kwic学习,摘自网络

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import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.StringTokenizer;
public class mykwic {
    private static BufferedReader input_file;
    private ArrayList<String> kwicList;
    public mykwic (String filename)   //construct the index of file fname
    {
        kwicList = new ArrayList<String>();
        String line="";
        fileopen(filename);
        while (line!= null)
        {
            line= readline();
            if (line !=null)
            {
                parseLine(line, kwicList);
            }
          }
         //Collections.sort(kwicList);
         display ( kwicList );
    }
    public static void fileopen(String InputFilename) {
        try {
            input_file = new BufferedReader(new FileReader(InputFilename));
        } catch (IOException e) {
            System.err.println(("File not open" + e.toString()));
            System.exit(1);
        }
    }
    public static String readline() {
        String line ="";
        try {
            line = input_file.readLine();
        } catch (Exception e) {
            e.getStackTrace();
        }
        return line;
    }
    public void parseLine(String line,ArrayList<String> list) {
        StringTokenizer tokener = new StringTokenizer(line);
        String token = new String();
        int index;
        ArrayList<String> tokens = new ArrayList<String>();
        int count = tokener.countTokens();
        for (int j = 0; j < count; j++) {//将一行解析，并且将解析的word加入ArrayList中
            token = tokener.nextToken();
            tokens.add(token);
        }
        //对ArrayList中的字进行循环移位，得出最后结果
        for (int i = 0; i < count; i++) {
            index=i;
            StringBuffer linebuffer = new StringBuffer();
            for (int j = 0; j < count; j++) {
                if (index >= count)
                      index = 0;
                    linebuffer.append ( tokens.get(index) );
                    linebuffer.append (" ");
                    index++;
            }
            line = linebuffer.toString();
            kwicList.add(line);
        }
    }
    public static void display(ArrayList<String> List) {
        System.out.println("Output is");
        for (int count = 0; count < List.size(); count++) {
              System.out.println (List.get (count) );
        }
    }
    public static void main(String[] args) {
            new mykwic("test.txt");
    }
}

作者：gnuhpc
出处：http://www.cnblogs.com/gnuhpc/

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