JOptionPane下拉菜单Java

Question

我想使用JOptionPane做一个下拉菜单。我想要它的选项是数组列表的元素。所以我所做的就是创建一个包含数组列表元素的数组。我希望用户能够将元素看作选项。我提供了迄今为止的代码。

我为Person，Address，Student和Driver提供了我的课程。任何帮助将不胜感激。

package lab; 

import java.util.Scanner; 

public class Person { 
Scanner in = new Scanner(System.in); 
public String name; 
public String phone; 
public String email; 
public Address address; 

public Person(String name, String phone, String email, Address address){ 
    this.name = name; 
    this.phone = phone; 
    this.email = email; 
    this.address = address; 
} 
public Person(){} 

public String getName(){ 
    return name; 
} 
public String getPhone(){ 
    return phone; 
} 
public String getEmail(){ 
    return email; 
} 
public Address getAddress(){ 
    return address; 
} 
public String toString(){ 
    return name + "\n" + address + "\n" + phone + "\n" + email; 
} 
} 

这里是学生类

package lab; 

import java.util.ArrayList; 

public class Student extends Person{ 
private String studentID; 
private String status; 
private ArrayList<Course> courses = new ArrayList<Course>(); 
private Person person; 
private Student student; 

public Student(String id, String status, ArrayList<Course> courses, String name, String phone, String email, Address address){ 
    this.studentID = id; 
    this.status = status; 
    this.courses = courses; 
    this.name = name; 
    this.phone = phone; 
    this.email = email; 
    this.address = address; 
} 
public String getStudentID(){ 
    return studentID; 
} 
public String getStatus(){ 
    return status; 
} 
public ArrayList getCourses(){ 
    return courses; 
} 
public String toString(){ 
    return "Current Student: " + name + "\n" + studentID + "\n" + status + "\n" + address + "\n" + phone + "\n" + email; 
} 
} 

这里是Address类：

package lab; 

public class Address { 
private String number; 
private String street; 
private String city; 
private String state; 
private String zip; 
public Address(String number, String street, String city, String state, String zip){ 
    this.number = number; 
    this.street = street; 
    this.city = city; 
    this.state = state; 
    this.zip = zip; 
} 
public String toString(){ 
    return number + " " + street + "\n" + city + "," + " " + state + "\n" + zip; 
} 
} 

这里是驱动器类：

package lab; 

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

import javax.swing.JOptionPane; 

public class Driver { 
public static ArrayList<Person> students; 
public static ArrayList<Course> courses; 
public static ArrayList<FacultyMember> faculty; 
static Scanner in; 
public static int x; 


public Driver() 
{ 
    students = new ArrayList<Person>(); 
    courses = new ArrayList<Course>(); 
    faculty = new ArrayList<FacultyMember>(); 
} 
public static void input(){ 
    String response = JOptionPane.showInputDialog(null, "Please enter your name: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response2 = JOptionPane.showInputDialog(null, "Please enter your phone number: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response3 = JOptionPane.showInputDialog(null, "Please enter your email: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response4 = JOptionPane.showInputDialog(null, "Please enter your street number: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response5 = JOptionPane.showInputDialog(null, "Please enter your street name: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response6 = JOptionPane.showInputDialog(null, "Please enter your city: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response7 = JOptionPane.showInputDialog(null, "Please enter your state: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response8 = JOptionPane.showInputDialog(null, "Please enter your postal code: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response9 = JOptionPane.showInputDialog(null, "Please enter your student ID: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response10 = JOptionPane.showInputDialog(null, "Please enter your student status: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    Address anAddress = new Address(response4, response5, response6, response7, response8); 
    Student aStudent = new Student(response9, response10, courses, response, response2, response3, anAddress); 
    students.add(aStudent); 
    JOptionPane.showMessageDialog(null, students.get(students.size()-1).toString()); 
} 
public static void courseInput(){ 
    FacultyMember instructor = null; 
    in = new Scanner(System.in); 
    String response = JOptionPane.showInputDialog(null, "Please enter the course identifier: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response2 = JOptionPane.showInputDialog(null, "Please enter course title: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
    String response3 = JOptionPane.showInputDialog(null, "Please enter course term: ", "A Request", JOptionPane.PLAIN_MESSAGE); 
} 
public static void main(String[] args) { 
    students = new ArrayList<Person>(); 
    courses = new ArrayList<Course>(); 
    faculty = new ArrayList<FacultyMember>(); 
    Person[] choices = new Person[students.size()];//declare an array to use in drop down menu 
    Object[] options1 = {"Quit", "Students", "Faculty", "Courses"}; 
    Object[] options2 = {"Go Back", "Add a Student", "Expel a Student", "Show Students"}; 
    Object[] options3 = {"Go Back", "Add an Instructor", "Delete an Instructor", "Show Instructors"}; 
    Object[] options4 = {"Go Back", "Create a Course", "Remove a Course", "View Courses"}; 
    int n = 0; 
    do{//outer loop 
     n = JOptionPane.showOptionDialog(null, "Welcome to CSULA, please select an option:", "Main Menu", JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, options1, options1[0]); 
     if(n != 0){ 
      if(n == 1){//student loop 
       int o = JOptionPane.showOptionDialog(null, "What would you like to do?", "Students", JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, options2, options2[0]); 
        if(n != 0){ 
         if(o == 1){//add a student 
          input(); 
         } 
         else if(o == 2){//expel a student 
          students.toArray(choices); 
          JOptionPane.showMessageDialog(null, choices[0]); 
          String input = (String) JOptionPane.showInputDialog(null, "Choose a student: ", "Expel", JOptionPane.QUESTION_MESSAGE,null, choices,choices[0]); 



