diff --git a/TracerOnJavassist/src/tracer/JSONTraceGenerator.java b/TracerOnJavassist/src/tracer/JSONTraceGenerator.java
index f9f0f65..83ec795 100644
--- a/TracerOnJavassist/src/tracer/JSONTraceGenerator.java
+++ b/TracerOnJavassist/src/tracer/JSONTraceGenerator.java
@@ -32,7 +32,7 @@
 		keys.add("lineNum");	values.add(lineNum);
 		keys.add("time");		values.add(timeStamp);
 		return "$proceed($$); " + 
-				"tracer.MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+				Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -52,7 +52,7 @@
 		keys.add("lineNum");	values.add(lineNum);
 		keys.add("time");		values.add(timeStamp);
 		return "$_ = $proceed(); " + 
-				"tracer.MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+				Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 	
 
@@ -69,7 +69,7 @@
 		keys.add("lineNum");	values.add(lineNum);
 		keys.add("time");		values.add(timeStamp);
 		return "$_ = $proceed($$); " + 
-				"tracer.MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+				Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -98,7 +98,7 @@
 		keys.add("args");			values.add(generateJSONArrayGenerator(argList));
 		keys.add("threadId");		values.add(threadId);
 		keys.add("time");			values.add(timeStamp);
-		return "tracer.MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+		return Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -120,7 +120,7 @@
 		keys.add("returnValue");	values.add(generateJSONObjectGenerator(returnedClass, returnedObject));
 		keys.add("threadId");		values.add(threadId);
 		keys.add("time");			values.add(timeStamp);
-		return "tracer.MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+		return Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -131,7 +131,7 @@
 		keys.add("callerSideSignature");	values.add(DQ_GEN + " + \"" + m.getLongName().replace('$', '.') + "\" + " + DQ_GEN);		// AspectJ�ł̓��\�b�h�V�O�j�`�����ł͖����N���X�̓h�b�g�ŋ�؂���
 		keys.add("threadId");				values.add(threadId);
 		keys.add("lineNum");				values.add(lineNum);
-		return "tracer.MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+		return Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -149,7 +149,7 @@
 		keys.add("threadId");			values.add(threadId);
 		keys.add("lineNum");			values.add(lineNum);
 		keys.add("time");				values.add(timeStamp);
-		return "tracer.MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+		return Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 	
 	private String generateJSONObjectGenerator(String className, String objectId) {