JFrame居中
方法一：
setLocationRelativeTo(null);
注意：必须在整个frame初始化完成后再加上此语句，否则将显示在屏幕右下角
方法二：
private Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
/** 屏幕宽度 */
private int screenWidth = screenSize.width;
/** 屏幕高度 */
private int screenHeight = screenSize.height;
jFrame.setLocation((screenWidth - FRAME_WIDTH) / 2, (screenHeight - FRAME_HEIGHT) / 2);
package component.tree;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Toolkit;
import javax.swing.JDialog;
import javax.swing.JTree;
/*2015-5-26*/
public class MyDialog extends JDialog{
private JTree tree=new JTree();
public MyDialog(Dialog owner) {
super(owner,true);
setSize(800,600);
add(tree);
setLocation(getCenterPoint());
}
private Point getCenterPoint(){
int windowWidth = this.getWidth(); //获得窗口宽
int windowHeight = this.getHeight(); //获得窗口高
Toolkit kit = Toolkit.getDefaultToolkit(); //定义工具包
Dimension screenSize = kit.getScreenSize(); //获取屏幕的尺寸
int screenWidth = screenSize.width; //获取屏幕的宽
int screenHeight = screenSize.height; //获取屏幕的高
return new Point(screenWidth / 2 - windowWidth / 2, screenHeight / 2 - windowHeight / 2);//窗口居中时的x，y
}
public JTree getTree() {
return tree;
}
}
package component.tree;
import static common.SwingConsole.run;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
/*2015-5-26*/
public class Main extends JFrame {
public Main() throws HeadlessException {
super();
JButton button=new JButton("OK");
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
MyDialog dlg=new MyDialog(null);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("资源管理器");
DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("我的公文包");
DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("我的电脑");
DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("收藏夹");
DefaultMutableTreeNode node4 = new DefaultMutableTreeNode("Readme");
DefaultTreeModel treeModel = new DefaultTreeModel(root);
/*
* DefaultTreeModel类所提供的insertNodeInto()方法加入节点到父节点的数量.
* 利用DefaultMutableTreeNode类所提供的getChildCount()方法取得目前子节点的数量.
*/
treeModel.insertNodeInto(node1, root, root.getChildCount());
treeModel.insertNodeInto(node2, root, root.getChildCount());
treeModel.insertNodeInto(node3, root, root.getChildCount());
treeModel.insertNodeInto(node4, root, root.getChildCount());
DefaultMutableTreeNode leafnode = new DefaultMutableTreeNode("公司文件");
// DefaultTreeModel类所提供的insertNodeInto()方法加入节点到父节点的数量.
treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
leafnode = new DefaultMutableTreeNode("个人信件");
treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
leafnode = new DefaultMutableTreeNode("私人文件");
treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
leafnode = new DefaultMutableTreeNode("本机磁盘(C:)");
treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
leafnode = new DefaultMutableTreeNode("本机磁盘(D:)");
treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
leafnode = new DefaultMutableTreeNode("本机磁盘(E:)");
treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
DefaultMutableTreeNode node31 = new DefaultMutableTreeNode("网站列表");
treeModel.insertNodeInto(node31, node3, node3.getChildCount());
leafnode = new DefaultMutableTreeNode("奇摩站");
treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
leafnode = new DefaultMutableTreeNode("职棒消息");
treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
leafnode = new DefaultMutableTreeNode("网络书店");
treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
