[Java] Swing tree-shaped component JTree

A simple style

Treenodedemo.java

 PackageCOM.SJF;ImportJavax.swing.JFrame;ImportJavax.swing.JTree;ImportJavax.swing.event.TreeSelectionEvent;ImportJavax.swing.event.TreeSelectionListener;ImportJavax.swing.tree.DefaultMutableTreeNode; Public  class treenodedemo {     Public Static void Main(string[] args) {//Create a tree node with no parent and child nodes, but allow child nodes, and initialize it with the specified user object.         //Public Defaultmutabletreenode (Object UserObject)Defaultmutabletreenode group1 =NewDefaultmutabletreenode ("Software Department"); TreeNode Node1 =NewTreeNode (); Node1.setname ("Wangyu Lotus"); Node1.setnickname ("Flying in the Sky"); Group1.add (NewDefaultmutabletreenode (Node1)); TreeNode Node2 =NewTreeNode (); Node2.setname ("Mengjia"); Node2.setnickname ("Dream"); Group1.add (NewDefaultmutabletreenode (Node2)); TreeNode Node3 =NewTreeNode (); Node3.setname ("Officer Fei er"); Node3.setnickname ("Fei er"); Group1.add (NewDefaultmutabletreenode (NODE3)); Defaultmutabletreenode group2 =NewDefaultmutabletreenode ("Sales Department"); TreeNode node4 =NewTreeNode (); Node4.setname ("The officer Wan Son"); Node4.setnickname ("Wan er"); Group2.add (NewDefaultmutabletreenode (NODE4)); TreeNode NODE5 =NewTreeNode (); Node5.setname ("Upper Nathar"); Node5.setnickname ("Qiao Son"); Group2.add (NewDefaultmutabletreenode (NODE5)); Defaultmutabletreenode top =NewDefaultmutabletreenode ("Staff Management");        Top.add (group1); Top.add (group2);FinalJTree tree =NewJTree (top); JFrame f =NewJFrame ("Jtreedemo");        F.add (tree); F.setsize ( -, -); F.setvisible (true); F.setdefaultcloseoperation (Jframe.exit_on_close);//Add Selection EventsTree.addtreeselectionlistener (NewTreeselectionlistener () {@Override             Public void valuechanged(Treeselectionevent e) {Defaultmutabletreenode node = (defaultmutabletreenode) tree.getlastselectedpathcomponent ();if(node = =NULL){return; }//ifObject object = Node.getuserobject ();                TreeNode user = (TreeNode) object; System.out.println ("You have chosen:"+ user.tostring ());    }        }); }}

Treenode.java

Package COM.SJF; Public classTreeNode {PrivateString nickname ="";PrivateString name ="";PrivateString phone ="";Private intAge PublicStringGetName() {returnName } Public void SetName(String name) { This. name = name; } PublicStringGetnickname() {returnNickname; } Public void Setnickname(String nickname) { This. nickname = nickname; } PublicStringGetphone() {returnPhone } Public void Setphone(String phone) { This. phone = phone; } Public int Getage() {returnAge } Public void Setage(intAge) { This. Age = Age; }//Focus on ToString, the display text of the node is ToString     PublicStringtoString()    {returnName +"["+nickname+"]"; }}

Two icon Styles

Treenode.java

Package COM.SJF; Public classTreeNode {PrivateString nickname ="";PrivateString name ="";PrivateString phone ="";Private intAgePrivateString ImagePath =""; PublicStringGetimagepath() {returnImagePath; } Public void setImagePath(String ImagePath) { This. ImagePath = ImagePath; } PublicStringGetName() {returnName } Public void SetName(String name) { This. name = name; } PublicStringGetnickname() {returnNickname; } Public void Setnickname(String nickname) { This. nickname = nickname; } PublicStringGetphone() {returnPhone } Public void Setphone(String phone) { This. phone = phone; } Public int Getage() {returnAge } Public void Setage(intAge) { This. Age = Age; }//Focus on ToString, the display text of the node is ToString     PublicStringtoString()    {returnName +"["+nickname+"]"; }}

