diff --git a/TracerOnJavassist/src/tracer/JSONArrayAdvisor.java b/TracerOnJavassist/src/tracer/JSONArrayAdvisor.java
index 8bcbe47..5095460 100644
--- a/TracerOnJavassist/src/tracer/JSONArrayAdvisor.java
+++ b/TracerOnJavassist/src/tracer/JSONArrayAdvisor.java
@@ -86,7 +86,7 @@
 	public static void arrayWriteChar(Object array, int index, char value) {
 		long threadId = Thread.currentThread().getId();
 		long timeStamp = System.nanoTime();
-		JSONTraceGenerator.arraySetOutput(array.getClass().getName(), Integer.toString(System.identityHashCode(array)), index, "char", Character.toString(value), threadId, timeStamp);
+		JSONTraceGenerator.arraySetOutput(array.getClass().getName(), Integer.toString(System.identityHashCode(array)), index, "char", Integer.toString(Character.getNumericValue(value)), threadId, timeStamp);
 		((char [])array)[index] = value;
 	}
 
@@ -94,7 +94,7 @@
 		char value = ((char [])array)[index];
 		long threadId = Thread.currentThread().getId();
 		long timeStamp = System.nanoTime();
-		JSONTraceGenerator.arrayGetOutput(array.getClass().getName(), Integer.toString(System.identityHashCode(array)), index, "char", Character.toString(value), threadId, timeStamp);
+		JSONTraceGenerator.arrayGetOutput(array.getClass().getName(), Integer.toString(System.identityHashCode(array)), index, "char", Integer.toString(Character.getNumericValue(value)), threadId, timeStamp);
 		return value;
 	}
 	
diff --git a/TracerOnJavassist/src/tracer/MyPrintStream.java b/TracerOnJavassist/src/tracer/MyPrintStream.java
index bb76bfb..0c93477 100644
--- a/TracerOnJavassist/src/tracer/MyPrintStream.java
+++ b/TracerOnJavassist/src/tracer/MyPrintStream.java
@@ -1,6 +1,8 @@
 package tracer;
 
+import java.io.PrintStream;
 import java.util.ArrayList;
+import java.util.LinkedList;
 
 /**
  * �g���[�X�o�͗p���[�e�B���e�B
@@ -10,15 +12,17 @@
  */
 public class MyPrintStream extends Thread {
 	private static MyPrintStream theInstance;
-	private static ArrayList<String> output;
-	private static String s;
+	private static LinkedList<String> output;
+	private static String s = null;
+	private static PrintStream sysout = null;
 //	private static boolean bFlushed = false;
 //	private static int count = 0;
 	
 	private static MyPrintStream getInstance() {
 		if (theInstance == null) {
 			theInstance = new MyPrintStream();
-			output = new ArrayList<String>();
+			output = new LinkedList<String>();
+			sysout = System.out;
 			Runtime.getRuntime().addShutdownHook(theInstance);		// �V���b�g�_�E���p
 //			theInstance.start();
 		}
@@ -63,36 +67,43 @@
 //		} else {
 			// �V���b�g�_�E�����Ƀo�b�t�@�Ɏc�����g���[�X���o�͂��؂�
 //			bFlushed = true;
-			for (int n = 0; n < output.size(); n++) {
-				System.out.println(output.get(n));	
+			for (String s: output) {
+				sysout.println(s);	
 			}			
 //		}
 	}
 	
-	private void _print(int n) {
-		if (s == null) s = new String();
-		s += n;
+	private synchronized void _print(int n) {
+		if (s == null) {
+			s = Integer.toString(n);
+		} else {
+			s += n;
+		}
 	}
 
-	private void _print(String s1) {
-		if (s == null) s = new String();
-		s += s1;
+	private synchronized void _print(String s1) {
+		if (s == null) {
+			s = s1;
+		} else {
+			s += s1;
+		}
 	}		
 	
-	private void _println() {
-		if (s == null) s = new String();
-		synchronized (output) {
-			output.add(s);
+	private synchronized void _println() {
+		if (s == null) {
+			s = "";
 		}
-		s = new String();
+		output.add(s);
+		s = null;
 	}
 
