LAB 1_Listtest

ListTest

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 
import javax.swing.event.*; 
class ListTest extends JFrame { 
 private static final int DEFAULT_WIDTH = 400; 
 private static final int DEFAULT_HEIGHT = 300; 
 private JPanel listPanel,buttonPanel; 
 private JList wordList; 
 private JLabel label; 
 private ButtonGroup group; 
 private String prefix = " day "; 
 private String suffix = " Heppy Day "; 
 public ListTest () { 
  setTitle(" ListTest "); 
  setSize(DEFAULT_WIDTH,DEFAULT_HEIGHT); 


  String[]words = {" sun " , " mun " , " tue " , " wed " , " thr " , " fri " , " sat "}; 


  wordList = new JList(words); 
  wordList.setVisibleRowCount (4); 
  wordList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); 
  JScrollPane scrollPane = new JScrollPane (wordList); 


       listPanel = new JPanel (); 
   listPanel.add (scrollPane); 
   wordList.addListSelectionListener(new ListSelectionListener(){ 
   public void valueChanged (ListSelectionEvent event){ 
    Object[]values = wordList.getSelectedValues (); 
    
    StringBuffer temp = new StringBuffer (prefix); 
    for ( int i = 0; i < values.length; i++ ){ 
    String word = (String)values[i]; 
    
    temp.append(word);
    temp.append(" "); 
    } 
    temp.append(suffix); 
    label.setText(temp.toString()); 
   } 
   }); 
    


  buttonPanel = new JPanel(); 
  group = new ButtonGroup(); 
  makeButton ("Vertical",JList.VERTICAL); 
  makeButton("VerticalWrap",JList.VERTICAL_WRAP); 
  makeButton("Horizontal Wrap",JList.HORIZONTAL_WRAP); 


  add(listPanel,BorderLayout.NORTH); 
  label = new JLabel (prefix + suffix); 
  add(label,BorderLayout.CENTER); 
  add(buttonPanel,BorderLayout.SOUTH); 
 } 


 private void makeButton(String label,final int orientation){ 
  JRadioButton button = new JRadioButton(label); 
  buttonPanel.add(button); 
  
  if (group.getButtonCount()==0)button.setSelected(true); 
  group.add(button); 
  button.addActionListener(new ActionListener(){ 
   public void actionPerformed(ActionEvent event){ 
    wordList.setLayoutOrientation(orientation); 
    listPanel.revalidate(); 
   } 
  }); 
 } 
    public static void main (String[]args){ 
    JFrame frame = new ListTest(); 
    frame.addWindowListener(new WindowAdapter(){ 
    public void windowClosing (WindowEvent e){ 
    System.exit (0); 
    } 
    });   
 frame.setVisible (true);   
 }   
}