【40分】帮我修改下JAVA程序。。。拜托
我想做个文件管理器，在输入框里输入路径就在下面的表格里显示该文件夹的文件，以及信息。但是显示不了 啊，谁能帮我看看，40分拜托下。。。
- Java code
package cn.mrpmh.bao;import javax.swing.*;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.*;import java.text.SimpleDateFormat;import java.util.Date;//文件管理public class jtable { JTable table; String[] columnName; JLabel xinxi; File[] fileslist; int photo=0,audio=0,video=0,txt=0; JTextField lujin; String lujinvalue="C:\\Users\\Administrator\\Pictures"; JButton go; JButton open; JFrame win; JScrollPane scroll; public void window(String title) { win=new JFrame(title); win.setIconImage(Toolkit.getDefaultToolkit().createImage("file/image/icon.png")); tool(); init(); win.setSize(600,400); win.setLocation(300,100); win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); win.setVisible(true); } private void tool() { JToolBar tools=new JToolBar(); lujin=new JTextField(lujinvalue,15); go=new JButton("转到"); open=new JButton("打开"); tools.add(lujin); tools.add(go); tools.add(open); go.addActionListener(new Shijian()); open.addActionListener(new Shijian()); win.getContentPane().add(tools,BorderLayout.NORTH); } private String[][] files() { File file=new File(lujinvalue); fileslist=file.listFiles(); //获取文件数组 String[][] getfile=new String[fileslist.length][fileslist.length]; //定义字符串数组 for(int i=0;i<fileslist.length;i++) //遍历数组 { if(fileslist[i].getName().endsWith("jpg")||fileslist[i].getName().endsWith("gif")||fileslist[i].getName().endsWith("png")|| fileslist[i].getName().endsWith("bmp")) photo++; if(fileslist[i].getName().endsWith("mp3")||fileslist[i].getName().endsWith("wav")||fileslist[i].getName().endsWith("wma")|| fileslist[i].getName().endsWith("mid")) audio++; if(fileslist[i].getName().endsWith("mp4")||fileslist[i].getName().endsWith("3gp")||fileslist[i].getName().endsWith("avi")|| fileslist[i].getName().endsWith("flv")||fileslist[i].getName().endsWith("f4v")||fileslist[i].getName().endsWith("rm")|| fileslist[i].getName().endsWith("rmvb")||fileslist[i].getName().endsWith("wmv")) video++; if(fileslist[i].getName().endsWith("txt")) txt++; for(int j=0;j<4;j++) { getfile[i][0]=fileslist[i].getName(); //文件名 getfile[i][1]=fileslist[i].toString(); //路径 getfile[i][2]=Integer.toString(((int)fileslist[i].length())); //文件大小 getfile[i][3]=(new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss")).format(new Date( fileslist[i].lastModified())); } } return getfile; } private void init() { columnName=new String[]{"文件名","路径","大小(B)","最后修改时间"}; table=new JTable(files(),columnName); scroll=new JScrollPane(table); win.getContentPane().add(scroll,BorderLayout.CENTER); xinxi=new JLabel("本目录共【"+fileslist.length+"】个文件: 图片【"+photo+"】，音频【"+audio+"】，视频【"+video+"】，txt文本【"+txt+"】"); xinxi.setFont(new Font("",Font.PLAIN,12)); win.getContentPane().add(xinxi,BorderLayout.SOUTH); } public class Shijian implements ActionListener { public void actionPerformed(ActionEvent e) { if(e.getSource()==go) { File file=new File(lujin.getText()); if(file.exists()) { lujinvalue=lujin.getText(); new Thread(new shuaxin()).start(); } else JOptionPane.showMessageDialog(null,"路径不存在！","提示",0); } if(e.getSource()==open) { FileDialog openfile=new FileDialog(new JFrame(),"打开",FileDialog.LOAD); openfile.setVisible(true); if(openfile.getFile()!=null) { lujinvalue=openfile.getDirectory();//+openfile.getFile(); lujin.setText(lujinvalue); } } } } class shuaxin implements Runnable { public void run() { table=new JTable(files(),columnName); scroll=new JScrollPane(table); } } public static void main(String[] args) { new jtable().window("文件管理器"); }}
[解决办法]
你的程序初始能正确显示，但点‘转到’不会刷新列表，帮你改正了，并且修改了数组会越界的BUG，下列代码你测试可用。
- Java code
