class Curiosity {
    public static void main (String[ ]  args)
    { 
        System.out.println ("A curiosity"); 
        http: //kaddy.co   
        System.out.println ("compile Ok!");
    }
}

/* http : --> is a lable*/
class Curiosity {
    public static void main (String[ ]  args)
    { 
        System.out.println ("A curiosity"); 
        http: //kaddy.co   
        System.out.println ("compile Ok!");
    }
}

Update ThisWillCompile.java