Java Swing Examples: JList
NetBeans - Internet & Web Programming Lab
Design:
Sourcecode:
/*
* sw4_list.java
*
* Created on Nov 26, 2011, 1:32:59 PM
*/
package swing;
import javax.swing.DefaultListModel;
import javax.swing.JOptionPane;
/**
*
* @author nn
*/
public class sw4_list extends javax.swing.JFrame {
DefaultListModel l1,l2;
/** Creates new form sw4_list */
public sw4_list() {
initComponents();
jList1.setModel(l1= new DefaultListModel());
jList2.setModel(l2= new DefaultListModel());
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jList1 = new javax.swing.JList();
jScrollPane2 = new javax.swing.JScrollPane();
jList2 = new javax.swing.JList();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
jButton4 = new javax.swing.JButton();
jButton5 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jButton6 = new javax.swing.JButton();
jButton7 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jScrollPane1.setViewportView(jList1);
jScrollPane2.setViewportView(jList2);
jButton1.setText("ADD");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("REMOVE");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jButton3.setText("SORT");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
});
jButton4.setText("<");
jButton4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton4ActionPerformed(evt);
}
});
jButton5.setText(">");
jButton5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton5ActionPerformed(evt);
}
});
jLabel1.setText("List 1");
jLabel2.setText("List 2");
jButton6.setText("<<");
jButton6.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton6ActionPerformed(evt);
}
});
jButton7.setText(">>");
jButton7.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton7ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(12, 12, 12)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(18, 18, 18)
.addComponent(jLabel1))
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 81, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(57, 57, 57)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(10, 10, 10)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 79, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(10, 10, 10)
.addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(10, 10, 10)
.addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(10, 10, 10)
.addComponent(jButton4, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton5, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton7, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(50, 50, 50)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(20, 20, 20)
.addComponent(jLabel2))
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 79, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(10, 10, 10)
.addComponent(jLabel1)
.addGap(8, 8, 8)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 228, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(40, 40, 40)
.addComponent(jButton1)
.addGap(1, 1, 1)
.addComponent(jButton2)
.addGap(1, 1, 1)
.addComponent(jButton3)
.addGap(11, 11, 11)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton4)
.addComponent(jButton5))
.addGap(1, 1, 1)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton7, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGroup(layout.createSequentialGroup()
.addGap(20, 20, 20)
.addComponent(jLabel2)
.addGap(3, 3, 3)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 228, javax.swing.GroupLayout.PREFERRED_SIZE))
);
pack();
}// </editor-fold>//GEN-END:initComponents
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
// TODO add your handling code here:
Object[] listops= {"List 1","List 2"};
String ch=(String) JOptionPane.showInputDialog(rootPane, "Select","Select List Box", JOptionPane.PLAIN_MESSAGE,null, listops,"list1");
if(ch.compareTo("List 1")==0)
l1.addElement(JOptionPane.showInputDialog("Enter the element: "));
else
l2.addElement(JOptionPane.showInputDialog("Enter the element: "));
}//GEN-LAST:event_jButton1ActionPerformed
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
// TODO add your handling code here:
Object[] obj1 = jList1.getSelectedValues();
Object[] obj2 = jList2.getSelectedValues();
if((obj1.length==0)&&(obj2.length==0))
JOptionPane.showMessageDialog(rootPane, "Please select an item");
else
{
int i;
for(i=0;i<obj1.length;i++)
l1.removeElement(obj1[i]);
for(i=0;i<obj2.length;i++)
l2.removeElement(obj2[i]);
}
}//GEN-LAST:event_jButton2ActionPerformed
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed
// TODO add your handling code here:
Object[] listops= {"List 1","List 2"};
String ch=(String) JOptionPane.showInputDialog(rootPane, "Select","Select List Box", JOptionPane.PLAIN_MESSAGE,null, listops,"list1");
if(ch.compareTo("List 1")==0)
l1= sort(l1);
else
l2=sort(l2);
}//GEN-LAST:event_jButton3ActionPerformed
private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton5ActionPerformed
// TODO add your handling code here:
Object[] temp = jList1.getSelectedValues();
if(temp.length>1)
JOptionPane.showMessageDialog(rootPane, "Please select only one item...");
else if(temp.length<1)
JOptionPane.showMessageDialog(rootPane, "Please select an item...");
else
{
l2.addElement(temp[0]);
l1.removeElement(temp[0]);
}
}//GEN-LAST:event_jButton5ActionPerformed
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton4ActionPerformed
// TODO add your handling code here:
Object[] temp = jList2.getSelectedValues();
if(temp.length>1)
JOptionPane.showMessageDialog(rootPane, "Please select only one item...");
else if(temp.length<1)
JOptionPane.showMessageDialog(rootPane, "Please select an item...");
else{
l1.addElement(temp[0]);
l2.removeElement(temp[0]);
}
}//GEN-LAST:event_jButton4ActionPerformed
private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton7ActionPerformed
// TODO add your handling code here:
Object[] temp = jList1.getSelectedValues();
if(temp.length<1)
JOptionPane.showMessageDialog(rootPane, "Please select an item...");
else{
for(int i=0;i<temp.length;i++)
{
l2.addElement(temp[i]);
l1.removeElement(temp[i]);
}
}
}//GEN-LAST:event_jButton7ActionPerformed
private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton6ActionPerformed
// TODO add your handling code here:
Object[] temp = jList2.getSelectedValues();
if(temp.length<1)
JOptionPane.showMessageDialog(rootPane, "Please select an item...");
else{
for(int i=0;i<temp.length;i++)
{
l1.addElement(temp[i]);
l2.removeElement(temp[i]);
}}
}//GEN-LAST:event_jButton6ActionPerformed
public DefaultListModel sort (DefaultListModel dm){
Object[] obj = dm.toArray();
int n= obj.length;
for(int i=0;i<n;i++)
for(int j=0;j<n-i-1;j++)
if(Integer.parseInt(obj[j].toString())>Integer.parseInt(obj[j+1].toString()))
{
Object temp = obj[j];
obj[j]=obj[j+1];
obj[j+1]=temp;
}
dm.removeAllElements();
for(int i=0;i<n;i++)
dm.addElement(obj[i]);
return dm;
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(sw4_list.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(sw4_list.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(sw4_list.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(sw4_list.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new sw4_list().setVisible(true);
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JButton jButton4;
private javax.swing.JButton jButton5;
private javax.swing.JButton jButton6;
private javax.swing.JButton jButton7;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JList jList1;
private javax.swing.JList jList2;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
// End of variables declaration//GEN-END:variables
}
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