Folder Explorer in Java with Source Code: We can develop Folder Explorer in java with the help of IO Stream, AWT/Swing with event handling. Let's see the code of creating Folder Explorer in java.
- import java.io.*;
- import java.awt.*;
- import java.awt.event.*;
- import javax.swing.*;
- import javax.swing.tree.*;
- /***********************************/
- class Explorer extends JPanel implements ActionListener
- {
- JTextField jtf;
- JTextArea jta;
- JTree tree;
- JButton refresh;
- JTable jtb;
- JScrollPane jsp;
- JScrollPane jspTable;
- String currDirectory=null;
- final String[] colHeads={"File Name","SIZE(in Bytes)","Read Only","Hidden"};
- String[][]data={{"","","","",""}};
- /////////////////////////////////
- Explorer(String path)
- {
- jtf=new JTextField();
- jta=new JTextArea(5,30);
- refresh=new JButton("Refresh");
- File temp=new File(path);
- DefaultMutableTreeNode top=createTree(temp);
- //if(top!=null)
- tree=new JTree(top);
- jsp=new JScrollPane(tree);
- final String[] colHeads={"File Name","SIZE(in Bytes)","Read Only","Hidden"};
- String[][]data={{"","","","",""}};
- jtb=new JTable(data, colHeads);
- jspTable=new JScrollPane(jtb);
- setLayout(new BorderLayout());
- add(jtf,BorderLayout.NORTH);
- add(jsp,BorderLayout.WEST);
- add(jspTable,BorderLayout.CENTER);
- add(refresh,BorderLayout.SOUTH);
- tree.addMouseListener(
- new MouseAdapter()
- {
- public void mouseClicked(MouseEvent me)
- {
- doMouseClicked(me);
- }
- });
- jtf.addActionListener(this);
- refresh.addActionListener(this);
- }
- ///////////////////////////////
- public void actionPerformed(ActionEvent ev)
- {
- File temp=new File(jtf.getText());
- DefaultMutableTreeNode newtop=createTree(temp);
- if(newtop!=null)
- tree=new JTree(newtop);
- remove(jsp);
- jsp=new JScrollPane(tree);
- setVisible(false);
- add(jsp,BorderLayout.WEST);
- tree.addMouseListener(
- new MouseAdapter()
- {
- public void mouseClicked(MouseEvent me)
- {
- doMouseClicked(me);
- }
- });
- setVisible(true);
- }
- //////////////////////////////
- DefaultMutableTreeNode createTree(File temp)
- {
- DefaultMutableTreeNode top=new DefaultMutableTreeNode(temp.getPath());
- if(!(temp.exists() && temp.isDirectory()))
- return top;
- fillTree(top,temp.getPath());
- return top;
- }
- //////////////////////////////
- void fillTree(DefaultMutableTreeNode root, String filename)
- {
- File temp=new File(filename);
- if(!(temp.exists() && temp.isDirectory()))
- return;
- //System.out.println(filename);
- File[] filelist=temp.listFiles();
- for(int i=0; i<filelist.length; i++)
- {
- if(!filelist[i].isDirectory())
- continue;
- final DefaultMutableTreeNode tempDmtn=new DefaultMutableTreeNode(filelist[i].getName());
- root.add(tempDmtn);
- final String newfilename=new String(filename+"\\"+filelist[i].getName());
- Thread t=new Thread()
- {
- public void run()
- {
- fillTree(tempDmtn,newfilename);
- }//run
- };//thread
- if(t==null)
- {System.out.println("no more thread allowed "+newfilename);return;}
- t.start();
- }//for
- }//function
- //////////////////////////////
- void doMouseClicked(MouseEvent me)
- {
- TreePath tp=tree.getPathForLocation(me.getX(),me.getY());
- if(tp==null) return;
- //jtf.setText(tp.toString());
- String s=tp.toString();
- s=s.replace("[","");
- s=s.replace("]","");
- s=s.replace(", ","\\");
- //s=s.replace(" ","");
- //int z=s.lastIndexOf("\"\\\"");
- //s="\'"+s; s=s+"\'";
- jtf.setText(s);
- showFiles(s);
- //java.util.StringTokenizer st=new java.util.StringTokenizer(s,",");
- //jtf.setText(jtf.getText()+"="+s);
- }
- ////////////////////////////////
- void showFiles(String filename)
- {
- File temp=new File(filename);
- data=new String[][]{{"","","",""}};
- remove(jspTable);
- jtb=new JTable(data, colHeads);
- jspTable=new JScrollPane(jtb);
- setVisible(false);
- add(jspTable,BorderLayout.CENTER);
- setVisible(true);
- if(!temp.exists()) return;
- if(!temp.isDirectory()) return;
- //System.out.println(filename);
- File[] filelist=temp.listFiles();
- int fileCounter=0;
- data=new String[filelist.length][4];
- for(int i=0; i<filelist.length; i++)
- {
- if(filelist[i].isDirectory())
- continue;
- data[fileCounter][0]=new String(filelist[i].getName());
- data[fileCounter][1]=new String(filelist[i].length()+"");
- data[fileCounter][2]=new String(!filelist[i].canWrite()+"");
- data[fileCounter][3]=new String(filelist[i].isHidden()+"");
- fileCounter++;
- }//for
- String dataTemp[][]=new String[fileCounter][4];
- for(int k=0; k<fileCounter; k++)
- dataTemp[k]=data[k];
- data=dataTemp;
- //System.out.println(data);
- remove(jspTable);
- jtb=new JTable(data, colHeads);
- jspTable=new JScrollPane(jtb);
- setVisible(false);
- add(jspTable,BorderLayout.CENTER);
- setVisible(true);
- }
- ////////////////////////////////
- ///////////////////////////////
- }
- /***********************************/
- class ExplorerTest extends JFrame
- {
- ExplorerTest(String path)
- {
- super("Windows Exploder - Javatpoint");
- add(new Explorer(path),"Center");
- setDefaultCloseOperation(EXIT_ON_CLOSE);
- setSize(400,400);
- setVisible(true);
- }
- public static void main(String[] args)
- {
- new ExplorerTest(".");
- }
- }
- /***********************************/
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