java - Switch Statement输出数据到新的Var中

Question

我想知道如何将 switch 语句的结果放入新变量中。

这是我的代码，一旦 switch 语句找到正确的员工，我希望将此信息转到新变量。我该怎么做？

此外，如果我在“员工编号”字段中输入字符或字符串，如何让它返回并出错而不是导致应用程序崩溃？

package payRoll; // package Name

///////////////////////////////

import java.util.ArrayList;
import java.util.Scanner;

//////////////////// API Imports

public class Main {

  public static void main(String[] args) {
    Scanner keyboard = new Scanner ( System.in );

    /////////// Code

    String cacheEm = new String();  

    ArrayList<String[]> addresses = new ArrayList<String[]>();

    String[] EmNo  = new String[4]; {
        EmNo[0] = "Shaun Clark";
        EmNo[1] = "Ann Clark";
        EmNo[2] = "Darren Watters";
        EmNo[3] = "Daniel Brightman";

    addresses.add(EmNo);

    }       
    boolean repeat;
    do {
      repeat = false;

    System.out.print("Please Enter Employee number: ");     
    int employeeNum = keyboard.nextInt();   
    switch (employeeNum)
    {       
    case 1: employeeNum = 0;
    System.out.println("Employee Indexed as " + EmNo[0]);
    break;
    case 2: employeeNum = 1;
    System.out.println("Employee Indexed as " + EmNo[1]);
    break;
    case 3: employeeNum = 2;
    System.out.println("Employee Indexed as " + EmNo[2]);
    break;
    case 4: employeeNum = 3;
    System.out.println("Employee Indexed as " + EmNo[3]);
    break;
    default:            
        System.err.println("\n Employee Not found!! \n");
        repeat = true;          
        } 
    }       
    while(repeat);     

    keyboard.close();



    ////// output from switch needs to go into new variable for next function


  }// end class
}// end main 

Answer 1

您已经在 employeeNum 中得到了结果，只需检查它是否小于 4 就可以了。只需获取您应该执行的 EmNo[employeeNum] 而不是 switch 语句...

为了捕获输入中的错误，您应该使用 try-catch 语句捕获抛出的异常。