How to Make Error Dialog Box in Java

This is the simple java program that helps programmer to make better layouts. This java code will shows a dialog box with "error-icon" set on the left of your message text.

Source Code

package newpackage.more;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class errorMessageDialog extends javax.swing.JFrame {

    public errorMessageDialog() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    private void initComponents() {

        jButton1 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton1.setFont(new java.awt.Font("Times New Roman", 0, 14)); // NOI18N
        jButton1.setText("Error Message Dialog");
        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()
                .addGap(94, 94, 94)
                .addComponent(jButton1)
                .addContainerGap(75, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(21, 21, 21)
                .addComponent(jButton1)
                .addContainerGap(35, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
        JFrame j=new JFrame();
        j.setAlwaysOnTop(true);
        JOptionPane.showMessageDialog(j, "Your Error Message ", "Your Title: ", JOptionPane.ERROR_MESSAGE);
    }//GEN-LAST:event_jButton1ActionPerformed

    public static void main(String args[]) {
        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(errorMessageDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(errorMessageDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(errorMessageDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(errorMessageDialog.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new errorMessageDialog().setVisible(true);
            }
        });
    }

    private javax.swing.JButton jButton1;
}

Output of the Program

About Asad

Asad Niazi is Software Engineer , Programmer, Web Developer and a young mentor of BloggersTown and PProgramming. Asad Love to writes about Technology, Programming, Blogging and make money online.