java中以10为底到2、8、16的转换

问题描述

我在这个面向对象的课程中，但我只是不知道该怎么做.我知道基本的基础知识，但没有这样的.我被要求创建一个程序，将 # 的基数 10 转换为基数 2、基数 8 和基数 16.然后，在我们被要求将其从 2、8、16 转换回基数 10 之后.我收集了一些信息来自其他网站，实际上我最终编辑了一些.请帮忙！如果你们真的帮助和编辑自己并将其发送给我，我会更喜欢它，但如果这要求太多，请尝试指导我完成它，因为我不太了解 Java.到目前为止，我有:

I'm in this Object Oriented class, but I just don't know how to do this. I know basic fundamentals but nothing like this. I am asked to create a program that converts #'s base 10 to base 2, base 8,and base 16. Then, after we are asked to convert it back from 2,8,16 to base 10. I have gathered some information from other websites and I actually ended up editing a bit of it. Please help! I would prefer it if you guys actually helped and edited yourselves and sent it to me, but if that is too much to ask, please try to guide me through it as I do not know much of Java. So far I have:

import java.util.Scanner;

public class baseconverterr
{

public static void main(String[] args) {

      // Read the conversion choice from the user

      System.out.println("Choose 1 or 2 or 3:");

      System.out.println("1: conversion from base 10 to base 2 ");

      System.out.println("2: conversion from base 10 to base 8");

      System.out.println("3: conversion from base 10 to base 16");
      // do you want 1, 2 , or 3? you have your choice
      Scanner in = new Scanner(System.in);

      int choice = in.nextInt();

      String string = in.nextLine();

      // Read in the number to be converted and do the conversion

      String output= "";

      System.out.println("Please enter the number to be converted:");

      int input = in.nextInt();

      if (choice == 1)
      // if the user chooses choice #1, it will convert from base 10 to base 2
          output = Integer.toString(input, 2);

      else if (choice == 2)

          output = Integer.toString(input, 8);

    // if the user chooses choice #2, it will convert from base 10 to base of 8 
     else if (choice == 3)

          output = Integer.toString(input, 16);
   // if the user chooses choice #3, it will convert from base 10 to base 16
  else

      System.out.println("invalid entry");
      // everything else, it is invalid
      System.out.println("final output=" + output);
      // this prints the final output.

推荐答案

对于十进制 x(以 10 为底)可以分别用于二进制、八进制、十六进制转换

for a decimal x (base 10) you can use respectively for binary, octal, hex conversion

Integer.toString(x, 2),

Integer.toString(x, 8)

Integer.toString(x, 16).

然后将其转回十进制，分别由二进制、八进制、十六进制转换

then to convert it back to decimal, respectively from binary, octal, hex conversion

Integer.valueOf(binary_value, 2)

Integer.valueOf(octal_value, 8)

Integer.valueOf(hex_value, 16)

在您的代码中，更改以下内容:

in your code, change the following:

output = Integer.toString(input, 16) //replace 16 for hex, 8 for octal, 2 for binary 

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