JAva学習のimplemetnsルーチン

// Hello 
interface Hello {

    public void sayhello();
}
// World 
interface World{
    public void sayworld();
}

// Student, Hello,World 
class Student implements Hello,World{
    // 
    public void sayhello()
    {
        System.out.print("hello");
    }
    public void sayworld()
    {
        System.out.println(" world!"+"
");
    }
}

public class Test{
    public static void main(String args[])
    {
        Student p = new Student();
        p.sayhello();
        p.sayworld();
    }
}