小编Cor*_*seo的帖子

我试图在java中创建一个简单的基于文本的计算器我的第一个程序,EVER,我无法弄清楚如何将输入String转换为变量opOne.然后我会尝试numOne反对numTwo使用opOne作为运营商.代码如下:

import java.io.*;
import java.math.*;

public class ReadString {

   public static void main (String[] args) {


      System.out.print("Enter the first number: ");


      BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 
      int numOne = 0 ;
      int numTwo = 0 ;
      String opOne = null;

      while(true){
      try {
          numOne = Integer.valueOf(br.readLine());
          break;
      } catch (IOException error) {
         System.out.println("error; try again.");
         System.exit(1);
      }
      catch (NumberFormatException nfe) {
          System.out.println("error;try again.");

      }

      }

      System.out.print("Enter the …