newmyio.java

来自「java code for booking system use gui」· Java 代码 · 共 28 行

import java.io.RandomAccessFile;
import java.io.*;
public class newmyio {
private	String filename;
	private small_air_craft nnn;
	public newmyio(String filename,small_air_craft nnn)
	{this.filename =filename;
	this.nnn=nnn;}
	public void writeinfo(String an,int n)throws Exception
	{
		RandomAccessFile ra=new RandomAccessFile(filename,"rw");
		ra.seek( n*20);
		
		ra.writeBytes(an);
		ra.close() ;
	}
	public void readinfo(int n)throws Exception
	{
		
		RandomAccessFile ra=new RandomAccessFile(filename,"r");
		ra.seek( n*20);
		System.out.println(ra.readLine());
		ra.close() ;
	}
	
	

}