本文实例讲述了java swing树状组件jtree用法。分享给大家供大家参考，具体如下：
一、简单样式
先看运行效果：
treenodedemo.java
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package awtdemo;
import javax.swing.jframe;
import javax.swing.jtree;
import javax.swing.event.treeselectionevent;
import javax.swing.event.treeselectionlistener;
import javax.swing.tree.defaultmutabletreenode;
public class treenodedemo {
public static void main(string[] args) {
// 创建没有父节点和子节点、但允许有子节点的树节点，并使用指定的用户对象对它进行初始化。
// public defaultmutabletreenode(object userobject)
defaultmutabletreenode group1 = new defaultmutabletreenode("软件部");
treenode node1 = new treenode();
node1.setname("王雨");
node1.setnickname("漫天飞舞");
group1.add(new defaultmutabletreenode(node1));
treenode node2 = new treenode();
node2.setname("陈梦");
node2.setnickname("梦");
group1.add(new defaultmutabletreenode(node2));
treenode node3 = new treenode();
node3.setname("上官飞儿");
node3.setnickname("飞儿");
group1.add(new defaultmutabletreenode(node3));
defaultmutabletreenode group2 = new defaultmutabletreenode("销售部");
treenode node4 = new treenode();
node4.setname("上官婉儿");
node4.setnickname("婉儿");
group2.add(new defaultmutabletreenode(node4));
treenode node5 = new treenode();
node5.setname("上官巧儿");
node5.setnickname("巧儿");
group2.add(new defaultmutabletreenode(node5));
defaultmutabletreenode top = new defaultmutabletreenode("职员管理");
top.add(group1);
top.add(group2);
final jtree tree = new jtree(top);
jframe f = new jframe("jtreedemo - www.zzvips.com");
f.add(tree);
f.setsize(300, 300);
f.setvisible(true);
f.setdefaultcloseoperation(jframe.exit_on_close);
// 添加选择事件
tree.addtreeselectionlistener(new treeselectionlistener()
{
@override
public void valuechanged(treeselectionevent e)
{
defaultmutabletreenode node = (defaultmutabletreenode) tree.getlastselectedpathcomponent();
if (node == null){
return;
}//if
object object = node.getuserobject();
treenode user = (treenode) object;
system.out.println("你选择了：" + user.tostring());
}
});
}
}
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treenode.java
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package awtdemo;
public class treenode {
private string nickname = "";
private string name = "";
private string phone = "";
private int age;
public string getname() {
return name;
}
public void setname(string name) {
this.name = name;
}
public string getnickname() {
return nickname;
}
public void setnickname(string nickname) {
this.nickname = nickname;
}
public string getphone() {
return phone;
}
public void setphone(string phone) {
this.phone = phone;
}
public int getage() {
return age;
}
public void setage(int age) {
this.age = age;
}
// 重点在tostring，节点的显示文本就是tostring
public string tostring()
{
return name + "["+nickname+"]";
}
}
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二、图标样式
运行效果：
treenode.java
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package awtdemo;
public class treenode {
private string nickname = "";
private string name = "";
private string phone = "";
private int age;
private string imagepath = "";
public string getimagepath() {
return imagepath;
}
public void setimagepath(string imagepath) {
this.imagepath = imagepath;
}
public string getname() {
return name;
}
public void setname(string name) {
this.name = name;
}
public string getnickname() {
return nickname;
}
public void setnickname(string nickname) {
this.nickname = nickname;
}
public string getphone() {
return phone;
}
public void setphone(string phone) {
this.phone = phone;
}
public int getage() {
return age;
}
public void setage(int age) {
this.age = age;
}
// 重点在tostring，节点的显示文本就是tostring
public string tostring()
{
return name + "["+nickname+"]";
}
}
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treecellrenderer.java
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package awtdemo;
import java.awt.component;
import javax.swing.imageicon;
import javax.swing.jtree;
import javax.swing.tree.defaultmutabletreenode;
import javax.swing.tree.defaulttreecellrenderer;
/**
* 自定义树描述类,将树的每个节点设置成不同的图标
