简单的关于类的继承（一）

package collection;

class Father {
    public Father(String arg) {
        System.out.println(arg);
    }
}

class Son extends Father {
    public Son(String arg) {
        super(arg);
        System.out.println(arg);
    }
}

public class MyExtends {
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Son son = new Son("aa");
    }
}

package collection;

class Father {
    public Father(String arg) {
        System.out.println(arg);
    }
}

class Son extends Father {
    public Son(String arg) {
        super(arg);
        System.out.println(arg);
    }
}

public class MyExtends {
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Son son = new Son("aa");
    }
}