corejava第10版

corejava第10版/v2ch10/splitPane/SplitPaneFrame.java

@@ -0,0 +1,53 @@
+package splitPane;
+
+import java.awt.*;
+
+import javax.swing.*;
+
+/**
+ * This frame consists of two nested split panes to demonstrate planet images and data.
+ */
+class SplitPaneFrame extends JFrame
+{
+   private static final int DEFAULT_WIDTH = 300;
+   private static final int DEFAULT_HEIGHT = 300;
+
+   private Planet[] planets = { new Planet("Mercury", 2440, 0), new Planet("Venus", 6052, 0),
+         new Planet("Earth", 6378, 1), new Planet("Mars", 3397, 2),
+         new Planet("Jupiter", 71492, 16), new Planet("Saturn", 60268, 18),
+         new Planet("Uranus", 25559, 17), new Planet("Neptune", 24766, 8),
+         new Planet("Pluto", 1137, 1), };
+
+   public SplitPaneFrame()
+   {
+      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
+
+      // set up components for planet names, images, descriptions
+
+      final JList<Planet> planetList = new JList<>(planets);
+      final JLabel planetImage = new JLabel();
+      final JTextArea planetDescription = new JTextArea();
+
+      planetList.addListSelectionListener(event ->
+         {
+            Planet value = (Planet) planetList.getSelectedValue();
+
+            // update image and description
+
+            planetImage.setIcon(value.getImage());
+            planetDescription.setText(value.getDescription());
+         });
+
+      // set up split panes
+
+      JSplitPane innerPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, planetList, planetImage);
+
+      innerPane.setContinuousLayout(true);
+      innerPane.setOneTouchExpandable(true);
+
+      JSplitPane outerPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, innerPane,
+            planetDescription);
+
+      add(outerPane, BorderLayout.CENTER);
+   }
+}