filedemo.java

里面所含源码是本人平时做程序的一些实例

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("文件和文件对话框演示");
		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("打开");
		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]="上次修改时间:"+String.valueOf(modiTime);
			strTemp[1]="文件大小:"+String.valueOf(fileSize);
			strTemp[2]="是否可读:"+String.valueOf(file.canRead());
			strTemp[3]="是否可写:"+String.valueOf(file.canWrite());
			strTemp[4]="是否隐藏:"+String.valueOf(file.isHidden());
			return strTemp;
		}
		catch(Exception e)
		{
			return null;
		}
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new FileDemo();
	}

}