?? filedemo.java
字號(hào):
package notepad;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.TextArea;
import javax.swing.*;
import java.io.*;
public class FileDemo extends JFrame implements ActionListener {
JPanel pnlMain;
JButton btnOpen;
JFileChooser fc;
TextArea taFileInfo;
JLabel lblFile;
JTextField txtFile;
public FileDemo()
{
super("文件和文件對(duì)話框演示");
fc=new JFileChooser();
pnlMain=new JPanel();
taFileInfo=new TextArea(6,36);
taFileInfo.setEditable(false);
lblFile=new JLabel("文件:");
txtFile=new JTextField(16);
btnOpen=new JButton("打開");
btnOpen.addActionListener(this);
setContentPane(pnlMain);
pnlMain.add(taFileInfo);
pnlMain.add(lblFile);
pnlMain.add(txtFile);
pnlMain.add(btnOpen);
setSize(300,200);
setVisible(true);
}
public void actionPerformed(ActionEvent ae)
{
if(ae.getSource()==btnOpen)
{
int intRetVal=fc.showOpenDialog(this);
if(intRetVal==JFileChooser.APPROVE_OPTION)
{
txtFile.setText(fc.getSelectedFile().toString());
String []fileAttr=getFileAttr(txtFile.getText());
for(int i=0;i<fileAttr.length;i++)
taFileInfo.append(fileAttr[i]+"\n");
}
}
}
public String[]getFileAttr(String strName)
{
try
{
File file=new File(strName);
long modiTime=file.lastModified();
long fileSize=file.length();
String []strTemp=new String[5];
strTemp[0]="上次修改時(shí)間:"+String.valueOf(modiTime);
strTemp[1]="文件大小:"+String.valueOf(fileSize);
strTemp[2]="是否可讀:"+String.valueOf(file.canRead());
strTemp[3]="是否可寫:"+String.valueOf(file.canWrite());
strTemp[4]="是否隱藏:"+String.valueOf(file.isHidden());
return strTemp;
}
catch(Exception e)
{
return null;
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
new FileDemo();
}
}
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