Java，如何制作双列表

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这是我的代码。确实，我正在尝试学习java，但我不明白。

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;



public class Dual{
    public static JFrame myframe;
    public JPanel mypanel;
    private JList sourceList;

      private DefaultListModel sourceListModel;

      private JList destList;

      private DefaultListModel destListModel;

      private JButton addButton;

      private JButton removeButton;





    public Dual(){
        myframe = new JFrame("Dual List Box");
        myframe.setDefaultCloseOperation(myframe.EXIT_ON_CLOSE);
        myframe.setSize(400, 300);
        myframe.setResizable(false);
        mypanel = new JPanel();
        myframe.getContentPane().add(mypanel);
        initScreen();
        data();
    }

    private void initScreen() {
        mypanel.setLayout(new GridLayout(0, 2));
        sourceListModel = new DefaultListModel();
        sourceList = new JList(sourceListModel);

        addButton = new JButton(">>");
        addButton.addActionListener(new AddListener());
        removeButton = new JButton("<<");
        //removeButton.addActionListener(new RemoveListener());

        destListModel = new DefaultListModel();
        destList = new JList(destListModel);

        JPanel leftPanel = new JPanel(new BorderLayout());
        leftPanel.add(new JLabel("Available Elements:"), BorderLayout.NORTH);
        leftPanel.add(new JScrollPane(sourceList), BorderLayout.CENTER);
        leftPanel.add(addButton, BorderLayout.SOUTH);

        JPanel rightPanel = new JPanel(new BorderLayout());

        rightPanel.add(new JLabel("Selected Elements:"), BorderLayout.NORTH);
        rightPanel.add(new JScrollPane(destList), BorderLayout.CENTER);
        rightPanel.add(removeButton, BorderLayout.SOUTH);

        mypanel.add(leftPanel);
        mypanel.add(rightPanel);






      }
    private void data(){
        //sourceListModel.firstElement(request.getParameter("t" + i));
        sourceListModel.addElement("ABC");
        sourceListModel.addElement(new String[] { "One", "Two", "Three" });
        sourceListModel.addElement(new String[] { "Four", "Five", "Six" });
        sourceListModel.addElement(new String[] { "Seven", "Eight", "Nine" });
        sourceListModel.addElement(new String[] { "Ten", "Eleven", "Twelve" });
        sourceListModel.addElement(new String[] { "Thirteen", "Fourteen", "Fifteen" });
        sourceListModel.addElement(new String[] { "Sixteen", "Seventeen", "Eighteen" });
        sourceListModel.addElement(new String[] { "Nineteen", "Twenty", "Thirty" });
        sourceListModel.addElement("GREHDH");
        destListModel.addElement("DER");
        destListModel.addElement("GRTD");
        destListModel.addElement("HRET");
    }

    private void showSourceSelected() {
        Object selected[] = sourceList.getSelectedValues();
        System.out.println(selected.length); 
        for (int i = selected.length - 1; i >= 0; --i) {
            System.out.println(selected[i]);
          }
    }
    private void change1Selected() {
        Object selected[] = sourceList.getSelectedValues();
        int descout = destList.getModel().getSize();
        int c = 0;
        //System.out.println(selected.length); 
        for (int i = descout + 1; i <=selected.length+descout; i++) {
            destListModel.addElement(selected);

            destListModel.addElement("belble"+c);
            c++;
        }
        for (int i = selected.length - 1; i >= 0; --i) {
            sourceListModel.removeElement(selected[i]);

            //System.out.println(selected[i]);
          }
        //sourceList.getSelectionModel().clearSelection();

    }
        //myframe = new JFrame("Dual List Box ");
    //myframe.;
    private class AddListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
          Object selected[] = sourceList.getSelectedValues();
          showSourceSelected();
          change1Selected();
          //sourceList.getSelectionModel().clearSelection();
          //addDestinationElements(selected);
          //clearSourceSelected();
        }
      }
}

