diff --git a/JavassistTest/src/tracer/Tracer.java b/JavassistTest/src/tracer/Tracer.java
index 71a9460..3884e00 100644
--- a/JavassistTest/src/tracer/Tracer.java
+++ b/JavassistTest/src/tracer/Tracer.java
@@ -84,34 +84,34 @@
 				if (f.isReader()) {
 					String thisOutput = "";
 					if ((m.getModifiers() & Modifier.STATIC) == 0 && m instanceof CtMethod) {
-						thisOutput = "System.out.print(\"get:\" + this.getClass().getName() + \":\" + System.identityHashCode(this) + \":\"); ";
+						thisOutput = "tracer.MyPrintStream.print(\"get:\" + this.getClass().getName() + \":\" + System.identityHashCode(this) + \":\"); ";
 					} else {
 						// static���\�b�h���R���X�g���N�^�̏ꍇ
-						thisOutput = "System.out.print(\"get:" + declaredClassName + ":0:\"); ";
+						thisOutput = "tracer.MyPrintStream.print(\"get:" + declaredClassName + ":0:\"); ";
 					}
 					f.replace("{$_ = $proceed(); " + 
 								thisOutput + 
 								"if ($0 != null) {" + 		// target
-									"System.out.print($0.getClass().getName() + \":\" + System.identityHashCode($0) + \":\"); " + 
+									"tracer.MyPrintStream.print($0.getClass().getName() + \":\" + System.identityHashCode($0) + \":\"); " + 
 								"} else {" + 
-									"System.out.print(\"---:0:\"); " + 
+									"tracer.MyPrintStream.print(\"---:0:\"); " + 
 								"} " + 
 								"if ($_ != null) {" + 		// o
-									"System.out.println($_.getClass().getName() + \":\" + System.identityHashCode($_) + " + lineAndThread + ");" + 
+									"tracer.MyPrintStream.println($_.getClass().getName() + \":\" + System.identityHashCode($_) + " + lineAndThread + ");" + 
 								"} else {" + 
-									"System.out.println(\"---:0\" + " + lineAndThread + ");" + 
+									"tracer.MyPrintStream.println(\"---:0\" + " + lineAndThread + ");" + 
 								"} " + "}");
 				} else {
 					f.replace("{$proceed($$); " + 
 								"if ($0 != null) {" + 		// target
-									"System.out.print(\"set:\" + $0.getClass().getName() + \":\" + System.identityHashCode($0) + \":\"); " + 
+									"tracer.MyPrintStream.print(\"set:\" + $0.getClass().getName() + \":\" + System.identityHashCode($0) + \":\"); " + 
 								"} else {" + 
-									"System.out.print(\"set:" + declaredClassName + ":0:\"); " + 
+									"tracer.MyPrintStream.print(\"set:" + declaredClassName + ":0:\"); " + 
 								"} " + 
 								"if ($1 != null) {" + 		// o[0]
-									"System.out.println($1.getClass().getName() + \":\" + System.identityHashCode($1) + " + lineAndThread + ");" + 
+									"tracer.MyPrintStream.println($1.getClass().getName() + \":\" + System.identityHashCode($1) + " + lineAndThread + ");" + 
 								"} else {" + 
-									"System.out.println(\"---:0\" + " + lineAndThread + ");" + 
+									"tracer.MyPrintStream.println(\"---:0\" + " + lineAndThread + ");" + 
 								"}" + "}");
 				}
 			}
@@ -123,7 +123,7 @@
 		String argsOutput = "";
 		String returnOutput = "";
 		