package test;import java.awt.BorderLayout;import java.awt.FileDialog;import java.awt.Font;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.File;import java.text.SimpleDateFormat;import java.util.Date;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JScrollPane;import javax.swing.JTable;import javax.swing.JTextField;import javax.swing.JToolBar;public class jtable { private JTable table; private String[] columnName; private JLabel xinxi; private File[] fileslist; private int photo = 0; private int audio = 0; private int video = 0; private int txt = 0; private JTextField lujin; private String lujinvalue = "C:\\Program Files\\Java\\jdk1.6.0_21\\bin"; private JButton go; private JButton open; private JFrame win; private JScrollPane scroll; public void window(String title) { win = new JFrame(title); win.setIconImage(Toolkit.getDefaultToolkit().createImage( "file/image/icon.png")); tool(); init(); win.setSize(600, 400); win.setLocation(300, 100); win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); win.setVisible(true); } private void tool() { JToolBar tools = new JToolBar(); lujin = new JTextField(lujinvalue, 15); go = new JButton("转到"); open = new JButton("打开"); tools.add(lujin); tools.add(go); tools.add(open); go.addActionListener(new Shijian(this)); open.addActionListener(new Shijian(this)); win.getContentPane().add(tools, BorderLayout.NORTH); } private String[][] files() { File file = new File(lujinvalue); System.out.println(lujinvalue); fileslist = file.listFiles(); // 获取文件数组 System.out.println(fileslist.length); [color=#FF0000]String[][] getfile = new String[fileslist.length][4]; // 定义字符串数组,定义为4列[/color] for (int i = 0; i < fileslist.length; i++) // 遍历数组 { if (fileslist[i].getName().endsWith("jpg") || fileslist[i].getName().endsWith("gif") || fileslist[i].getName().endsWith("png") || fileslist[i].getName().endsWith("bmp")) photo++; if (fileslist[i].getName().endsWith("mp3") || fileslist[i].getName().endsWith("wav") || fileslist[i].getName().endsWith("wma") || fileslist[i].getName().endsWith("mid")) audio++; if (fileslist[i].getName().endsWith("mp4") || fileslist[i].getName().endsWith("3gp") || fileslist[i].getName().endsWith("avi") || fileslist[i].getName().endsWith("flv") || fileslist[i].getName().endsWith("f4v") || fileslist[i].getName().endsWith("rm") || fileslist[i].getName().endsWith("rmvb") || fileslist[i].getName().endsWith("wmv")) video++; if (fileslist[i].getName().endsWith("txt")) txt++; for (int j = 0; j < 4; j++) { getfile[i][0] = fileslist[i].getName(); // 文件名 getfile[i][1] = fileslist[i].toString(); // 路径 getfile[i][2] = Integer.toString(((int) fileslist[i].length())); // 文件大小 getfile[i][3] = (new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")) .format(new Date(fileslist[i].lastModified())); } } return getfile; } private void init() { columnName = new String[] { "文件名", "路径", "大小(B)", "最后修改时间" }; table = new JTable(this.files(), columnName); scroll = new JScrollPane(table); win.getContentPane().add(scroll, BorderLayout.CENTER); xinxi = new JLabel("本目录共【" + fileslist.length + "】个文件: 图片【" + photo + "】，音频【" + audio + "】，视频【" + video + "】，txt文本【" + txt + "】"); xinxi.setFont(new Font("", Font.PLAIN, 12)); win.getContentPane().add(xinxi, BorderLayout.SOUTH); } public class Shijian implements ActionListener { private jtable jtable; Shijian(jtable jtable) { this.jtable = jtable; } public void actionPerformed(ActionEvent e) { if (e.getSource() == go) { File file = new File(lujin.getText()); if (file.exists()) { lujinvalue = lujin.getText(); new Thread(new shuaxin(jtable)).start(); } else JOptionPane.showMessageDialog(null, "路径不存在！", "提示", 0); } if (e.getSource() == open) { FileDialog openfile = new FileDialog(new JFrame(), "打开", FileDialog.LOAD); openfile.setVisible(true); if (openfile.getFile() != null) { lujinvalue = openfile.getDirectory();// +openfile.getFile(); lujin.setText(lujinvalue); } } } } class shuaxin implements Runnable { private jtable jtable; shuaxin(jtable jtable) { this.jtable = jtable; } public void run() { jtable.window("文件管理器"); } } public static void main(String[] args) { new jtable().window("文件管理器"); }}