import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
public class ByteDemo extends JFrame implements ActionListener {
	JPanel pnlMain;
	JLabel lblSource,lblObject;
	JButton btnOpen,btnCopy,btnbitCopy;
	JTextField txtSource,txtObject;
	JFileChooser fc;
	FileInputStream fisSource;
	FileOutputStream fosObject;
	FileReader fr;
	FileWriter fw;
	public ByteDemo()
	{
		pnlMain=new JPanel(new FlowLayout());
		setContentPane(pnlMain);
		lblSource=new JLabel("源 文 件:");
		lblObject =new JLabel("目標文件");
		txtSource=new JTextField(10);
		txtObject=new JTextField(10);
		fc=new JFileChooser();
		btnOpen=new JButton("打開");
		btnCopy=new JButton("字節復制");
		btnbitCopy=new JButton("字符復制");
		btnCopy.setEnabled(false);
		btnbitCopy.addActionListener(this);
		btnOpen.addActionListener(this);
		btnCopy.addActionListener(this);
		pnlMain.add(lblSource);
		pnlMain.add(txtSource);
		pnlMain.add(lblObject);
		pnlMain.add(txtObject);
		pnlMain.add(btnOpen);
		pnlMain.add(btnCopy);
		pnlMain.add(btnbitCopy);
		setTitle("文件復制");
		setSize(200,150);
		setVisible(true);
		
	}
	public void actionPerformed(ActionEvent ae)
	{
		if( ae.getSource().equals(btnOpen))
		{
			int intRetVal=fc.showOpenDialog(this);
			if(intRetVal==JFileChooser.APPROVE_OPTION)
			{
				txtSource.setText(fc.getSelectedFile().toString());
				String strFileName=(fc.getSelectedFile().getName());
				String strPath=(fc.getSelectedFile().getPath());
				btnCopy.setEnabled(true);
				int i=strFileName.indexOf(".");
				String str=strFileName.substring(0,i);
				str=str+"bake"+strFileName.substring(i);
				txtObject.setText(str);
				
			}
			
		}else if(ae.getSource()==btnCopy)
		{
			copyFileByte();
		}else if(ae.getSource()==btnbitCopy)
		{
			copyFilebit();
		}
	}
	public void copyFilebit()
	{
		if(!txtSource.getText().equals(null)&&!txtObject.getText().equals(null))
		{
			try
			{
				fw=new FileWriter(txtObject.getText());
				fr=new FileReader(txtSource.getText());
				int temp;
				while(fr.read()!=-1)
				{
					fw.write(fr.read());
					
				}
				JOptionPane.showMessageDialog(null, "字符方式復制成功");
				fr.close();
				fw.close();
				
			}
			catch(Exception e)
			{
				JOptionPane.showMessageDialog(null, " 復制失敗");
			}
		}
	}
	public void copyFileByte() 
	{
		if(!txtSource.getText().equals(null)&&!txtObject.getText().equals(null))
		{
			try
			{
				fisSource=new FileInputStream(txtSource.getText());
				fosObject=new FileOutputStream(txtObject.getText());
				int intTemp;
				while((intTemp=fisSource.read())!=-1)
				{
					fosObject.write(intTemp);
					
				}
				fisSource.close();
				fosObject.close();
				JOptionPane.showMessageDialog(null, "字節方式復制成功");
				
			}
			catch(Exception e)
			{
				JOptionPane.showMessageDialog(null, "沒有找到文件");
			}
		}
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new ByteDemo();
	}

}