日期:2014-05-20 浏览次数:20749 次
import java.io.IOException; import java.io.RandomAccessFile; /** * 编写一个Java应用程序,利用RandomAccessFile类,把几个int型整数(1,2,3,4,5,6,7,8,9,10)写入到一个名字为tom. * dat文件中,然后按相反顺序读出这些数据并显示在屏幕上。(注意,一个int型数据占4个字节) * */ public class Demo { private static final String PATH = "tom.dat"; private static final int LENGTH = 10; private static final int INT_LENGTH = 4; public static void main(String[] args) { System.out.println("写进去的数:"); write(); System.out.println(); System.out.println("写好了。。。"); System.out.println("读出来的数据:"); read(); } private static void write() { RandomAccessFile raf = null; try { raf = new RandomAccessFile(PATH, "rw"); for(int i = 0; i < LENGTH; i ++) { System.out.print(i + "\t"); raf.writeInt(i); } } catch (IOException e) { e.printStackTrace(); } finally { try { if (null != raf) raf.close(); } catch (IOException e) { e.printStackTrace(); } } } private static void read() { RandomAccessFile raf = null; try { raf = new RandomAccessFile(PATH, "r"); for(int i = LENGTH; i > 0; i --) { raf.seek(INT_LENGTH * (i - 1)); System.out.print(raf.readInt() + "\t"); } } catch (IOException e) { e.printStackTrace(); } finally { try { if (null != raf) raf.close(); } catch (IOException e) { e.printStackTrace(); } } } }
------解决方案--------------------
估计是作业题吧。。
试试LS的