如何声明子类别 java

Question

我想为此选项创建一个子类别。 我无法创作。 当我 select 1 时，我希望它显示几个子类别。

package Javaapplication7;

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

public class JavaApplication7 {

        static Scanner input = new Scanner (System.in);
        static ArrayList<Employee> emplList = new ArrayList<Employee>();

        public static void main(String[] args) {
            while(true) {

                System.out.println("1.Register employee");
                System.out.println("2View employee");
                System.out.println("3.Remove employee");
                System.out.println("4.Generate payslips");
                System.out.println("5.Exit");
                System.out.println("input option: ");
                int option = input.nextInt(); input.nextLine();



                switch(option){     
                    case 1:    
                        System.out.println("Register is selected ");
                        System.out.println("provide name: ");
                        String name = input.nextLine();
                        double salary= input.nextInt(); input.nextLine();
                        Employee emp = new employee(name,salary);
                        emplList.add(emp);
                        System.out.println("Regsitered:");
                }
            }
        }

}

所以当我选择 1 我想显示 1... , 2... , 3.... , 4....

Answer 1

但是，您的程序有很多拼写错误和语法错误，但至少您做了一些事情并在这里提供了代码，这很好。

这段代码不是最好的，但我认为它会帮助你:)

import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;

public class Test {
 static Scanner input = new Scanner (System.in);


public static void main(String[] args) throws IOException {



    int inputOption;
    do { 

        System.out.println("Choose Your Option :");
        System.out.println("1.Register employee");
        System.out.println("2. View employee");
        System.out.println("3.Remove employee");
        System.out.println("4.Generate payslips");
        System.out.println("5.Exit");
        System.out.println("input option: ");

       inputOption = input.nextInt(); 


       switch (inputOption) {
            case 1:


                System.out.println("Register is selected ");
                System.out.println("Do your Task"); 

                System.out.println("Choose Your Option :");
                System.out.println("1.Option 1");
                System.out.println("2.Option 2"); 
                System.out.println("5.Exit"); //keep 5 for exit
                System.out.println("input option: ");

                int inputSubOption = input.nextInt(); 

                switch (inputSubOption) {
                case 1:
                        System.out.println("1 Sub category Taks");
                        System.out.println("Press any number other then 5 to continue.....");
                        int exit = input.nextInt();
                        if( exit ==5 ) {System.exit(0); }
                    break;
                case 2:
                    System.out.println("2 Sub category Taks");
                break;

                default:
                    break;
                }

                break;

            default:
                break;
       }


    } while ( inputOption !=5 ) ;



}

}