-		String delimiter = "System.out.println(\"Args:\" + ";
+		String delimiter = "tracer.MyPrintStream.println(\"Args:\" + ";
 		CtClass parameterClasses[] = m.getParameterTypes();
 		int p = 0;
 		for (CtClass c : parameterClasses) {
@@ -151,22 +151,22 @@
 		if ((m.getModifiers() & Modifier.STATIC) != 0) {
 			// static���\�b�h�̏ꍇ
 			longName = accessor + "static " + m.getLongName();
-			methodOutput = "System.out.println(\"Method " + declaredClassName + "," + longName
+			methodOutput = "tracer.MyPrintStream.println(\"Method " + declaredClassName + "," + longName
 					+ ":\" + 0 + " + line + " + System.nanoTime() + \":ThreadNo \" + Thread.currentThread().getId());";
-			classOutput = "System.out.println(\"Class " + declaredClassName + ":\" + 0 + " + lineAndThread + ");";
+			classOutput = "tracer.MyPrintStream.println(\"Class " + declaredClassName + ":\" + 0 + " + lineAndThread + ");";
 		} else if (m instanceof CtConstructor) {
 			// �R���X�g���N�^�̏ꍇ
 			longName = accessor + m.getLongName();
-			newOutput = "System.out.println(\"New " + declaredClassName + ":\" + 0 + " + lineAndThread + ");";
-			methodOutput = "System.out.println(\"Method " + declaredClassName + "," + longName
+			newOutput = "tracer.MyPrintStream.println(\"New " + declaredClassName + ":\" + 0 + " + lineAndThread + ");";
+			methodOutput = "tracer.MyPrintStream.println(\"Method " + declaredClassName + "," + longName
 					+ ":\" + 0 + " + line + " + System.nanoTime() + \":ThreadNo \" + Thread.currentThread().getId());";
-			classOutput = "System.out.println(\"Class " + declaredClassName + ":\" + 0 + " + lineAndThread + ");";
+			classOutput = "tracer.MyPrintStream.println(\"Class " + declaredClassName + ":\" + 0 + " + lineAndThread + ");";
 		} else {
 			// �ʏ�̃��\�b�h�̏ꍇ
 			longName = accessor + ((CtMethod)m).getReturnType().getName() + " " + m.getLongName();
-			methodOutput = "System.out.println(\"Method \" + this.getClass().getName() + \"," + longName
+			methodOutput = "tracer.MyPrintStream.println(\"Method \" + this.getClass().getName() + \"," + longName
 					+ ":\" + System.identityHashCode(this) + " + line + " + System.nanoTime() + \":ThreadNo \" + Thread.currentThread().getId());";
-			classOutput = "System.out.println(\"Class \" + this.getClass().getName() + \":\" + System.identityHashCode(this) + " + lineAndThread + ");";
+			classOutput = "tracer.MyPrintStream.println(\"Class \" + this.getClass().getName() + \":\" + System.identityHashCode(this) + " + lineAndThread + ");";
 		}
 		
