GUI example

• ContactUI.java

  public class ContactUI extends javax.swing.JFrame {
      private javax.swing.JButton jButton1;
      private javax.swing.JLabel jLabel1;
      private javax.swing.JLabel jLabel2;
      private javax.swing.JLabel jLabel3;
      private javax.swing.JPanel jPanel1;
      private javax.swing.JPanel jPanel2;
      private javax.swing.JTextField jTextField1;
      private javax.swing.JTextField jTextField2;
      private javax.swing.JTextField jTextField3;
  
      /**
       * Creates new form ContactUI
       */
      public ContactUI() {
          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")
      private void initComponents() {
          jPanel1 = new javax.swing.JPanel();
          jLabel1 = new javax.swing.JLabel();
          jTextField1 = new javax.swing.JTextField();
          jLabel2 = new javax.swing.JLabel();
          jTextField2 = new javax.swing.JTextField();
          jPanel2 = new javax.swing.JPanel();
          jLabel3 = new javax.swing.JLabel();
          jTextField3 = new javax.swing.JTextField();
          jButton1 = new javax.swing.JButton();
  
          setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
  
          jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Name"));
          jPanel1.setName(""); // NOI18N
          jPanel1.setOpaque(false);
  
          jLabel1.setText("First Name:");
  
          jTextField1.addActionListener(new java.awt.event.ActionListener() {
              public void actionPerformed(java.awt.event.ActionEvent evt) {
                  jTextField1ActionPerformed(evt);
              }
          });
  
          jLabel2.setText("Last Name: ");
  
          jTextField2.addActionListener(new java.awt.event.ActionListener() {
              public void actionPerformed(java.awt.event.ActionEvent evt) {
                  jTextField2ActionPerformed(evt);
              }
          });
  
          javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
          jPanel1.setLayout(jPanel1Layout);
          jPanel1Layout.setHorizontalGroup(
              jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
              .addGroup(jPanel1Layout.createSequentialGroup()
                  .addGap(38, 38, 38)
                  .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                      .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, 60, Short.MAX_VALUE)
                      .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                  .addGap(18, 18, 18)
                  .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                      .addComponent(jTextField1)
                      .addComponent(jTextField2, javax.swing.GroupLayout.DEFAULT_SIZE, 143, Short.MAX_VALUE))
                  .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
          );
          jPanel1Layout.setVerticalGroup(
              jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
              .addGroup(jPanel1Layout.createSequentialGroup()
                  .addContainerGap()
                  .addGroup(jPanel1Layout.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)
                  .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                      .addComponent(jLabel2)
                      .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                  .addContainerGap(55, Short.MAX_VALUE))
          );
  
          jPanel2.setBorder(javax.swing.BorderFactory.createTitledBorder("E-mail"));
  
          jLabel3.setText("Email");
  
          jTextField3.setToolTipText("");
  
          javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
          jPanel2.setLayout(jPanel2Layout);
          jPanel2Layout.setHorizontalGroup(
              jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
              .addGroup(jPanel2Layout.createSequentialGroup()
                  .addGap(44, 44, 44)
                  .addComponent(jLabel3)
                  .addGap(50, 50, 50)
                  .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, 189, javax.swing.GroupLayout.PREFERRED_SIZE)
                  .addContainerGap(28, Short.MAX_VALUE))
          );
          jPanel2Layout.setVerticalGroup(
              jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
              .addGroup(jPanel2Layout.createSequentialGroup()
                  .addGap(25, 25, 25)
                  .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                      .addComponent(jLabel3)
                      .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                  .addContainerGap(58, Short.MAX_VALUE))
          );
  
          jButton1.setText("Done");
          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()
                          .addContainerGap()
                          .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                              .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                              .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
                      .addGroup(layout.createSequentialGroup()
                          .addGap(151, 151, 151)
                          .addComponent(jButton1)))
                  .addContainerGap(63, Short.MAX_VALUE))
          );
          layout.setVerticalGroup(
              layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
              .addGroup(layout.createSequentialGroup()
                  .addContainerGap()
                  .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                  .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                  .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                  .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                  .addComponent(jButton1)
                  .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
          );
  
          pack();
      }
  
      private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
          // TODO add your handling code here:
      }
  
      private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) {
          // TODO add your handling code here:
      }
  
      private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
          System.exit(0);
      }
  
      /**
       * @param args the command line arguments
       */
      public static void main(String args[]) {
          /* Set the Nimbus look and feel */
          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(ContactUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
          } catch (InstantiationException ex) {
              java.util.logging.Logger.getLogger(ContactUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
          } catch (IllegalAccessException ex) {
              java.util.logging.Logger.getLogger(ContactUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
          } catch (javax.swing.UnsupportedLookAndFeelException ex) {
              java.util.logging.Logger.getLogger(ContactUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
          }
  
          /* Create and display the form */
          java.awt.EventQueue.invokeLater(new Runnable() {
              public void run() {
                  new ContactUI().setVisible(true);
              }
          });
      }
  }

• Contacts.java

  import javax.swing.JFrame;
  
  public class Contacts {
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
    JFrame frame = new ContactUI();
    frame.setTitle("GUI Test");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
    }
  }