diff --git a/src/j1/TestThread.java b/src/j1/TestThread.java
index 840a328..0d9c4c4 100644
--- a/src/j1/TestThread.java
+++ b/src/j1/TestThread.java
@@ -1,34 +1,36 @@
 package j1;
 
 //-----------------------------------------------------------
-public class TestThread{
-    public static void main(String[] args){
-	System.out.print("TestThread started.");
+public class TestThread {
+	public static void main(String[] args) {
+		System.out.print("TestThread started.");
 
-	MyThread mt1 = new MyThread("1 ", 1300);
-	MyThread mt2 = new MyThread("2 ", 2900);
-		
-	mt1.start();
-	mt2.start();
-    }
+		MyThread mt1 = new MyThread("1 ", 1300); //mes, wait msec
+		MyThread mt2 = new MyThread("2 ", 2900);
+
+		mt1.start();
+		mt2.start();
+	}
 };
-//-----------------------------------------------------------
-class MyThread extends Thread {
-    String str;
-    int msec;
 
-    MyThread(String txt, int ms) {
-	this.str = txt;
-	this.msec = ms;
-    }
-    public void run() {
-	while(true) {
-	    try {
-		System.out.print(this.str);
-		sleep(msec);	// tミリ秒動作休止
-	    } catch(InterruptedException e) {
-		break;
-	    }
-	} // end while
-    } // end of run
+// -----------------------------------------------------------
+class MyThread extends Thread {
+	String str;
+	int msec;
+
+	MyThread(String txt, int ms) {
+		this.str = txt;
+		this.msec = ms;
+	}
+
+	public void run() {
+		while (true) {
+			try {
+				System.out.print(this.str);
+				sleep(msec); // tミリ秒動作休止
+			} catch (InterruptedException e) {
+				break;
+			}
+		} // end while
+	} // end of run
 } // end of class myThread