자바 코드 영타 연습

import java.awt.BorderLayout;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.GridLayout;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.BufferedOutputStream;

import java.io.BufferedReader;

import java.io.DataOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.FileReader;

import java.io.IOException;

import java.util.Date;

import java.util.StringTokenizer;

import java.util.Vector;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JList;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JSplitPane;

import javax.swing.JTextArea;

import javax.swing.JTree;

import javax.swing.UIManager;

import javax.swing.event.TreeExpansionEvent;

import javax.swing.event.TreeWillExpandListener;

import javax.swing.tree.DefaultMutableTreeNode;

import javax.swing.tree.TreePath;

class Search extends JFrame implements TreeWillExpandListener, ActionListener {

    private Container con;

    private JSplitPane sp = new JSplitPane();

    private JSplitPane sp1 = new JSplitPane(JSplitPane.VERTICAL_SPLIT);

    private DefaultMutableTreeNode root = new DefaultMutableTreeNode("My 탐색기");

    private JTree tree_jt = new JTree(root);

    private JScrollPane tree_jsp = new JScrollPane(tree_jt);

    private Vector view_vc = new Vector();

    private JList view_li = new JList(view_vc);

    private JScrollPane view_jsp = new JScrollPane(view_li);

    private JButton view_bt = new JButton("VIEW");

    private JButton edit_bt = new JButton("EDIT");

    private JButton del_bt = new JButton("DELETE");

    private JButton end_bt = new JButton("EXIT");

    private JTextArea data_ta = new JTextArea();

    private JScrollPane data_jsp = new JScrollPane(data_ta);

    private Dimension screen;

    public Search() {

        super("My 탐색기");

        screen = Toolkit.getDefaultToolkit().getScreenSize();

        this.init();

        this.start();

        this.setSize((int) screen.getWidth(), (int) screen.getHeight());

        this.setLocation(0, 0);

        this.setVisible(true);

    }

    public void init() {

        con = this.getContentPane();

        con.setLayout(new BorderLayout());

        con.add("Center", sp);

        tree_jsp.setPreferredSize(new Dimension(200, (int) screen.getHeight()));

        sp.setLeftComponent(tree_jsp);

        JPanel jp = new JPanel(new BorderLayout());

        view_jsp.setPreferredSize(new Dimension((int) screen.getWidth() - 220, 300));

        jp.add("Center", view_jsp);

        JPanel jp1 = new JPanel(new GridLayout(1, 4, 5, 5));

        jp1.add(view_bt);

        jp1.add(edit_bt);

        jp1.add(del_bt);

        jp1.add(end_bt);

        jp.add("South", jp1);

        sp1.setTopComponent(jp);

        sp1.setBottomComponent(data_jsp);

        sp.setRightComponent(sp1);

        File[] file = File.listRoots();

        for (int i = 0; i < file.length; i++) {

            DefaultMutableTreeNode dmt = new DefaultMutableTreeNode(file[i]);

            dmt.add(new DefaultMutableTreeNode("EMPTY"));

            root.add(dmt);

        }

    }

    public void start() {

        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        tree_jt.addTreeWillExpandListener(this);

        view_bt.addActionListener(this);

        edit_bt.addActionListener(this);

        del_bt.addActionListener(this);

        end_bt.addActionListener(this);

    }

    public void actionPerformed(ActionEvent e) {

        if (e.getSource() == view_bt) {

            TreePath tp = tree_jt.getSelectionPath();

            // System.out.println("tp = " + tp);

            StringTokenizer stk = new StringTokenizer(tp.toString(), "[,]");

            stk.nextToken();

            if (stk.hasMoreTokens()) {

                String filepath = stk.nextToken().trim();

                while (stk.hasMoreTokens()) {

                    filepath += stk.nextToken().trim() + "/";

                }

                String filename = (String) view_li.getSelectedValue();

                filename = filename.substring(0, filename.indexOf("(")).trim();

                File f = new File(filepath, filename);

                try {

                    BufferedReader in = new BufferedReader(new FileReader(f));

                    data_ta.setText("");

                    while (true) {

                        String str = in.readLine();

                        if (str == null)

                            break;

                        data_ta.append(str + "\n");

                    }

                    in.close();