 		String shortName = null;
@@ -174,25 +174,25 @@
 			// static���\�b�h�̏ꍇ
 			shortName = cc.getSimpleName() + "." + m.getName() + "()";
 			returnOutput =  "if ($_ != null) {" + 
-								"System.out.print(\"Return execution(" + shortName + "):\" + $_.getClass().getName() + \":\" + System.identityHashCode($_) + \":\");" + 
+								"tracer.MyPrintStream.print(\"Return execution(" + shortName + "):\" + $_.getClass().getName() + \":\" + System.identityHashCode($_) + \":\");" + 
 							"} else {" + 
-								"System.out.print(\"Return execution(" + shortName + "):void:0:\");" + 
+								"tracer.MyPrintStream.print(\"Return execution(" + shortName + "):void:0:\");" + 
 							"} " + 
-							"System.out.println(\"0\" + " + lineAndThread + ");";
+							"tracer.MyPrintStream.println(\"0\" + " + lineAndThread + ");";
 		} else if (m instanceof CtConstructor) {
 			// �R���X�g���N�^�̏ꍇ
 			shortName = m.getName() + "()";
-			returnOutput =  "System.out.print(\"Return initialization(" + shortName + "):" + declaredClassName + ":\" + System.identityHashCode($0) + \":\");" + 
-							"System.out.println(\"\" + System.identityHashCode($0) + " + lineAndThread + ");";
+			returnOutput =  "tracer.MyPrintStream.print(\"Return initialization(" + shortName + "):" + declaredClassName + ":\" + System.identityHashCode($0) + \":\");" + 
+							"tracer.MyPrintStream.println(\"\" + System.identityHashCode($0) + " + lineAndThread + ");";
 		} else {
 			// �ʏ�̃��\�b�h�̏ꍇ
 			shortName = cc.getSimpleName() + "." + m.getName() + "()";
 			returnOutput =  "if ($_ != null) {" + 
-								"System.out.print(\"Return execution(" + shortName + "):\" + $_.getClass().getName() + \":\" + System.identityHashCode($_) + \":\");" + 
+								"tracer.MyPrintStream.print(\"Return execution(" + shortName + "):\" + $_.getClass().getName() + \":\" + System.identityHashCode($_) + \":\");" + 
 							"} else {" + 
-								"System.out.print(\"Return execution(" + shortName + "):void:0:\");" + 
+								"tracer.MyPrintStream.print(\"Return execution(" + shortName + "):void:0:\");" + 
 							"} " + 
-							"System.out.println(\"\" + System.identityHashCode(this) + " + lineAndThread + ");";
+							"tracer.MyPrintStream.println(\"\" + System.identityHashCode(this) + " + lineAndThread + ");";
 		}
 		
 		
@@ -276,31 +276,31 @@
 		// m.getMethodInfo().getLineNumber(blocks[3].position());
 		// int block4 =
 		// m.getMethodInfo().getLineNumber(blocks[4].position());
-		//�@m.insertAt(block0, "System.out.println(\"block0:\" + " + block0 + ");");
-		// m.insertAt(block1, "System.out.println(\"block1:\" + " +
+		//�@m.insertAt(block0, "tracer.MyPrintStream.println(\"block0:\" + " + block0 + ");");
+		// m.insertAt(block1, "tracer.MyPrintStream.println(\"block1:\" + " +
 		// block1 + ");");
-		// m.insertAt(block2, "System.out.println(\"block2:\" + " +
+		// m.insertAt(block2, "tracer.MyPrintStream.println(\"block2:\" + " +
 		// block2 + ");");
-		// m.insertAt(block3, "System.out.println(\"block3:\" + " +
+		// m.insertAt(block3, "tracer.MyPrintStream.println(\"block3:\" + " +
 		// block3 + ");");
-		// m.insertAt(block4, "System.out.println(\"block4:\" + " +
+		// m.insertAt(block4, "tracer.MyPrintStream.println(\"block4:\" + " +
 		// block4 + ");");
 
 		// int block0 =
 		// m.getMethodInfo().getLineNumber(blocks[0].position());
-		// m.insertAt(block0, "System.out.println(\"block0\");");
+		// m.insertAt(block0, "tracer.MyPrintStream.println(\"block0\");");
 		// m = cc.getDeclaredMethod("getC");
 		// cf = new ControlFlow(m);
 		// blocks = cf.basicBlocks();
 		// int block1 =
 		// m.getMethodInfo().getLineNumber(blocks[1].position());
-		// m.insertAt(block1, "System.out.println(\"block1\");");
+		// m.insertAt(block1, "tracer.MyPrintStream.println(\"block1\");");
 		// m = cc.getDeclaredMethod("getC");
 		// cf = new ControlFlow(m);
 		// blocks = cf.basicBlocks();
 		// int block2 =
 		// m.getMethodInfo().getLineNumber(blocks[2].position());
-		// m.insertAt(block2, "System.out.println(\"block2\");");
+		// m.insertAt(block2, "tracer.MyPrintStream.println(\"block2\");");
 
 		// m.instrument(new ExprEditor() {
 		// public void edit(MethodCall m) throws CannotCompileException