Java 輸入輸出流（一）

package ni;
import java.io.*;

public class Exp {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		String s;
		try
		{
			FileReader rf=new FileReader("G:b.txt");
			BufferedReader br=new BufferedReader(rf);
			FileWriter wf=new FileWriter("F:b.txt");
			BufferedWriter bw=new BufferedWriter(wf);
			while((s=br.readLine())!=null)
			{
				bw.write(s);
				bw.newLine();
			}
			bw.close();
			wf.close();
			
			br.close();
			rf.close();
			FileReader rf1=new FileReader("F:b.txt");
			BufferedReader br1=new BufferedReader(rf1);
			while((s=br1.readLine())!=null)
				System.out.println(s);
			br1.close();
			rf1.close();
		}
		catch(IOException e){
			System.out.println(e);
		}
		catch(Exception e){
			System.out.println(e);
		}
	}
}