wordstatistic.java

来自「用JAVA编写的有关统计的应用」· Java 代码 · 共 65 行

import java.io.*;
import java.util.Vector;
public class WordStatistic
{Vector allWords,noSameWord;
 WordStatistic()
 {
  allWords=new Vector();
  noSameWord=new Vector();
 }
public void wordStatistic(File file)
{
 try
 {
  RandomAccessFile inOne=new  RandomAccessFile(file,"rw");                   //代码1
  RandomAccessFile inTwo=new  RandomAccessFile(file,"rw");                   //代码2
  long wordStarPostion=0,wordEndPostion=0;
  long length=inOne.length();
  int flag=1;
  int c=-1;
  for(int k=0;k<=length;k++)
  {
   c=inOne.read();                             //代码3
   boolean boo=(c<='Z'&&c>='A')||(c<='z'&&c>='a');
   if(boo)
   {
	if(flag==1)
	{
	  wordStarPostion=inOne.getFilePointer()-1;
	  flag=0;
	}
}
	else
	{
	 if(flag==0)
	 {
	  if(c==-1)
	  wordEndPostion=inOne.getFilePointer();
	  else
	  wordEndPostion=inOne.getFilePointer()-1;
	  inTwo.seek(wordStarPostion);                //代码4
	  byte cc[]=new byte[(int)wordEndPostion-(int)wordStarPostion];
	  inTwo.readFully(cc);                          //代码5
	  String word=new String(cc);
	  allWords.add(word);
	  if(!(noSameWord.contains(word)))
	   noSameWord.add(word);
	 }
		flag=1;
		}
	   }
	   inOne.close();
	   inTwo.close();
	  }
	  catch(Exception e){}
	 }
	 public Vector getAllWords()
	 {return allWords;
	 }
	public Vector getNoSameWord()
	{return noSameWord;
	}
}