数据I/O

package filefile;

import java.io.*;

public class NewFile {

    public static void main(String[] args)  {
        try {
            String str = "122345abcdef@#%&*软件工程";
            File f1 = new File("data.txt");
            f1.createNewFile();
            FileWriter w1 = new FileWriter(f1);
            BufferedWriter b1 = new BufferedWriter(w1);
            b1.write(str);
            b1.close();
            w1.close();
            FileReader w2 = new FileReader(f1);
            BufferedReader b2 = new BufferedReader(w2);
            long length = f1.length();
            String path = f1.getAbsolutePath();
            System.out.println(length);
            System.out.println(path);
            System.out.println(f1.isFile());
            System.out.println(b2.readLine());

        }catch(Exception e) {
            e.printStackTrace();
        }
        
    }

}