                } catch (IOException ee) {

                }

            }

        } else if (e.getSource() == edit_bt) {

            TreePath tp = tree_jt.getSelectionPath();

            // System.out.println("tp = " + tp);

            StringTokenizer stk = new StringTokenizer(tp.toString(), "[,]");

            stk.nextToken();

            if (stk.hasMoreTokens()) {

                String filepath = stk.nextToken().trim();

                while (stk.hasMoreTokens()) {

                    filepath += stk.nextToken().trim() + "/";

                }

                String filename = (String) view_li.getSelectedValue();

                filename = filename.substring(0, filename.indexOf("(")).trim();

                File f = new File(filepath, filename);

                int xx = JOptionPane.showConfirmDialog(this, "정말 수정하시겠습니까?", "수정", JOptionPane.YES_NO_OPTION,

JOptionPane.QUESTION_MESSAGE);

                if (xx == 0) {

                    try {

                        DataOutputStream dos = new DataOutputStream(

                            new BufferedOutputStream(

                                new FileOutputStream(f)));

                        byte[] data = data_ta.getText().trim().getBytes();

                        dos.write(data);

                        dos.close();

                    } catch (IOException ee) {

                    }

                }

            }

        } else if (e.getSource() == del_bt) {

            TreePath tp = tree_jt.getSelectionPath();

            // System.out.println("tp = " + tp);

            StringTokenizer stk = new StringTokenizer(tp.toString(), "[,]");

            stk.nextToken();

            if (stk.hasMoreTokens()) {

                String filepath = stk.nextToken().trim();

                while (stk.hasMoreTokens()) {

                    filepath += stk.nextToken().trim() + "/";

                }

                String filename = (String) view_li.getSelectedValue();

                filename = filename.substring(0, filename.indexOf("(")).trim();

                File f = new File(filepath, filename);

                int xx = JOptionPane.showConfirmDialog(this, "정말 삭제하시겠습니까?",

                    "삭제", JOptionPane.YES_NO_OPTION,

                    JOptionPane.QUESTION_MESSAGE);

                if (xx == 0) {

                    f.delete();

                    view_vc.clear();

                    view_li.setListData(view_vc);

                    data_ta.setText("");

                }

            }

        } else if (e.getSource() == end_bt) {

            System.exit(0);

        }

    }

    public void treeWillExpand(TreeExpansionEvent e) {

        if (e.getSource() == tree_jt) {

            tree_jt.setSelectionPath(e.getPath());

            TreePath tp = tree_jt.getSelectionPath();

            // System.out.println("tp = " + tp);

            StringTokenizer stk = new StringTokenizer(tp.toString(), "[,]");

            System.out.println(stk);

            stk.nextToken();

            if (stk.hasMoreTokens()) {

                String filepath = stk.nextToken().trim();

                while (stk.hasMoreTokens()) {

                    filepath += stk.nextToken().trim() + "/";

                }

                // System.out.println("file = " + filepath);

                File dir = new File(filepath);

                File[] data = dir.listFiles();

                if (data == null) {

                    return;

                }

                DefaultMutableTreeNode imsi = (DefaultMutableTreeNode) e.getPath().getLastPathComponent();

                imsi.removeAllChildren();

                view_vc.clear();

                if (data.length == 0) {

                    imsi.add(new DefaultMutableTreeNode("EMPTY"));

                } else {

                    int count = -1;

                    for (int i = 0; i < data.length; i++) {

                        if (data[i].isDirectory()) {

                            DefaultMutableTreeNode dtm = new DefaultMutableTreeNode(data[i].getName());

                            dtm.add(new DefaultMutableTreeNode("EMPTY"));

                            imsi.add(dtm);

                            count++;

                        } else {

                            view_vc.add(data[i].getName() + " (" + data[i].length() + "byte, " + new Date(data[i].lastModified()) + ")");

                        }

                    }

                    if (count == -1) {

                        imsi.add(new DefaultMutableTreeNode("EMPTY"));

                    }

                }

                view_li.setListData(view_vc);

            }

        }

    }

    public void treeWillCollapse(TreeExpansionEvent e) {}

}

public class SaerchFileUpdate {

    public static void main(String[] args) {

        try {

            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

        } catch (Exception ee) {

        }

        Search ws = new Search();

    }

}