输入输出练习题2

package shurushuchu;
import java.io.*;
public class IoDemo {

    public static void main(String[] args) {
        
        try {
            BufferedReader br=new BufferedReader(new FileReader("d:/test.txt"));
            String s=br.readLine();
            br.close();
            System.out.println("s="+s);
            
            File f1=new File("d:/iodemo.txt");
            if(!f1.exists())
            {
                f1.createNewFile();
                System.out.println("文本创建成功");
            }
            BufferedWriter bw=new BufferedWriter(new FileWriter("d:/iodemo.txt"));
            bw.write("追加的文本");
            bw.close();
            System.out.println("写完");
        } 
        catch (Exception e) 
        {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }

    }

}