package myproject1;

public class HelloWorld {
	// test method
	public static void main(String[] args) {
		System.out.print("Hello World!");
		System.out.print("日本語を追加！");
	}
}

package myproject1;

public class HelloWorld {
	public static void main(String[] args) {
		System.out.print("Hello World!");
		System.out.print("日本語を追加！");
	}
}

remove comment.