-	private void _println(String s1) {
-		if (s == null) s = new String();
-		s += s1;
-		synchronized (output) {
-			output.add(s);
+	private synchronized void _println(String s1) {
+		if (s == null) {
+			s = s1;
+		} else {
+			s += s1;
 		}
-		s = new String();
+		output.add(s);
+		s = null;
 	}
 }
diff --git a/TracerOnJavassist/src/tracer/OutputStatementsGenerator.java b/TracerOnJavassist/src/tracer/OutputStatementsGenerator.java
index 4f28a5c..975e6e6 100644
--- a/TracerOnJavassist/src/tracer/OutputStatementsGenerator.java
+++ b/TracerOnJavassist/src/tracer/OutputStatementsGenerator.java
@@ -42,7 +42,11 @@
 			valueObject = "(($1 != null)?System.identityHashCode($1):0)";
 		} else {
 			valueClass = "\"" + f.getField().getType().getName() + "\"";		// ��{�^�̏ꍇ�AgetClass()�ł��Ȃ�����
-			valueObject = "$1";
+			if (f.getField().getType() != CtClass.charType) {
+				valueObject = "$1";
+			} else {
+				valueObject = "Character.getNumericValue($1)";					// �����^�̏ꍇ�������o�͂���Ă��܂�����				
+			}
 		}
 		String threadId = "Thread.currentThread().getId()";
 		String lineNum = "\"" + line + "\"";
@@ -71,7 +75,11 @@
 			valueObject = "(($_ != null)?System.identityHashCode($_):0)";
 		} else {
 			valueClass = "\"" + f.getField().getType().getName() + "\"";		// ��{�^�̏ꍇ�AgetClass()�ł��Ȃ�����
-			valueObject = "$_";
+			if (f.getField().getType() != CtClass.charType) {
+				valueObject = "$_";
+			} else {
+				valueObject = "Character.getNumericValue($_)";					// �����^�̏ꍇ�������o�͂���Ă��܂�����				
+			}
 		}
 		String threadId = "Thread.currentThread().getId()";
 		String lineNum = "\"" + line + "\"";
@@ -172,8 +180,12 @@
 				argClasses.add("(($" + (p + 1) + " != null)?($" + (p + 1) + ").getClass().getName():\"" + c.getName() + "\")");
 				argObjects.add("(($" + (p + 1) + " != null)?System.identityHashCode($" + (p + 1) + "):0)");
 			} else {
-				argClasses.add("\"" + c.getName() + "\"");		// ��{�^�̏ꍇ�AgetClass()�ł��Ȃ�����
-				argObjects.add("$" + (p + 1));
+				argClasses.add("\"" + c.getName() + "\"");								// ��{�^�̏ꍇ�AgetClass()�ł��Ȃ�����
+				if (c != CtClass.charType) {
+					argObjects.add("$" + (p + 1));
+				} else {
+					argObjects.add("Character.getNumericValue($" + (p + 1) + ")");		// �����^�̏ꍇ�������o�͂���Ă��܂�����				
+				}
 			}
 			p++;
 		}
@@ -197,8 +209,12 @@
 				thisClass = "\"" + declaredClassName + "\"";
 				thisObject = "\"0\"";
 			} else {
-				returnedClass = "\"" + ((CtMethod)m).getReturnType().getName() +"\"";
-				returnedObject = "$_";
+				returnedClass = "\"" + ((CtMethod)m).getReturnType().getName() +"\"";	// void �Ɗ�{�^�̏ꍇ�AgetClass()�ł��Ȃ�����
+				if (((CtMethod)m).getReturnType() != CtClass.charType) {
+					returnedObject = "$_";
+				} else {
+					returnedObject = "Character.getNumericValue($_)";					// �����^�̏ꍇ�������o�͂���Ă��܂�����				
+				}
 				thisClass = "\"" + declaredClassName + "\"";
 				thisObject = "\"0\"";
 			}
@@ -236,8 +252,12 @@
 					thisClass = "this.getClass().getName()"; 
 					thisObject = "System.identityHashCode(this)";
 				} else {
-					returnedClass = "\"" + ((CtMethod)m).getReturnType().getName() +"\"";		// ��{�^�̏ꍇ�AgetClass()�ł��Ȃ�����
-					returnedObject = "$_";
+					returnedClass = "\"" + ((CtMethod)m).getReturnType().getName() +"\"";		// void �Ɗ�{�^�̏ꍇ�AgetClass()�ł��Ȃ�����
+					if (((CtMethod)m).getReturnType() != CtClass.charType) {
+						returnedObject = "$_";
+					} else {
+						returnedObject = "Character.getNumericValue($_)";						// �����^�̏ꍇ�������o�͂���Ă��܂�����				
+					}
 					thisClass = "this.getClass().getName()"; 
 					thisObject = "System.identityHashCode(this)";
 				}
@@ -249,8 +269,12 @@
 					thisClass = "$0.getClass().getName()"; 
 					thisObject = "System.identityHashCode($0)";
 				} else {
-					returnedClass = "\"" + ((CtMethod)m).getReturnType().getName() +"\"";		// ��{�^�̏ꍇ�AgetClass()�ł��Ȃ�����
-					returnedObject = "$_";
+					returnedClass = "\"" + ((CtMethod)m).getReturnType().getName() +"\"";		// void �Ɗ�{�^�̏ꍇ�AgetClass()�ł��Ȃ�����
+					if (((CtMethod)m).getReturnType() != CtClass.charType) {
+						returnedObject = "$_";
+					} else {
+						returnedObject = "Character.getNumericValue($_)";						// �����^�̏ꍇ�������o�͂���Ă��܂�����				
+					}
 					thisClass = "$0.getClass().getName()"; 
 					thisObject = "System.identityHashCode($0)";
 				}