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package swing.tree; import java.awt.BorderLayout; import java.awt.Component; import java.awt.Font; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.lang.reflect.Field; import java.util.Enumeration; import javax.lang.model.element.Modifier; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.JTree; import javax.swing.SwingUtilities; import javax.swing.event.TreeSelectionEvent; import javax.swing.event.TreeSelectionListener; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.DefaultTreeCellRenderer; import javax.swing.tree.DefaultTreeModel; import javax.swing.tree.TreeNode; import javax.swing.tree.TreePath; import javax.swing.tree.TreeSelectionModel; /*2015-7-11*/ public class ClassTree { public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { ClassTreeFrame frame = new ClassTreeFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); frame.setLocationRelativeTo(null); } }); } } class ClassTreeFrame extends JFrame { private static final long serialVersionUID = 3866055150465649395L; private DefaultMutableTreeNode root; private DefaultTreeModel model; private JTree tree; private JTextField textField; private JTextArea textArea; private static final int DEFAULT_WIDTH = 800; private static final int DEFAULT_HEIGHT = 600; public ClassTreeFrame() { setTitle(getClass().getSimpleName()); setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); root = new DefaultMutableTreeNode(java.lang.Object.class); model = new DefaultTreeModel(root); tree = new JTree(model); addClass(getClass()); ClassNameTreeCellRender render = new ClassNameTreeCellRender(); String filename = getClass().getResource("/swing/tree/red-ball.gif").getPath(); render.setClosedIcon(new ImageIcon(filename)); filename = getClass().getResource("/swing/tree/yellow-ball.gif").getPath(); render.setOpenIcon(new ImageIcon(filename)); filename = getClass().getResource("/swing/tree/blue-ball.gif").getPath(); render.setLeafIcon(new ImageIcon(filename)); tree.setCellRenderer(render); tree.addTreeSelectionListener(new TreeSelectionListener() { @Override public void valueChanged(TreeSelectionEvent e) { TreePath path = tree.getSelectionPath(); if (path == null) { return; } DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) path.getLastPathComponent(); Class<?> c = (Class<?>) selectedNode.getUserObject(); String description = getFileDescription(c); textArea.setText(description); } }); int mode = TreeSelectionModel.SINGLE_TREE_SELECTION; tree.getSelectionModel().setSelectionMode(mode); textArea = new JTextArea(); JPanel panel = new JPanel(); panel.setLayout(new GridLayout(1, 2)); panel.add(new JScrollPane(tree)); panel.add(new JScrollPane(textArea)); add(panel, BorderLayout.CENTER); addTextField(); } private void addTextField() { JPanel panel = new JPanel(); ActionListener addListener = new ActionListener() { @Override public void actionPerformed(ActionEvent e) { try { String text = textField.getText(); addClass(Class.forName(text)); textField.setText(""); } catch (ClassNotFoundException e1) { JOptionPane.showMessageDialog(ClassTreeFrame.this, e1.getMessage()); } } }; textField = new JTextField(20); textField.addActionListener(addListener); panel.add(textField); JButton addButton = new JButton("Add"); addButton.addActionListener(addListener); panel.add(addButton); add(panel, BorderLayout.SOUTH); } protected String getFileDescription(Class<?> c) { StringBuilder r = new StringBuilder(); Field[] fields = c.getDeclaredFields(); for (Field field : fields) { if (field.getModifiers() == Modifier.STATIC.ordinal()) { r.append("static"); } r.append(field.getType().getName()) .append("") .append(field.getName()) .append("\n"); } return r.toString(); } private DefaultMutableTreeNode addClass(Class<?> c) { if (c.isInterface() || c.isPrimitive()) { return null; } DefaultMutableTreeNode node = findUserObject(c); if (node != null) { return node; } Class<?> s = c.getSuperclass(); DefaultMutableTreeNode parent; if (s == null) { parent = root; } else { parent = addClass(s); } DefaultMutableTreeNode newChild = new DefaultMutableTreeNode(c); model.insertNodeInto(newChild, parent, parent.getChildCount()); TreePath path = new TreePath(model.getPathToRoot(newChild)); tree.makeVisible(path); return newChild; } private DefaultMutableTreeNode findUserObject(Object obj) { @SuppressWarnings("unchecked") Enumeration<TreeNode> e = root.breadthFirstEnumeration(); while (e.hasMoreElements()) { DefaultMutableTreeNode node = (DefaultMutableTreeNode) e.nextElement(); if (node.getUserObject().equals(obj)) { return node; } } return null; } } class ClassNameTreeCellRender extends DefaultTreeCellRenderer { private static final long serialVersionUID = -2145290206168596413L; private Font plainFont; private Font italicFont; @Override public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) { Component comp = super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus); DefaultMutableTreeNode node = (DefaultMutableTreeNode) value; Class<?> c = (Class<?>) node.getUserObject(); if (plainFont == null) { plainFont = getFont(); if (plainFont == null) { italicFont = plainFont.deriveFont(Font.ITALIC); } } if (c.getModifiers() == Modifier.ABSTRACT.ordinal()) { setFont(plainFont); } else { comp.setFont(italicFont); } return comp; } }
时间: 2024-10-12 13:27:13