我正在尝试使用JOptionPane创建一个下拉菜单。我希望它拥有的选项是数组列表的元素。所以我所做的是创建一个包含数组列表元素的数组。我希望用户能够看到元素作为选项。到目前为止我提供的代码。
我提供了人员，地址，学生和司机的课程。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;
}
}
这是学生班
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;
}
}
这是Driver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);
}
}
答案 0 :(得分：0)
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);
}