左按钮正在运行，正如我正在尝试创建双重列表的主题中一样。我不知道如何处理单个或多个选择。如何添加单个或多个元素。如何在没有有趣的 jlang.object 或字符串 blabla 的情况下在列表之间切换。

基于:Dual List Box示例:双重列表 « Swing « Java 教程

<小时/>

已编辑新代码

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;



public class Dual{
public static JFrame myframe;
public JPanel mypanel;
private JList sourceList;

  private DefaultListModel sourceListModel;

  private JList destList;

  private DefaultListModel destListModel;

  private JButton addButton;

  private JButton removeButton;

public Dual(){
    myframe = new JFrame("Dual List Box");
    myframe.setDefaultCloseOperation(myframe.EXIT_ON_CLOSE);
    myframe.setSize(400, 300);
    myframe.setResizable(false);
    mypanel = new JPanel();
    myframe.getContentPane().add(mypanel);
    initScreen();
    data();
}

private void initScreen() {
    mypanel.setLayout(new GridLayout(0, 2));
    sourceListModel = new DefaultListModel();
    sourceList = new JList(sourceListModel);

    addButton = new JButton(">>");
    addButton.addActionListener(new AddListener());
    removeButton = new JButton("<<");
    removeButton.addActionListener(new RemoveListener());

    destListModel = new DefaultListModel();
    destList = new JList(destListModel);

    ListSelectionListener listener1 = new ListSelectionListener(){

        JList b = null;

        @Override
        public void valueChanged(ListSelectionEvent e) {
            if (!e.getValueIsAdjusting()) {

            // TODO Auto-generated method stub
            //System.out.println(sourceselcted());
            if(e.getSource().equals(sourceList)){
            System.out.println("Source selcted");

                if(b!=e.getSource()){

                    destList.clearSelection();
                }
            }
            else{
            System.out.println("Destination selcted");
            if(b!=e.getSource()){

                sourceList.clearSelection();
            }
            }
            b=(JList) e.getSource();
            //System.out.println(b);
        }
        }

    };
    destList.addListSelectionListener(listener1);
    sourceList.addListSelectionListener(listener1);

    JPanel leftPanel = new JPanel(new BorderLayout());
    leftPanel.add(new JLabel("Available Elements:"), BorderLayout.NORTH);
    leftPanel.add(new JScrollPane(sourceList), BorderLayout.CENTER);
    leftPanel.add(addButton, BorderLayout.SOUTH);

    JPanel rightPanel = new JPanel(new BorderLayout());

    rightPanel.add(new JLabel("Selected Elements:"), BorderLayout.NORTH);
    rightPanel.add(new JScrollPane(destList), BorderLayout.CENTER);
    rightPanel.add(removeButton, BorderLayout.SOUTH);

    mypanel.add(leftPanel);
    mypanel.add(rightPanel);
    /* sourceList.addMouseListener(new MouseAdapter() {

        int lastSelectedIndex;

        public void mouseClicked(MouseEvent e) {

            int index = sourceList.locationToIndex(e.getPoint());

            if (index != -1 && index == lastSelectedIndex) {
                sourceList.clearSelection();
            }

            lastSelectedIndex = sourceList.getSelectedIndex();
        }
    });

    */




  }
private void data(){
    sourceListModel.addElement("ABC");
    sourceListModel.addElement("One" );
    sourceListModel.addElement("Four");
    sourceListModel.addElement("Seven");
    sourceListModel.addElement("Ten");
    sourceListModel.addElement("Thirteen");
    sourceListModel.addElement("Sixteen");
    sourceListModel.addElement("Nineteen");
    sourceListModel.addElement("GREHDH");
    destListModel.addElement("DER");
    destListModel.addElement("GRTD");
    destListModel.addElement("HRET");
}

private void showSourceSelected() {
    Object selectedcount[] = sourceList.getSelectedValues();
    System.out.println(selectedcount.length); 
    for (int i = selectedcount.length - 1; i >= 0; --i) {
        System.out.println(selectedcount[i]);
      }
}
private void showSourceSelected2() {
    Object selectedcount[] = destList.getSelectedValues();
    System.out.println(selectedcount.length); 
    for (int i = selectedcount.length - 1; i >= 0; --i) {
        System.out.println(selectedcount[i]);
      }
}
private int countlist(JList list){
    return list.getSelectedValues().length;

