exercise16_14.java

java程序设计导论（daniel liang著） 所有偶数课后习题答案

import java.io.*;

public class Exercise16_14 {
  public static void main(String[] args) throws IOException {
    RandomAccessFile raf = new RandomAccessFile("Exercise16_14.dat", "rw");
    
    int count = 0;
    
    if (raf.length() > 0)
      count = raf.readInt();
    
    raf.seek(0);
    raf.writeInt(++count);
    System.out.println("Current count is " + count);
    raf.close();
  } 
}