java程序设计对文件的操作

import java.io.*;
public class Main{
    public static void main(String args []) {
        try {
            File inFile = new File("D://example.txt");
            BufferedReader bf=new BufferedReader(new FileReader(inFile));
            String c;
            String []temp=new String[100];
            int cnt=0;

            while ((c = bf.readLine())!=null)
            {
                temp[cnt]=c;
                cnt++;
            }
            bf.close();
            BufferedWriter bw=new BufferedWriter(new FileWriter(inFile));
            for(int i=cnt-1;i>=0;i--)
            {
                bw.write(temp[i]);
                bw.newLine();
            }
            bw.flush();
            bw.close();
        }catch (FileNotFoundException e) {
            System.out.println("FileStreamsTest: "+e);

        }catch(IOException e){//(5)
            System.out.println("FileStreamsTest: "+e);
        }
    }
}