randomaccessfiledemo.java

来自「本java源程序包括了大量的学习程序（共27章）方便大家学习」· Java 代码 · 共 35 行

import java.io.*;
class RandomAccessFileDemo
{
  public static void main(String argv[])
  {
    try
    {
      int w_data = 54321;
      RandomAccessFile file1 = new RandomAccessFile("datafile.dat","rw");
      file1.writeLong(123456789);
      file1.writeInt(w_data);
      file1.writeUTF("This is java code");
      System.out.println("Write Success");
    }
    catch(FileNotFoundException e){}
    catch(IOException e){}
    try
    {
      int r_data = 0;
      long long_data = 0;
      String UTF_data = null;
      RandomAccessFile file2 = new RandomAccessFile("datafile.dat","r");
      long_data = file2.readLong();
      r_data = file2.readInt();
      UTF_data = file2.readUTF();
      file2.close();
      System.out.println("The long data is:"+long_data);
      System.out.println("The int data is:"+r_data);
      System.out.println("The UTF data is:"+UTF_data);
    }
    catch(FileNotFoundException e){}
    catch(IOException e){}
  }
}