java gui中写JTree，和JTable_JAVA_编程开发_程序员俱乐部

?

?

实现附件中图片的效果的java代码：

?

package test;

import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
/**
 * 名称：JTree的写法
 * 作者： yue1132
 * 版本：0.0.1
 * 日期：2012-06-29
 */
public class JTreeTest extends JPanel{
	private JTree cityTree;
	/**
	 * @param args
	 */
	public JTreeTest(){
		this.addcityTree();	
	}
	
	private void addcityTree() {
		// TODO Auto-generated method stub
		this.cityTree = new JTree();
		//设置根节点
		DefaultMutableTreeNode root = new DefaultMutableTreeNode("四川省");
		//设置一级节点
		DefaultMutableTreeNode city1 = new DefaultMutableTreeNode("成都市"); 
		DefaultMutableTreeNode city2 = new DefaultMutableTreeNode("绵阳市"); 
		DefaultMutableTreeNode city3 = new DefaultMutableTreeNode("乐山市"); 
		//设置二级目录，并把二级节点绑定到一级节点
		city1.add(new DefaultMutableTreeNode("成都市外国语学校"));
		city1.add(new DefaultMutableTreeNode("成都十二中"));
		city1.add(new DefaultMutableTreeNode("成都七中")); 
		
		city2.add(new DefaultMutableTreeNode("南山中学"));
		city2.add(new DefaultMutableTreeNode("绵阳中学"));
		city2.add(new DefaultMutableTreeNode("绵阳三中"));
		
		city3.add(new DefaultMutableTreeNode("乐山外国语学校"));
		city3.add(new DefaultMutableTreeNode("乐山二中"));
		//把一级目录绑定到根节点
		root.add(city1);
		root.add(city2);
		root.add(city3);
		
		DefaultTreeModel  model= new DefaultTreeModel(root);	
		this.cityTree.setBounds(0, 0, 200, 450);
		this.cityTree.setModel(model);
		for (int i = 0; i < cityTree.getRowCount(); i++)
			cityTree.expandRow(i);
		this.add(cityTree);
		//JTree添加选择监听器
		cityTree.addTreeSelectionListener(new TreeSelectionListener() {
			
			public void valueChanged(TreeSelectionEvent e) {
				// TODO Auto-generated method stub
			DefaultMutableTreeNode select = (DefaultMutableTreeNode)e.getPath().getLastPathComponent();
			//如果当前选中一个节点，则弹出一个对话框并显示节点上的文本内容
			if(select.toString()!=null){
					JOptionPane.showMessageDialog(null, select.toString());
				}
			}
		});	
		
	}
	//添加一个Frame测试新建的cityTree
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		JFrame frame =new JFrame();
		frame.getContentPane().setLayout(null);
		frame.setDefaultCloseOperation(3);
		frame.setSize(800, 600);
		
		JTreeTest tree = new JTreeTest();
		tree.setLayout(null);
		tree.setBounds(10, 10, 200, 500);
		frame.getContentPane().add(tree);//把tree面板添加到JFrame中
		frame.setLocationRelativeTo(null);//设置JFrame居中对齐
		frame.setVisible(true);//设置JFrame可见

	}
}

• 
• 大小: 36 KB

• 查看图片附件