*
*/
public class treecellrenderer extends defaulttreecellrenderer{
private static final long serialversionuid = 1l;
/**
* 重写父类defaulttreecellrenderer的方法
*/
@override
public component gettreecellrenderercomponent(jtree tree, object value,
boolean selected, boolean expanded, boolean isleaf, int row,boolean hasfocus)
{
// 选中
if (selected)
{
setforeground(gettextselectioncolor());
}
else
{
setforeground(gettextnonselectioncolor());
}
// treenode
defaultmutabletreenode treenode = (defaultmutabletreenode) value;
object obj = treenode.getuserobject();
if (obj instanceof treenode)
{
treenode node = (treenode) obj;
defaulttreecellrenderer tempcellrenderer = new defaulttreecellrenderer();
tempcellrenderer.setleaficon(new imageicon(node.getimagepath()));
return tempcellrenderer.gettreecellrenderercomponent(tree, node.tostring(), selected, expanded, true, row, hasfocus);
}
else if (obj instanceof string)
{
string text = (string) obj;
defaulttreecellrenderer tempcellrenderer = new defaulttreecellrenderer();
tempcellrenderer.setopenicon(new imageicon("image/open.jpg"));
tempcellrenderer.setclosedicon(new imageicon("image/close.jpg"));
return tempcellrenderer.gettreecellrenderercomponent(tree, text, selected, expanded, false, row, hasfocus);
}
return super.gettreecellrenderercomponent(tree, value, selected, expanded, isleaf, row, hasfocus);
}
}
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treenodedemo.java
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package awtdemo;
import javax.swing.jframe;
import javax.swing.jtree;
import javax.swing.event.treeselectionevent;
import javax.swing.event.treeselectionlistener;
import javax.swing.tree.defaultmutabletreenode;
public class treenodedemo {
public static void main(string[] args) {
// 创建没有父节点和子节点、但允许有子节点的树节点，并使用指定的用户对象对它进行初始化。
// public defaultmutabletreenode(object userobject)
defaultmutabletreenode group1 = new defaultmutabletreenode("软件部");
treenode node1 = new treenode();
node1.setname("王雨");
node1.setnickname("漫天飞舞");
node1.setimagepath("image/1.jpg");
group1.add(new defaultmutabletreenode(node1));
treenode node2 = new treenode();
node2.setname("陈梦");
node2.setnickname("梦");
node2.setimagepath("image/2.jpg");
group1.add(new defaultmutabletreenode(node2));
treenode node3 = new treenode();
node3.setname("上官飞儿");
node3.setnickname("飞儿");
node3.setimagepath("image/3.jpg");
group1.add(new defaultmutabletreenode(node3));
defaultmutabletreenode group2 = new defaultmutabletreenode("销售部");
treenode node4 = new treenode();
node4.setname("上官婉儿");
node4.setnickname("婉儿");
node4.setimagepath("image/4.jpg");
group2.add(new defaultmutabletreenode(node4));
treenode node5 = new treenode();
node5.setname("上官巧儿");
node5.setnickname("巧儿");
node5.setimagepath("image/5.jpg");
group2.add(new defaultmutabletreenode(node5));
defaultmutabletreenode root = new defaultmutabletreenode();
root.add(group1);
root.add(group2);
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
final jtree tree = new jtree(root);
tree.setcellrenderer(new treecellrenderer());
tree.putclientproperty("jtree.linestyle", "none");
tree.setrootvisible(true);
jframe frame = new jframe("jtreedemo - www.zzvips.com");
frame.add(tree);
frame.setsize(300, 300);
frame.setvisible(true);
frame.setdefaultcloseoperation(jframe.exit_on_close);
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// 添加选择事件
tree.addtreeselectionlistener(new treeselectionlistener()
{
@override
public void valuechanged(treeselectionevent e)
{
defaultmutabletreenode node = (defaultmutabletreenode) tree.getlastselectedpathcomponent();
if (node == null){
return;
}//if
object object = node.getuserobject();
if(object instanceof treenode)
{
treenode user = (treenode) object;
system.out.println("你点击了：" + user.tostring());
}
else if(object instanceof string)
{
string text = (string)object;
system.out.println("你点击了：" + text);
}
}
});
}
}
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希望本文所述对大家java程序设计有所帮助。
原文链接：http://blog.csdn.net/sunnyyoona/article/details/46292355