}
private void change1Selected() {
    Object selectedcount[] = sourceList.getSelectedValues();
    int count = selectedcount.length;
    Object selected = sourceList.getSelectedValue();
    //int descout = destList.getModel().getSize();
    //int c = 0;
    //System.out.println(selected.length); 
   // for (int i = descout + 1; i <=descout+1; i++) {
    for(int i=0;i<=count-1;i++){
        destListModel.addElement(selectedcount[i]);
        sourceListModel.removeElement(selectedcount[i]);

   // }
   // for (int i = selected.length - 1; i >= 0; --i) {

    }   
        //System.out.println(selected[i]);
      //}
    //sourceList.getSelectionModel().clearSelection();      
}
private void change2Selected() {
    Object selectedcount[] = destList.getSelectedValues();
    int count = selectedcount.length;
    Object selected = destList.getSelectedValue();
    //int descout = destList.getModel().getSize();
    //int c = 0;
    //System.out.println(selected.length); 
   // for (int i = descout + 1; i <=descout+1; i++) {
    for(int i=0;i<=count-1;i++){
        sourceListModel.addElement(selectedcount[i]);
        destListModel.removeElement(selectedcount[i]);

        //destListModel.addElement("belble"+c);
        //c++;
   // }
   // for (int i = selected.length - 1; i >= 0; --i) {

    }   
        //System.out.println(selected[i]);
      //}
    //sourceList.getSelectionModel().clearSelection();

}

private class AddListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      Object selected[] = sourceList.getSelectedValues();
      //showSourceSelected();

      System.out.println(countlist(sourceList));
      change1Selected();
      //sourceList.getSelectionModel().clearSelection();
      //addDestinationElements(selected);
      //clearSourceSelected();
    }
  }
private class RemoveListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      Object selected[] = destList.getSelectedValues();
      //showSourceSelected2();

      System.out.println(countlist(destList));
      change2Selected();
      //sourceList.getSelectionModel().clearSelection();
      //addDestinationElements(selected);
      //clearSourceSelected();
    }
  }
private boolean sourceselcted() {
    int sourcelength = sourceList.getSelectedValues().length;
    if(sourcelength>=1)return true;
  return false;    
}
private boolean destselcted() {
    int sourcelength = destList.getSelectedValues().length;
    if(sourcelength>=1)return true;
  return false;    
}

}

如何排序？有没有现成的功能，还是我必须自己制作？什么是带有 Object//String 声明的 Jlist？DefaultListModel、AbstractListModel、ListModel 之间有什么区别以及何时使用什么？如何使用子类型数据 ABC 制作 Jlist - 名称:xxx，ForVesrion:yyy，类型:zzz；并按 xxx 或 yyy 或 zzz 或任何其他 yyy/zzz/xxx 排序..??

Answer 1

How to switch betwen list without funny jlang.object

为什么要更改示例的代码？原始代码使用自定义ListModel。您的代码使用 DefaultListModel。

默认情况下，JList 仅对添加到 ListModel 的任何元素调用 toString() 方法。

sourceListModel.addElement(new String[] { "One", "Two", "Three" });

您的代码正在向 ListModel 添加一个数组。 Arry 的 toString() 方法将显示类似“jlang.object”的数据。

原始代码将 Array 的各个元素添加到 ListModel 中。

所以解决方案是不要将数组添加到 ListModel 中。相反，您需要单独添加每个元素:

sourceListModel.addElement("One");
sourceListModel.addElement("Two");
sourceListModel.addElement("Three");