java - 如何在Java中缩进字符串和 double 结果？

Question

我的问题具体涉及结果的缩进。有些是字符串，有些是 double 。到目前为止，我有如下所示的 java 程序。我需要以下结果:

Name:             Yoda Luca
Income:           %5000.00
Interests:        Swimming, Hiking

我不想为每一行都写一个前缀。有没有更快的方法来格式化一次“String”和一次“Double”？

程序:

import java.util.Scanner;

public class forTesting {
    public static void main(String[] args) {
        String prefixName = "Name:"; 
        String prefixIncome = "Income";

        String Name;
        double Income;

        //create a Scanner that is connected to System.in
        Scanner input = new Scanner(System.in);

        System.out.print("Enter name:");
        Name = input.nextLine();

        System.out.print("Enter income for period: ");
        Income = input.nextDouble();

        String format = "%-40s%s%n"; 
        System.out.printf(format, prefixName,Name);
        System.out.printf(format, prefixIncome, Income);
    }
}

Answer 1

字符串格式采用格式并后跟 n 个参数。

是的。 %f 表示 double ，您可以一次性写入它们。

String format = "%-40s%s%n%-40s%f%n";
System.out.printf(format, prefixName,Name,prefixIncome, Income);

这给了你浮点 double 。获取标准格式

How to nicely format floating numbers to String without unnecessary decimal 0?