filedemo6.java

JAVA程序设计课程中各章节的程序实例。

/**
*Pay more attention!!!
*Random access file

*/
import java.io.*;

class fileDemo6
{
	public static void main(String args[]) throws IOException
	{
		try
		{
			RandomAccessFile r1 = new RandomAccessFile("in.dat","rw");

			r1.writeShort(10);
			r1.writeInt(200);
			r1.writeDouble(30.10);
			r1.writeChar('a');
			r1.writeBoolean(true);
			r1.writeLong(111111);
			r1.writeFloat((float)111.111);

			r1.seek(0);

			System.out.println(r1.readShort());
			System.out.println(r1.readInt());
			System.out.println(r1.readDouble());
			System.out.println(r1.readChar());
			System.out.println(r1.readBoolean());
			System.out.println(r1.readLong());
			System.out.println(r1.readFloat());

			r1.close();
		}
		catch(FileNotFoundException e)
		{
			System.out.println(e.getMessage());
		}
	}
}