03-04 object-oriented design principle _ design experiment

Design Lab

There are three switches: a B c

There are 3 electric lights: x y z

Implementation requirements:

A can control x

B can control x and y

C-energy x

Note: One bulb can be controlled by multiple switches. One bulb can be controlled by multiple bulb at the same time.

"Control": When the switch is enabled, the current light bulb status is flipped. Bright-> destroy or destroy-> bright

Import java. util. *; class Light {private boolean state; // The Light state. True: Bright public String toString () {if (state) return "bright"; elsereturn "off";} // flipped public void change () {state =! State;} class Switch {// Light [] a =... vector v = new Vector (); public void addLight (Light x) {v. add (x) ;}// click public void press () {for (int I = 0; I