选择 Java 中的 Format previousDouble()方法，示例

原文:https://www . geesforgeks . org/choice format-previous double-method-in-Java-with-examples/

Java . text . choice format类的 previousDouble() 方法用于获取仅小于传递的双精度值的双精度值。 语法:

public static final double previousDouble(double d)

参数:该方法接受双精度值 d 作为参数，返回之前的双精度值。 返回值:这个方法返回一个的双精度值刚好小于传递的双精度值。 以下是举例说明 previousDouble() 方法: 例 1:

Java 语言(一种计算机语言，尤用于创建网站)

// Java program to demonstrate
// previousDouble() method

import java.text.*;
import java.util.*;
import java.io.*;

public class GFG {
    public static void main(String[] argv)
    {
        // getting double value just
        // lesser than the passed value
        // using previousDouble() method
        double value
            = ChoiceFormat.previousDouble(22);

        // display the result
        System.out.print("Lesser double value: "
                         + value);
    }
}

Output: 

Lesser double value: 21.999999999999996

例 2:

Java 语言(一种计算机语言，尤用于创建网站)

// Java program to demonstrate
// previousDouble() method

import java.text.*;
import java.util.*;
import java.io.*;

public class GFG {
    public static void main(String[] argv)
    {
        // calling getValue() method
        getValue(1.23d);
        getValue(10d);
        getValue(-12d);
        getValue(1.2f);
        getValue(50);
    }

    // defining getValue() method
    public static void getValue(double doub)
    {

        // getting double value just
        // lesser than the passed value
        // using previousDouble() method
        double value
            = ChoiceFormat.previousDouble(doub);

        // display the result
        System.out.println("Just lesser than "
                           + doub + ": "
                           + value);
    }
}

Output: 

Just lesser than 1.23: 1.2299999999999998
Just lesser than 10.0: 9.999999999999998
Just lesser than -12.0: -12.000000000000002
Just lesser than 1.2000000476837158: 1.2000000476837156
Just lesser than 50.0: 49.99999999999999

参考:T2【https://docs . Oracle . com/javase/9/docs/API/Java/text/choice format . html # previous double-double-T4】

版权属于：月萌API www.moonapi.com，转载请注明出处

本文链接：https://moonapi.com/news/19002.html