Java Swing - JProgressBar, JOptionPane Example
Sum of First n Numbers
NetBeans - Internet & Web Programming Lab
Design:
Source code:
/* * sw13.java * * Created on 19 Oct, 2011, 6:57:22 PM */ package swingexamples; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.JOptionPane; /** * * @author gcecse */ public class sw13 extends javax.swing.JFrame { /** Creates new form sw13 */ public sw13() { initComponents(); } /** 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"> private void initComponents() { jProgressBar1 = new javax.swing.JProgressBar(); jLabel1 = new javax.swing.JLabel(); jTextField1 = new javax.swing.JTextField(); jButton1 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jProgressBar1.setStringPainted(true); jLabel1.setText("Enter the limit:"); jButton1.setText("Start"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(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() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(36, 36, 36) .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 146, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 77, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(layout.createSequentialGroup() .addGap(140, 140, 140) .addComponent(jButton1)) .addGroup(layout.createSequentialGroup() .addGap(65, 65, 65) .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 260, javax.swing.GroupLayout.PREFERRED_SIZE))) .addContainerGap(75, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(56, 56, 56) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel1) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 67, Short.MAX_VALUE) .addComponent(jButton1) .addGap(36, 36, 36) .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(50, 50, 50)) ); pack(); }// </editor-fold> private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: double limit=Double.parseDouble(jTextField1.getText()); double sum=0; for(int i=0;i<=limit;i++) { try { sum += i; Thread.sleep(1000); jProgressBar1.setValue((int) (i / limit * 100)); } catch (InterruptedException ex) { Logger.getLogger(sw13.class.getName()).log(Level.SEVERE, null, ex); } } JOptionPane.showMessageDialog(null,"The sum is:"+sum); } /** * @param args the command line arguments */ public static void main(String args[]) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new sw13().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JButton jButton1; private javax.swing.JLabel jLabel1; private javax.swing.JProgressBar jProgressBar1; private javax.swing.JTextField jTextField1; // End of variables declaration }
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