Treecellrenderer.java

 PackageCOM.SJF;ImportJava.awt.Component;ImportJavax.swing.ImageIcon;ImportJavax.swing.JTree;ImportJavax.swing.tree.DefaultMutableTreeNode;ImportJavax.swing.tree.DefaultTreeCellRenderer;/** * Custom Tree Description class, set each node of the tree to a different icon * * / Public  class treecellrenderer extends defaulttreecellrenderer{    Private Static Final LongSerialversionuid =1L/** * Method of overriding parent class Defaulttreecellrenderer * /    @Override     PublicComponentgettreecellrenderercomponent(JTree tree, Object value,BooleanSelectedBooleanExpandedBooleanIsLeaf,intRowBooleanHasfocus) {//Selected        if(selected)        {Setforeground (Gettextselectioncolor ()); }Else{Setforeground (Gettextnonselectioncolor ()); }//TreeNodeDefaultmutabletreenode TreeNode = (defaultmutabletreenode) value; Object obj = Treenode.getuserobject ();if(objinstanceofTreeNode) {TreeNode node = (TreeNode) obj; Defaulttreecellrenderer Tempcellrenderer =NewDefaulttreecellrenderer (); Tempcellrenderer.setleaficon (NewImageIcon (Node.getimagepath ()));returnTempcellrenderer.gettreecellrenderercomponent (tree, Node.tostring (), selected, expanded,true, row, Hasfocus); }Else if(objinstanceofString) {String text = (string) obj; Defaulttreecellrenderer Tempcellrenderer =NewDefaulttreecellrenderer (); Tempcellrenderer.setopenicon (NewImageIcon ("Image/open.jpg")); Tempcellrenderer.setclosedicon (NewImageIcon ("Image/close.jpg"));returnTempcellrenderer.gettreecellrenderercomponent (tree, text, selected, expanded,false, row, Hasfocus); }return Super. gettreecellrenderercomponent (tree, value, selected, expanded, isleaf, row, hasfocus); }}

Treenodedemo.java

Package Com.sjf;import Javax.swing.jframe;import Javax.swing.jtree;import javax.swing.Event. Treeselectionevent;import javax.swing.Event. Treeselectionlistener;import Javax.swing.tree.DefaultMutableTreeNode; Public classTreenodedemo { Public Static void Main(string[] args) {//Create a tree node with no parent and child nodes, but allow child nodes, and initialize it with the specified user object.         //Public Defaultmutabletreenode (Object UserObject)Defaultmutabletreenode group1 =NewDefaultmutabletreenode ("Software Department"); TreeNode Node1 =NewTreeNode (); Node1.setname ("Wangyu Lotus"); Node1.setnickname ("Flying in the Sky"); Node1.setimagepath ("Image/1.jpg"); Group1.add (NewDefaultmutabletreenode (Node1)); TreeNode Node2 =NewTreeNode (); Node2.setname ("Mengjia"); Node2.setnickname ("Dream"); Node2.setimagepath ("Image/2.jpg"); Group1.add (NewDefaultmutabletreenode (Node2)); TreeNode Node3 =NewTreeNode (); Node3.setname ("Officer Fei er"); Node3.setnickname ("Fei er"); Node3.setimagepath ("Image/3.jpg"); Group1.add (NewDefaultmutabletreenode (NODE3)); Defaultmutabletreenode group2 =NewDefaultmutabletreenode ("Sales Department"); TreeNode node4 =NewTreeNode (); Node4.setname ("The officer Wan Son"); Node4.setnickname ("Wan er"); Node4.setimagepath ("Image/4.jpg"); Group2.add (NewDefaultmutabletreenode (NODE4)); TreeNode NODE5 =NewTreeNode (); Node5.setname ("Upper Nathar"); Node5.setnickname ("Qiao Son"); Node5.setimagepath ("Image/5.jpg"); Group2.add (NewDefaultmutabletreenode (NODE5)); Defaultmutabletreenode root =NewDefaultmutabletreenode ();        Root.add (group1); Root.add (group2);//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++Final JTree tree =NewJTree (root); Tree.setcellrenderer (NewTreecellrenderer ()); Tree.putclientproperty ("Jtree.linestyle","None"); Tree.setrootvisible (false); JFrame frame =NewJFrame ("Jtreedemo");        Frame.add (tree); Frame.setsize ( -, -); Frame.setvisible (true); Frame.setdefaultcloseoperation (Jframe.exit_on_close);//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++        //Add Selection EventsTree.addtreeselectionlistener (NewTreeselectionlistener () {@Override Public void valuechanged(Treeselectionevent e) {Defaultmutabletreenode node = (defaultmutabletreenode) tree.getlastselectedpathcomponent ();if(node = =NULL){return; }//ifObjectObject= Node.getuserobject ();if(Objectinstanceof TreeNode) {TreeNode user = (TreeNode)Object; System. out. println ("You clicked on:"+ user.tostring ()); }Else if(ObjectInstanceof string) {string text = (string)Object; System. out. println ("You clicked on:"+ text);    }            }        }); }}

[Java] Swing tree-shaped component JTree