dlg.getTree().setModel(treeModel);
dlg.setVisible(true);
}
});
add(button);
}
public static void main(String[] args) {
run(new Main(),200,100);
}
}
package common;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
/*2015-5-26*/
public class SwingConsole {
public static void run(final JFrame frame,final int width,final int height){
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
frame.setSize(width, height);
frame.setTitle(frame.getClass().getSimpleName());
frame.setVisible(true);
}
});
}
}
http://www.iteedu.com/plang/java/jtswingchxshj/56.php
http://www.blogjava.net/santicom/archive/2011/03/23/346796.html
http://etwo.iteye.com/blog/1458414
package swing.tree;
import static common.SwingConsole.run;
import javax.swing.JFrame;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
/*2015-6-1*/
public class JTreeDemo extends JFrame{
private static final long serialVersionUID = 1L;
public JTreeDemo() {
JTree tree=new JTree();
/* DefaultMutableTreeNode root=new DefaultMutableTreeNode("我的电脑");
DefaultMutableTreeNode c=new DefaultMutableTreeNode("C:");
DefaultMutableTreeNode d=new DefaultMutableTreeNode("D:");
DefaultMutableTreeNode c1=new DefaultMutableTreeNode("C1");
DefaultMutableTreeNode c2=new DefaultMutableTreeNode("C2");*/
Dir dir=new Dir("root", "My computer", "Y");
Dir c=new Dir("C:", "第一个盘", "N");
Dir d=new Dir("D:", "第二个盘", "Y");
Dir c1=new Dir("c1", "盘一C1", "Y");
Dir c2=new Dir("c2", "盘一C2", "Y");
DefaultMutableTreeNode root=new DefaultMutableTreeNode(dir);
DefaultMutableTreeNode cNode=new DefaultMutableTreeNode(c);
DefaultMutableTreeNode dNode=new DefaultMutableTreeNode(d);
DefaultMutableTreeNode c1Node=new DefaultMutableTreeNode(c1);
DefaultMutableTreeNode c2Node=new DefaultMutableTreeNode(c2);
DefaultTreeModel model=new DefaultTreeModel(root);
model.insertNodeInto(cNode, root, root.getChildCount());
model.insertNodeInto(dNode, root, root.getChildCount());
model.insertNodeInto(c1Node, cNode,cNode.getChildCount());
model.insertNodeInto(c2Node, cNode, cNode.getChildCount());
tree.setModel(model);
this.add(tree);
tree.setSize(400, 200);
}
public static void main(String[] args) {
run(new JTreeDemo(), 800, 600);
}
}
class Dir{
private String path;
private String name;
private String access;
public Dir(String path, String name, String access) {
super();
this.path = path;
this.name = name;
this.access = access;
}
@Override
public String toString() {
return path;//GUI上树显示的节点信息
}
}
package swing.tree;
import static common.SwingConsole.run;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import javax.swing.BorderFactory;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTree;
import javax.swing.border.Border;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
import com.sun.security.auth.UserPrincipal;
/*2015-6-1*/
public class JTreeDemo extends JFrame {
private static final long serialVersionUID = 1L;
private JTree tree;
private DefaultMutableTreeNode root;
private DefaultTreeModel model;
private JPanel content;
private Border inBorder = BorderFactory.createLineBorder(Color.LIGHT_GRAY);
public JTreeDemo() {
initGUI();
initListener();
}
private void initGUI() {
content = new JPanel();
content.setLayout(new BorderLayout());
getContentPane().add(content);
root = new DefaultMutableTreeNode();
model = new DefaultTreeModel(root);
for (int i = 1; i <= 3; i++) {
DemoNode cate = new DemoNode(produceImage("arrow_left.png"), new UserPrincipal("我的好友" + i));
