Contoh Program Java Menggunakan Kelas JSplitPane

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// Nama file : DemoSplitPane.java
// Menggunakan split pane di aplikasi warna sederhana

// mengimpor kelas
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

//Deklarasi kelas
public class DemoSplitPane extends JFrame {

   private JTextField redField, greenField, blueField;
   private JLabel redLabel, greenLabel, blueLabel;
   private JButton btnColor, btnChangeColor;
   private JSplitPane horSplitPane, verSplitPane;

   // Data field ini mempunyai default value masing-masing 0
   private int redValue, greenValue, blueValue;

   // Kontruktor DemoSplitPane
   public DemoSplitPane() {
   
      Font font = new Font("Tahoma", Font.PLAIN + Font.BOLD, 12);
      redField = new JTextField("" + redValue, 6);
      redField.setHorizontalAlignment(JTextField.RIGHT);
      redField.setEditable(false);
      redField.setFont(font);
      greenField = new JTextField("" + greenValue, 6);
      greenField.setHorizontalAlignment(JTextField.RIGHT);
      greenField.setEditable(false);
      greenField.setFont(font);
      blueField = new JTextField("" + blueValue, 6);
      blueField.setHorizontalAlignment(JTextField.RIGHT);
      blueField.setEditable(false);
      blueField.setFont(font);

      redLabel = new JLabel("RED");
      greenLabel = new JLabel("GREEN");
      blueLabel = new JLabel("BLUE");

      // Meletakkan text field dan label ke panel
      JPanel panel = new JPanel();
      panel.setLayout(new GridLayout(3, 2, 4, 0));
      panel.setBorder(new TitledBorder("RGB Color"));
      panel.add(redLabel);
      panel.add(redField);
      panel.add(greenLabel);
      panel.add(greenField);
      panel.add(blueLabel);
      panel.add(blueField);

      btnColor = new JButton();
      btnColor.setBackground(new Color(redValue, greenValue, blueValue));

      // Meletakkan panel btnColor secara horizontal
      horSplitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, true);
      horSplitPane.setLeftComponent(panel);
      horSplitPane.setRightComponent(btnColor);
      horSplitPane.setOneTouchExpandable(true);

      btnChangeColor = new JButton("Tekan tombol ini untuk menghasilkan warna baru");

      // Meletakkan horSplitPane dan btnChangedColor secara vertikal
      verSplitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, true);
      verSplitPane.setTopComponent(horSplitPane);
      verSplitPane.setBottomComponent(btnChangeColor);
      verSplitPane.setOneTouchExpandable(true);

      getContentPane().add(verSplitPane, BorderLayout.CENTER);

      // Penanganan aksi penekanan tombol
      btnChangeColor.addActionListener(
         new ActionListener() {
            public void actionPerformed(ActionEvent ae) {
 
               // Nilai numerik int acak dengan rentang 0 - 255
               redValue = (int) (Math.random() * 256);
               greenValue = (int) (Math.random() * 256);
               blueValue = (int) (Math.random() * 256);

               btnColor.setBackground(new Color(redValue, greenValue, blueValue));
 
               redField.setText("" + redValue);
               greenField.setText("" + greenValue);
               blueField.setText("" + blueValue);
            }
         }
      );
   }

   // Metoda main
   public static void main(String[] args) {
      DemoSplitPane frame = new DemoSplitPane();
      frame.setTitle("Kelas DemoSplitPane");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setSize(370, 185);
      frame.setVisible(true);
   }
}