/**
* 命令模式
* @author TMAC-J
* 将调用者和接受者分离
* 可以将一组命令组合在一起，适合很多命令的时候
*/
public class CommandPattern { interface Command{
void excute();
} public class TVReceiver{ public void shift(){
System.out.println("shift");
} public void turnon(){
System.out.println("turnon");
} public void Turndown(){
System.out.println("Turndown");
} } public class ShiftTV implements Command{ private TVReceiver tv; public ShiftTV(TVReceiver tv) {
this.tv = tv;
} @Override
public void excute() {
tv.shift();
} } public class TurnonTV implements Command{ private TVReceiver tv; public TurnonTV(TVReceiver tv) {
this.tv = tv;
} @Override
public void excute() {
tv.turnon();
} }
public class Turndown implements Command{ private TVReceiver tv; public Turndown(TVReceiver tv) {
this.tv = tv;
} @Override
public void excute() {
tv.Turndown();
} } public class Invoker{ private Command shiftTv,turnon,turndown; public Invoker(Command shiftTv,Command turnonTV,Command turndown) {
this.shiftTv = shiftTv;
this.turnon = turndown;
this.turndown = turndown;
} public void shift(){
shiftTv.excute();
} public void turnon(){
turnon.excute();
} public void turndown(){
turndown.excute();
}
} public class Client{
public void test(){
TVReceiver tv = new TVReceiver();
Invoker invoker = new Invoker(new ShiftTV(tv), new TurnonTV(tv), new Turndown(tv));
invoker.shift();
invoker.turnon();
invoker.turndown();
}
} }