Java Swing Example : JList, JOptionPane, NetBeans


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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