          } 
         } 
         else if(o == 3){//Show students - go to drop down menu 
          for(int i = 0; i<students.size(); i++){ 
           JOptionPane.showMessageDialog(null, students.get(i).toString()); 
          } 
         } 
        } 
      } 
      if(n == 2){//faculty loop 
       int o = JOptionPane.showOptionDialog(null, "What would you like to do?", "Instructors", JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, options3, options3[0]); 
       if(n != 0){ 
        if(o == 1){//add instructor 
         input(); 
        } 
        else if(o == 2){//fire instructor 
        } 
        else if(o == 3){//show instructor (via drop down menu) 
        } 
       } 
      } 
      if(n == 3){//course loop 
       int o = JOptionPane.showOptionDialog(null, "What would you like to do?", "Courses", JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, options4, options4[0]); 
       if(n != 0){ 
        if(o == 1){//add a course 
        } 
        else if(o == 2){//remove a course 
        } 
        else if(o == 3){//Show courses 
        } 
       } 
      } 
      else if(n == 0){//quit program 
      } 

    }while(n != 0); 
} 
} 

Answer 1

   public JButton createComponentDialogButton() { 
     Action a = new AbstractAction(getString("OptionPaneDemo.componentbutton")) { 
     public void actionPerformed(ActionEvent e) { 
    // In a ComponentDialog, you can show as many message components and 
    // as many options as you want: 

    // Messages 
      Object[]  message = new Object[4]; 
      message[0] = getString("OptionPaneDemo.componentmessage"); 
      message[1] = new JTextField(getString("OptionPaneDemo.componenttextfield")); 

      JComboBox cb = new JComboBox(); 
      cb.addItem(getString("OptionPaneDemo.component_cb1")); 
      cb.addItem(getString("OptionPaneDemo.component_cb2")); 
      cb.addItem(getString("OptionPaneDemo.component_cb3")); 
      message[2] = cb; 

      message[3] = getString("OptionPaneDemo.componentmessage2"); 

    // Options 
      String[] options = { 
     getString("OptionPaneDemo.component_op1"), 
     getString("OptionPaneDemo.component_op2"), 
     getString("OptionPaneDemo.component_op3"), 
     getString("OptionPaneDemo.component_op4"), 
     getString("OptionPaneDemo.component_op5") 
    }; 
      int result = JOptionPane.showOptionDialog( 
     getDemoPanel(),        // the parent that the dialog blocks 
     message,         // the dialog message array 
     getString("OptionPaneDemo.componenttitle"), // the title of the dialog window 
     JOptionPane.DEFAULT_OPTION,     // option type 
     JOptionPane.INFORMATION_MESSAGE,    
      // message type null,          
      // optional icon, use null to use the default icon options,         
      // options string array, will be made into buttons options[3]         


      // option that should be made into a default button 
    ); 
    switch(result) { 
     case 0: // yes 
     JOptionPane.showMessageDialog(getDemoPanel(), getString("OptionPaneDemo.component_r1")); 
     break; 
     case 1: // no 
     JOptionPane.showMessageDialog(getDemoPanel(), getString("OptionPaneDemo.component_r2")); 
     break; 
     case 2: // maybe 
     JOptionPane.showMessageDialog(getDemoPanel(), getString("OptionPaneDemo.component_r3")); 
     break; 
     case 3: // probably 
     JOptionPane.showMessageDialog(getDemoPanel(), getString("OptionPaneDemo.component_r4")); 
     break; 
     default: 
     break; 
    } 

    } 
}; 
return createButton(a); 
}