?? jlistmdemo.java
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import java.awt.*;
import java.awt.event.*;
import java.util.*;
//swing classes
import com.sun.java.swing.text.*;
import com.sun.java.swing.*;
import com.sun.java.swing.event.*;
public class JListMDemo extends JxFrame
implements ActionListener
{
JTextField text;
JList list;
JButton Add;
JListData ldata;
public JListMDemo()
{
super("JList demo");
JPanel jp = new JPanel();
getContentPane().add(jp);
jp.setLayout(new BorderLayout());
//create text field
text = new JTextField(20);
jp.add("North", text);
//Add button
Add = new JButton("Add");
JPanel p = new JPanel();
jp.add("South", p);
p.add(Add);
Add.addActionListener(this);
//create scroll pane
JScrollPane sp = new JScrollPane();
jp.add("Center", sp); //add to layout
ldata = new JListData();
list= new JList(ldata); //create list with data
sp.getViewport().add(list); //add list to scrollpane
setSize(200,200);
setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
ldata.addElement(text.getText());
}
static public void main(String[] arv)
{
new JListMDemo();
}
}
//======================================
class JListData extends AbstractListModel {
private Vector dlist; //the color name list
public JListData() {
dlist = new Vector();
makeData();
}
public int getSize() {
return dlist.size();
}
private Vector makeData()
{
dlist = new Vector(); //create vector
dlist.addElement("Anchovies"); //and add data
dlist.addElement("Bananas");
dlist.addElement("Cilantro");
dlist.addElement("Doughnuts");
dlist.addElement("Escarole");
return dlist;
}
public Object getElementAt(int index) {
return dlist.elementAt(index);
}
//add string to list and tell the list about it
public void addElement(String s) {
dlist.addElement(s);
fireIntervalAdded(this, dlist.size()-1, dlist.size());
}
}
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