for (int j = 1; j <= 3; j++) {
DemoNode node = new DemoNode(produceImage("avatar.png"), new UserPrincipal("好友" + i + "-" + j), "人生若只如初见");
cate.add(node);
}
root.add(cate);
}
tree = new JTree();
tree.setModel(model);
tree.setRootVisible(false);
tree.setToggleClickCount(1);
tree.setCellRenderer(new DemoRenderer());// 更改节点图标
tree.putClientProperty("JTree.lineStyle", "None");// 去掉父子节点之间的线条
content.add(tree, BorderLayout.CENTER);
}
private Icon produceImage(String name) {
ImageIcon backImage = new ImageIcon(getClass().getClassLoader().getResource(name));
return backImage;
}
private void initListener() {
tree.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
TreePath path = tree.getSelectionPath();
if (null != path) {
Object object = path.getLastPathComponent();
DemoNode node = (DemoNode) object;
// 二级节点（分组）咱就不管了
if (node.getLevel() == 2) {
node.nodeContent.setBorder(inBorder);
node.nodeContent.setBackground(Color.ORANGE);
// 去掉选中之外其他所有节点的特效
for (int i = 0; i < root.getChildCount(); i++) {
DemoNode cate = (DemoNode) root.getChildAt(i);
// 三级节点
for (int j = 0; j < cate.getChildCount(); j++) {
DemoNode buddy = (DemoNode) cate.getChildAt(j);
if (node != buddy) {
buddy.nodeContent.setBorder(null);
buddy.nodeContent.setBackground(null);
}
model.reload(buddy);
}
}
model.reload(node);
}
}
}
});
tree.addMouseMotionListener(new MouseMotionAdapter() {
// 没有使用moseEnter事件，是因为此方法里面没有可以获取当前节点的API
// 大家若是知道有更好的方法，可以告诉我一下，感激不尽
// 还有，大家看到如下方法，循环太多，如果节点过多的话，效率就不行了，但是事件只能加到jtree上，如果能加到我重绘的UI上就好了。。。
@Override
public void mouseMoved(MouseEvent e) {
TreePath path = tree.getPathForLocation(e.getX(), e.getY());
if (null != path) {
Object object = path.getLastPathComponent();
DemoNode node = (DemoNode) object;
// 不管三七二十一，先把自己的特效加上再说
// 这里因为是鼠标移动事件，触发太快了，所以要判断是否在当前节点上移动鼠标
if (node.getLevel() == 1 && node.cateContent.getBorder() != inBorder) {
node.cateContent.setBorder(inBorder);
}
if (node.getLevel() == 2 && node.nodeContent.getBorder() != inBorder) {
node.nodeContent.setBorder(inBorder);
}
model.reload(node);
// 去掉选中之外其他所有节点的特效
for (int i = 0; i < root.getChildCount(); i++) {
DemoNode cate = (DemoNode) root.getChildAt(i);
if (node != cate && cate.cateContent.getBackground() != Color.ORANGE) {
cate.cateContent.setBorder(null);
}
model.reload(cate);
// 三级节点
for (int j = 0; j < cate.getChildCount(); j++) {
DemoNode buddy = (DemoNode) cate.getChildAt(j);
if (node != buddy && buddy.nodeContent.getBackground() != Color.ORANGE) {
buddy.nodeContent.setBorder(null);
}
model.reload(buddy);
}
}
}
}
});
}
public static void main(String[] args) {
run(new JTreeDemo(), 300, 600);
}
}
class UserObject {
private String path;
private String name;
private String access;
public UserObject(String path, String name, String access) {
super();
this.path = path;
this.name = name;
this.access = access;
}
@Override
public String toString() {
return name;// GUI上树显示的节点信息
}
}
package swing.tree;
import java.awt.Component;
import java.awt.Dimension;
import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.tree.DefaultMutableTreeNode;
/*2015-6-7*/
public class DemoNode extends DefaultMutableTreeNode{
private static final long serialVersionUID = 1L;
/** 图片 */
private Icon icon;
/** 节点信息 */
private Object userObject;
/** 签名 */
private String sign;
public JPanel cateContent;
public JPanel nodeContent;
public JLabel iconLabel;
public JLabel nameLabel;
