通过JComboBox中的选定项目从阵列列表中删除对象

Question

我有一个学生注册系统，我遇到了麻烦。我试图通过从JComboBox中选择一个从ArrayList中删除对象。

public class Course { 

public List<Student> Students; 
public List<Module> Modules; 

    public Course() 
    { 
     Students = new ArrayList<Student>(); 
     Modules = new ArrayList<Module>(); 
    } 

public class Del_Student extends JFrame 
{ 

    private Course newCourse; 
    public Del_Student(Course aCourse) 
    { 
     newCourse = aCourse; 
     JButton btnDel = new JButton("Delete"); 
     JButton btnCancel = new JButton("Cancel"); 
     JComboBox studentsBox = new JComboBox(); 
     studentsBox.setPreferredSize(new Dimension(185,25)); 

    for(int i=0; i<newCourse.Students.size();i++) 
    { 
     String p = newCourse.Students.get(i).getFirstName(); 
     studentsBox.addItem(p); 
    } 

     btnDel.addActionListener 
    (
     new ActionListener() { 
      public void actionPerformed(ActionEvent e) { 
       newCourse.Students.remove(studentsBox.getSelectedItem()); 
      } 
     } 
    ); 

我已经加入从对象的字符串显示在JComboBox，所以我试图做的是选择该项目（由学生名字所示），然后删除选定的项目。

Answer 1

为了帮助其他人有类似的问题，我解决了这样的解决方案如下：

btnDel.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 
      for (int i = 0; i < newCourse.Students.size(); i++) { 
       if (newCourse.Students.get(i).getFirstName().equals(studentsBox.getSelectedItem() 
         .toString())) { 
        newCourse.Students.remove(i); 
        JOptionPane.showMessageDialog(null, "Student Deleted"); 
        studentsBox.removeAllItems(); 
        for (int t = 0; t < newCourse.Students.size(); t++) { 
         String p = newCourse.Students.get(t).getFirstName(); 
         studentsBox.addItem(p); 
        } 
       } 
      } 
     } 
    });