java swing的树操作
import java.awt.Dimension;import java.awt.Image;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;
public class MyTree extends JFrame {
//增加带滚动条容器
private JScrollPane jScrollPane1 = new JScrollPane();
private JTree tree;
private JPopupMenu popMenu;
public JScrollPane getjScrollPane1() {
return jScrollPane1;
}
public void setjScrollPane1(JScrollPane jScrollPane1) {
this.jScrollPane1 = jScrollPane1;
}
public JPopupMenu getPopMenu() {
return popMenu;
}
public void setPopMenu(JPopupMenu popMenu) {
this.popMenu = popMenu;
}
public MyTree() {
try {
init();
treeInit();
popMenuInit();
} catch (Exception exception) {
exception.printStackTrace();
}
this.setSize(800, 600);
this.setResizable(true);
this.setMinimumSize(new Dimension(800, 600));
this.setLocationRelativeTo(null);
this.setVisible(true);
//退出时需要终止当前jvm
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
//设置当前窗口的信息
private void init() {
getContentPane().setLayout(null);
setTitle("树操作");
}
//初始化景点分类树
public void treeInit() {
if (jScrollPane1 != null) {
this.remove(jScrollPane1);
}
jScrollPane1.setBounds(new Rectangle(0, 0, 800, 600));
jScrollPane1.setAutoscrolls(true);
this.getContentPane().add(jScrollPane1);
expandTree();
tree.addMouseListener(new TreePopMenuEvent(this));
this.repaint();
}
//右键点击分类导航树的菜单
private void popMenuInit() {
popMenu = new JPopupMenu();
JMenuItem addItem = new JMenuItem("添加");
addItem.addActionListener(new TreeAddViewMenuEvent(this));
JMenuItem delItem = new JMenuItem("删除");
delItem.addActionListener(new TreeDeleteViewMenuEvent(this));
JMenuItem modifyItem = new JMenuItem("修改");
modifyItem.addActionListener(new TreeModifyViewMenuEvent(this));
popMenu.add(addItem);
popMenu.add(delItem);
popMenu.add(modifyItem);
}
/**
* 完全展开一个JTree
*
* @param tree JTree
*/
public void expandTree() {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("根节点");
tree = new JTree(root);
tree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent e) { //选中菜单节点的事件
DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
}
});
tree.updateUI();
jScrollPane1.getViewport().add(tree);
}
/**
* 获取图片文件内容
*
* @param fileName
* @return
*/
public Image getImage(String fileName) {
FileInputStream fis = null;
try {
fis = new FileInputStream(fileName);
BufferedInputStream bis = new BufferedInputStream(fis);
ByteBuffer bb = ByteBuffer.allocate(1024 * 1024);
byte[] buffer = new byte[1];
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补充:软件开发 , Java ,