demotreeframe.java

java绘图 java awt 经典绘图的例子,对于初学awt模块的人非常有帮助.

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package swing;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeSelectionModel;

/**
 *
 * @author zhaolin
 */
public class DemoTreeFrame extends JFrame {

    public DemoTreeFrame() {
        try {
            JSplitPane jsp = new JSplitPane();
            final JEditorPane jep = new JEditorPane();
            jsp.setOrientation(JSplitPane.VERTICAL_SPLIT);
            DefaultMutableTreeNode root = new DefaultMutableTreeNode("The Java Series");
            createNodes(root);
            final JTree tree = new JTree(root);
            MyTreeCellRender render = new MyTreeCellRender();
            tree.setCellRenderer(render);
            //单选
            tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
            tree.addTreeSelectionListener(new TreeSelectionListener(){

                public void valueChanged(TreeSelectionEvent e) {
                    DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)tree.getSelectionPath().getLastPathComponent();
                    if(selectedNode.isLeaf()){
                        try {
                            BookInfo bInfo = (BookInfo) selectedNode.getUserObject();
                            jep.setPage("file:" + bInfo.getFileName());
                        } catch (IOException ex) {
                            Logger.getLogger(DemoTreeFrame.class.getName()).log(Level.SEVERE, null, ex);
                        }
                    }
                }
                
            });
            jsp.setTopComponent(new JScrollPane(tree));
            jsp.setBottomComponent(new JScrollPane(jep));
            jep.setContentType("text/html");
            jep.setPage("file:help.html");
            jep.setEditable(false);
            this.getContentPane().add(jsp);
            this.pack();
            this.setVisible(true);
        } catch (IOException ex) {
            Logger.getLogger(DemoTreeFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public static void main(String[] args) {
            new DemoTreeFrame();
    }

    private void createNodes(DefaultMutableTreeNode root) {
        DefaultMutableTreeNode category = null;
        DefaultMutableTreeNode book = null;

        category = new DefaultMutableTreeNode(
                "Books for Java Programmers");
        root.add(category);

        //original Tutorial
        book = new DefaultMutableTreeNode(new BookInfo("The Java Tutorial: Object-Oriented " + "Programming for the Internet",
                "tutorial.html"));
        category.add(book);

        //Tutorial Continued
        book = new DefaultMutableTreeNode(new BookInfo("The Java Tutorial Continued: The Rest of the JDK",
                "tutorialcont.html"));
        category.add(book);

        //JFC Swing Tutorial
        book = new DefaultMutableTreeNode(new BookInfo("The JFC Swing Tutorial: " + "A Guide to Constructing GUIs",
                "swingtutorial.html"));
        category.add(book);

        //...add many more books for programmers...

        category = new DefaultMutableTreeNode(
                "Books for Java Implementers");
        root.add(category);

        //VM
        book = new DefaultMutableTreeNode(new BookInfo("The Java Virtual Machine Specification",
                "vm.html"));
        category.add(book);

        //Language Spec
        book = new DefaultMutableTreeNode(new BookInfo("The Java Language Specification",
                "jls.html"));
        category.add(book);

    }
}