揭帖吧,浪费我一个小时,呵呵。
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import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.tree.DefaultMutableTreeNode;public class MyJTree extends JFrame implements javax.swing.tree.TreeModel{
private JTree jTree1 = new JTree(this.getDefaultTreeModel());
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch(Exception e) {
e.printStackTrace();
}
MyJTree mtf=new MyJTree();
mtf.setSize(400,300);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = mtf.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
mtf.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2); mtf.setVisible(true);
mtf.setTitle("MyButton") ; mtf.show(); } public MyJTree() {
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
private void jbInit() throws Exception {
jTree1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(MouseEvent e) {
jTree1_mouseClicked(e);
}
});
this.getContentPane().add(jTree1, BorderLayout.CENTER);
} void jTree1_mouseClicked(MouseEvent e) {
if(e.getClickCount()==1){
System.out.println("jTree1.getSelectionCount()="+jTree1.getSelectionCount());
}else if(e.getClickCount()==2){
System.out.println("2"); }
} static javax.swing.tree.TreeModel getDefaultTreeModel() {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("桌面");
DefaultMutableTreeNode parent; parent = new DefaultMutableTreeNode("我的文档");
root.add(parent);
parent.add(new DefaultMutableTreeNode("Adobe"));
parent.add(new DefaultMutableTreeNode("My Pictures"));
parent.add(new DefaultMutableTreeNode("My eBooks"));
parent.add(new DefaultMutableTreeNode("我接收到的文件")); parent = new DefaultMutableTreeNode("我的电脑");
root.add(parent);
parent.add(new DefaultMutableTreeNode("SYS(c:)"));
parent.add(new DefaultMutableTreeNode("PRO(d:)"));
parent.add(new DefaultMutableTreeNode("BAK(e:)"));
parent.add(new DefaultMutableTreeNode("ENT(f:)")); parent = new DefaultMutableTreeNode("网上邻居");
root.add(parent);
parent.add(new DefaultMutableTreeNode("整个网络"));
parent.add(new DefaultMutableTreeNode("我的网站"));
parent.add(new DefaultMutableTreeNode("临近计算机"));
return new javax.swing.tree.DefaultTreeModel(root);
}
public Object getRoot(){
return null;
} public Object getChild(Object parent, int index){
return null;
} public int getChildCount(Object parent){
return 0;
} public boolean isLeaf(Object node){
return true;
} public void valueForPathChanged(javax.swing.tree.TreePath path, Object newValue){ }
public int getIndexOfChild(Object parent, Object child){
return 0;
}
public void addTreeModelListener(javax.swing.event.TreeModelListener l){ } public void removeTreeModelListener(javax.swing.event.TreeModelListener l){}}
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