public JLabel signLabel;
/**
* 初始化分组节点
* @param name 名称
*/
public DemoNode(Icon icon, Object name) {
this.icon = icon;
this.userObject = name;
// 初始化UI
initCateGUI();
}
/**
* 初始化好友节点
* @param icon 头像
* @param nick 昵称
* @param sign 签名
*/
public DemoNode(Icon icon, Object nick, String sign) {
this.icon = icon;
this.userObject = nick;
this.sign = sign;
// 初始化UI
initNodeGUI();
}
/**
* 自定义分组UI
*/
private void initCateGUI() {
cateContent = new JPanel();
cateContent.setLayout(null);
// cateContent.setOpaque(false);
// 这里大家注意，当我们写好UI之后可能会发现他的颜色不太对，
// 这时候千万不要用上面那句，不然当我们想再次改变其颜色的时候，就生效不了
// 红绿蓝分别为255的这个颜色趋近于透明，我们可以用它来代替setOpaque
// cateContent.setBackground(new Color(255,255,255));
// 突然发现置成null也可以
cateContent.setBackground(null);
cateContent.setPreferredSize(new Dimension(300, 25));
// cateContent.setBorder(BorderFactory.createLineBorder(Color.LIGHT_GRAY));
iconLabel = new JLabel(icon);
iconLabel.setBounds(6, 5, 20, 16);
cateContent.add(iconLabel);
nameLabel = new JLabel(userObject.toString());
nameLabel.setBounds(23, 0, 132, 28);
cateContent.add(nameLabel);
}
/**
* 自定义好友UI
*/
private void initNodeGUI() {
nodeContent = new JPanel();
nodeContent.setLayout(null);
// nodeContent.setOpaque(false);
nodeContent.setBackground(null);
nodeContent.setPreferredSize(new Dimension(300, 50));
// nodeContent.setBorder(BorderFactory.createLineBorder(Color.LIGHT_GRAY));
iconLabel = new JLabel(icon);
iconLabel.setBounds(8, 4, 39, 42);
nodeContent.add(iconLabel);
nameLabel = new JLabel(userObject.toString());
nameLabel.setBounds(59, 5, 132, 19);
nodeContent.add(nameLabel);
signLabel = new JLabel(sign);
signLabel.setBounds(59, 28, 132, 17);
nodeContent.add(signLabel);
}
/**
* 将自定义UI返回给渲染器 <br/>
* 供渲染器调用，返回的必须是一个Component
* @return
*/
public Component getCateView() {
return cateContent;
}
/**
* 将自定义UI返回给渲染器 <br/>
* 供渲染器调用，返回的必须是一个Component
* @return
*/
public Component getNodeView() {
return nodeContent;
}
}
package swing.tree;
import java.awt.Component;
import javax.swing.ImageIcon;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;
public class DemoRenderer extends DefaultTreeCellRenderer {
private static final long serialVersionUID = 1L;
@Override
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean sel, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
// DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
// // 根节点从0开始，依次往下
// // 分组
// if (node.getLevel() == 1) {
// if (expanded) {
// this.setIcon(new ImageIcon(getClass().getClassLoader().getResource("arrow_down.png")));
// } else {
// this.setIcon(new ImageIcon(getClass().getClassLoader().getResource("arrow_left.png")));
// }
// }
// // 好友
// if (node.getLevel() == 2) {
// this.setIcon(new ImageIcon(getClass().getClassLoader().getResource("qq_icon.png")));
// }
// this.setText(value.toString());
// return this;
// 大家这里注意，我为了节省时间，所以就没有写两个node类
// 所有的代码写在了同一个类中，然后根据不同的节点来调用相应的方法
DemoNode node = (DemoNode) value;
if (node.getLevel() == 1) {
if (expanded) {
node.iconLabel.setIcon(new ImageIcon(getClass().getClassLoader().getResource("arrow_down.png")));
} else {
node.iconLabel.setIcon(new ImageIcon(getClass().getClassLoader().getResource("arrow_left.png")));
}
return node.getCateView();
}
if (node.getLevel() == 2) {
node.iconLabel.setIcon(new ImageIcon(getClass().getClassLoader().getResource("qq_icon.png")));
return node.getNodeView();
}
return this;
}
}
http://www.iteye.com/topic/1138211
