + num);
  
        // toStrings current value
        num.toString();
  
        // Print after toString operation
        System.out.println(" the current value is: " + num);
    }
}

输出：

the old value is: 15
 the current value is: 15

参考：https: Java/util/concurrent/atomic/LongAccumulator.html#toString–