jawtlist.java

正在学习Java的人或许能从中得到自己想要的东西

import java.awt.*;
import java.awt.event.*;
import java.util.*;
//swing classes
import javax.swing.text.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
import javax.swing.border.*;

//this is a simple adapter class to
//convert List awt methods to Swing methods

public class JawtList extends JScrollPane 
implements ListSelectionListener, awtList {
    private JList listWindow;
    private JListData listContents;
//-----------------------------------------
    public JawtList(int rows) {
        listContents = new JListData();
        listWindow = new JList(listContents);
        listWindow.setPrototypeCellValue("Abcdefg Hijkmnop");
        getViewport().add(listWindow);

    }
    public void addListSelectionListener(ListSelectionListener itl)   {
        listWindow.addListSelectionListener(itl);
    }
    public int getSelectedIndex()  {
        return listWindow.getSelectedIndex();
    }
    public void setMultipleMode(boolean mode) {
        if (mode) 
           listWindow.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        
        
        else
            listWindow.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    }
    public int getItemCount() {
        return listContents.getSize ();
    }
//-----------------------------------------
    public void add(String s) {
        listContents.addElement(s);
    }
//-----------------------------------------
    public void remove(String s) {
        listContents.removeElement(s);
    }
//-----------------------------------------
    public void setSelectedIndex(int i) {
        listWindow.setSelectedIndex(i);
        listWindow.ensureIndexIsVisible(i);
    }
//-----------------------------------------
    public String[] getSelectedItems() {
        Object[] obj = listWindow.getSelectedValues();
        String[] s = new String[obj.length];
        for (int i =0; i<obj.length; i++)
            s[i] = obj[i].toString();
        return s;
    }
    public void deselect(int i) {
        listWindow.clearSelection ();
    }
//-----------------------------------------
    public void valueChanged(ListSelectionEvent e) {
    }

}
//  =========================================
class JListData extends AbstractListModel {
    private Vector data;
//-----------------------------------------
    public JListData() {
        data = new Vector();
    }
//-----------------------------------------
    public int getSize() {
        return data.size();
    }
//-----------------------------------------
    public Object getElementAt(int index) {
        return data.elementAt(index);
    }
//-----------------------------------------
    public void addElement(String s) {
        data.addElement(s);
        fireIntervalAdded(this, data.size()-1, data.size());
    }
//-----------------------------------------
    public void removeElement(String s) {
        data.removeElement(s);
        fireIntervalRemoved(this, 0, data.size());
    }
}