class Parent { String one, two; public Parent(StringA, String b){ one = a; two = b; } public void print(　　){ System.out.println(　　); } } public class Child extends Parent { public Child(StringA, String b){ super(　　); } public void print(　　){ System.out.println(one + " to " + two); } public static void main(String args]){ Parent p = new Parent("south", "north"); Parent t = new Child("east", "west"); p.print(); t.print(); } }运行结果 southEast to west