Java中的 DoubleAccumulator toString() 方法及示例

Java.DoubleAccumulator.toString()是Java中的一个内置方法，它返回当前值的字符串表示形式。数值被显式转换为初始数据类型为 double 的字符串。

句法：

public String toString()

参数：该方法不接受任何参数。

返回值：该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：

方案一：

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

输出：

DoubleAccumulator: 52.0
String representation: 52.0

方案二：

// Java program to demonstrate
// the toString() method
  
import java.lang.*;
import java.util.concurrent.atomic.DoubleAccumulator;
  
public class GFG {
    public static void main(String args[])
    {
        DoubleAccumulator num
            = new DoubleAccumulator(
                Double::sum, 0L);
  
        // accumulate operation on num
        num.accumulate(75);
        num.accumulate(1);
  
        // before toString the value is
        System.out.println("DoubleAccumulator: "
                           + num.get());
  
        // Print String representation
        System.out.println("String representation: "
                           + num.toString());
    }
}

输出：

DoubleAccumulator: 76.0
String representation: 76.0