/**
*
*/
package com.jason.kwic.mainSubroutine;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Scanner;
/**
* 基于主程序/子程序风格的kiwc实现
* @author jasonzhang
*
*/
public class MainSubroutine {
private ArrayList<ArrayList<String>> linelist = new ArrayList<ArrayList<String>>();
private ArrayList<String> shiftedLineList = new ArrayList<String>();
public static void main(String[] args) throws IOException {
MainSubroutine main = new MainSubroutine();
main.input();
main.shift();
main.alphabetizer();
main.output();
}
private void input() throws IOException {
File infile = new File("d:\\temp\\mykwic_in.txt");
Scanner sc = new Scanner(infile);
String tempLine = null;
System.out.println("input is");
while (sc.hasNextLine()) {
tempLine = sc.nextLine();
System.out.println(tempLine);
this.linelist.add(this.lineSplitWord(tempLine));
}
}
private void shift() {
for (ArrayList<String> wordLine : this.linelist) {
this.shiftWordLine(wordLine);
}
}
private void alphabetizer() {
//按字母表排序
Collections.sort(this.shiftedLineList, new AlphaabetizerComparator());
}
private void output() {
System.out.println("output is");
for (String line : this.shiftedLineList) {
System.out.println(line);
}
}
private ArrayList<String> lineSplitWord(String line) {
ArrayList<String> wordList = new ArrayList<String>();
String word = "";
int i = 0;
while(i < line.length()){
if(line.charAt(i) != ‘ ‘){
word += line.charAt(i);
}
else{
wordList.add(word);
word = "";
}
i++;
}
if (word.length() > 0) {
wordList.add(word);
}
return wordList;
}
private void shiftWordLine(ArrayList<String> wordLine) {
StringBuilder tempLine = new StringBuilder();
int wordNums = wordLine.size();
//System.out.println("shifed is");
for (int i=0; i<wordNums; i++) {
for (int j=(wordNums - 1 -i); j < wordNums; j++) {
tempLine.append(wordLine.get(j)).append(‘ ‘);
}
for (int k=0; k<(wordNums - 1 -i); k++) {
if (k != (wordNums - i - 2)) {
tempLine.append(wordLine.get(k)).append(‘ ‘);
} else {
tempLine.append(wordLine.get(k));
}
}
//System.out.println(tempLine.toString());
this.shiftedLineList.add(tempLine.toString());
tempLine.delete(0, tempLine.length());
}
}
private class AlphaabetizerComparator implements Comparator<String> {
@Override
public int compare(String o1, String o2) {
if (o1 == null || o2 == null) {
throw new NullPointerException();
}
int compareValue = 0;
char o1FirstCharacter = o1.charAt(0);
char o2FirstCharacter = o2.charAt(0);
if(this.isLetter(o1FirstCharacter) && this.isLetter(o2FirstCharacter)) {
//如果是小写的字母的值,则转成对应的大写的字母的值
o1FirstCharacter = this.toUpperCase(o1FirstCharacter);
o2FirstCharacter = this.toUpperCase(o2FirstCharacter);
compareValue = o1FirstCharacter - o2FirstCharacter;
} else {
throw new RuntimeException("必须是字母");
}
return compareValue;
}
private boolean isLetter(char c) {
return (c >= 65 && c <= 90) || (c >= 97 && c <= 122);
}
private char toUpperCase(char c) {
if (Character.isLowerCase(c)) {
return Character.toUpperCase(c);
}
return c;
}
}
}
这种风格基本上就是一个类实现所有的事情。
原文:http://my.oschina.net/u/914897/blog/409151