Java implementation file tree

You want your swingProgramDo you have a tree like a resource manager? Do I need lazy loading?

Let's look at the file tree I implemented below.Code

Public class assumertree extends jpanel {<br/> private jtree tree; <br/> private treepath; </P> <p> Public assumertree () {<br/> This. setlayout (New borderlayout (); <br/> defaultmutabletreenode root = new defaultmutabletreenode ("Explorer"); <br/> tree = new jtree (Root ); <br/> file [] Roots = file. listroots (); <br/> for (INT I = 0; I <roots. length; I ++) {<br/> defaultmutabletreenode Node = New defaultmutabletreenode (roots [I]. getpath (); <br/> root. add (node); <br/>}< br/> mouselistener ML = new mouseadapter () {<br/> Public void mousepressed (mouseevent E) {<br/> try {<br/> treepath TP = tree. getpathforlocation (E. getx (), E. gety (); <br/> If (TP! = NULL) {<br/> treepath = TP; <br/> int size = treepath. getpath (). length; <br/> stringbuffer pathname = new stringbuffer (); <br/> If (size> 0) {<br/> for (INT I = 1; I <size; I ++) {<br/> if (I> 2) {<br/> pathname. append ("//"); <br/>}< br/> pathname. append (treepath. getpath () [I]. tostring (); </P> <p >}< br/> system. out. println (pathname. tostring (); <br/> file = new file (pathname. tostring (); <br/> file [] list = file. listfiles (); <br/> for (INT I = 0; I <list. length; I ++) {<br/> string [] strings = list [I]. getpath (). split ("//"); <br/> defaultmutabletreenode node = new defaultmutabletreenode (strings [Strings. length-1]); <br/> (defaultmutabletreenode) TP. getlastpathcomponent ()). add (node); <br/>}< br/>}catch (exception E1) {<br/> system. out. println ("can not open"); <br/>}< br/>}; <br/> tree. addmouselistener (ML); <br/> tree. setshowsroothandles (true); <br/> tree. setrootvisible (true); <br/> jscrollpane scrpane = new jscrollpane (tree); <br/> Add (scrpane ); <br/>}</P> <p> Public static void main (string [] ARGs) {<br/> jframe = new jframe ("Explorer "); <br/> jframe. setlayout (New borderlayout (); <br/> jframe. add (New assumertree (); <br/> jframe. setdefaclocloseoperation (jframe. exit_on_close); <br/> jframe. setsize (300,700); <br/> jframe. setvisible (true); <br/>}< br/>}

I have been busy recently. If I don't have time to write a blog, I will use some code to show my ugliness.