Java 中的 double 累加器 toString()方法，示例

原文:https://www . geesforgeks . org/double 累加器-tostring-method-in-Java-with-examples/

Java。double 累加器. toString() 是 java 中的一个内置方法，返回当前值的 String 表示形式。数值被显式转换为初始数据类型为双精度的字符串。

语法:

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:

程序 1:

// 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());
    }
}

Output:

DoubleAccumulator: 52.0
String representation: 52.0

程序 2:

// 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());
    }
}

Output:

DoubleAccumulator: 76.0
String representation: 76.0

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