--- a/src/howtouse/CharReader.java	Wed Aug 22 01:44:26 2012 +0900
+++ b/src/howtouse/CharReader.java	Wed Aug 22 01:58:54 2012 +0900
@@ -1,15 +1,12 @@
 package howtouse;
 
-import java.io.BufferedReader;
-import java.io.IOException;
 
 public class CharReader {
 
 	final static char EOFchar = (char) 0;
 
-	private BufferedReader reader;
-	private String line;
-	private int lineLength;
+	private String text;
+	private int textLength;
 	private int index;
 
 	private final char LBRANK = '[';
@@ -26,42 +23,25 @@
 
 	}
 
-	CharReader(BufferedReader r) {
-		reader = r;
-		lineLength = 0;
-		index = 1;
-	}
-
 	CharReader() {
-		lineLength = 0;
-		index = 1;
 	}
 	
-
+	public void setText(String str) {
+		text = str;
+		textLength = text.length();
+		index = 0;
+	}
 
 	
 	char nextChar() {
-		if (index < lineLength)
-			return line.charAt(index++);
-
-		if (index++ == lineLength)
-			return '\n';
+		if (index < textLength)
+			return text.charAt(index++);
 
-		try {
-			if ((line = reader.readLine()) != null) {
-				lineLength = line.length();
-				index = 0;
-				return nextChar();
-			}
-		} catch (IOException e) {
-			System.out.println("Cannot read line");
-
-		}
 		return EOFchar;
 
 	}
 
-	String getToken() throws IOException {
+	String getToken() {
 
 		int nextState = 1;
 
@@ -100,7 +80,7 @@
 						return buf.substring(0,index);
 					}
 				} else {
-					throw new IOException("Faild read string");
+					return null;
 				}
 			}
 

--- a/src/howtouse/WikiLinkParser.java	Wed Aug 22 01:44:26 2012 +0900
+++ b/src/howtouse/WikiLinkParser.java	Wed Aug 22 01:58:54 2012 +0900
@@ -1,44 +1,34 @@
 package howtouse;
 
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.io.FileInputStream;
-import java.io.File;
-import java.io.StringReader;
+import java.util.HashSet;
 
 public class WikiLinkParser {
 
-	
 	public static void main(String[] args) {
-		
-/*
-		BufferedReader breader = new BufferedReader(new InputStreamReader
-				(new FileInputStream(new File("./resource/article.xml"))));
-*/
-		
+
 		String text = "asdfadf [[link1]]sadf;lkjadsf[[link2]]\n;lkjsadfkj[[link3|link_err]]";
-		StringReader sreader = new StringReader(text);
-		BufferedReader breader = new BufferedReader(sreader);
-		
-		CharReader reader = new CharReader(breader);
-		String str;
-
-		try {
-			while ( (str = reader.getToken()) != null) {
-				System.out.println(str);
-			}
-		} catch (IOException e) {
-			e.printStackTrace();
+		WikiLinkParser parser = new WikiLinkParser();
+		HashSet<String> hash;
+		hash = parser.parse(text);
+		for (String link : hash) {
+			System.out.println(link);
 		}
-
-	
 	}
 
-	
-	
-	
+	private CharReader reader;
+
+	WikiLinkParser() {
+		reader = new CharReader();
+	}
 	
-	
-	
+	public HashSet<String> parse(String text) {
+		HashSet<String> hash = new HashSet<String>();
+		
+		reader.setText(text);
+		String str;
+		while ( (str = reader.getToken()) != null) hash.add(str); 
+			
+		return hash;
+		
+	}
 }