現(xiàn)在寫一個用狀態(tài)模式實現(xiàn)的根據(jù)上班時間狀態(tài)變化而行為變化的小程序，當時間<12上午上班時間，
<13午休時間，<17下午上班時間，<21加班時間，根據(jù)時間不同，條用的類方法不同。
狀態(tài)模式適用于當對象的狀態(tài)改變時，行為也改變，就可以使用狀態(tài)模式
狀態(tài)接口：
public interface State {
void writeProgram(Work work);
}
不同的實現(xiàn)類：
public class AfterNoonState implements State {
@Override
public void writeProgram(Work work) {
if(work.getHour()<17){
System.out.println("工作");
}else {
work.setCurrent(new EveningState());
work.writeProgram();
}
}
}
public class EveningState implements State {
@Override
public void writeProgram(Work work) {
if(work.isFinish()){
work.setCurrent(new RestState());
work.writeProgram();
}else {
if(work.getHour()<21){
System.out.println("加班");
}else {
work.setCurrent(new SleepState());
work.writeProgram();
}
}
}
}
public class ForenoonState implements State {
@Override
public void writeProgram(Work work) {
if(work.getHour()<12){
System.out.println("工作時間");
}else {
work.setCurrent(new NoonState());
work.writeProgram();
}
}
}
public class NoonState implements State {
@Override
public void writeProgram(Work work) {
if(work.getHour()<13){
System.out.println("午睡");
}else {
work.setCurrent(new AfterNoonState());
work.writeProgram();
}
}
}
public class RestState implements State {
@Override
public void writeProgram(Work work) {
System.out.println("回家");
}
}
public class SleepState implements State {
@Override
public void writeProgram(Work work) {
System.out.println("睡覺");
}
}
調用狀態(tài)的類：
public class Work {
private State current;
public Work(double hour,boolean finish){
current = new ForenoonState();
this.hour = hour;
this.finish = finish;
}
private double hour;
public double getHour() {
return hour;
}
public State getCurrent() {
return current;
}
public void setCurrent(State current) {
this.current = current;
}
private boolean finish;
public boolean isFinish() {
return finish;
}
public void writeProgram(){
current.writeProgram(this);
}
}
測試類：
public class Test {
public static void main(String[] args) {
Work work = new Work(20, true);
work.writeProgram();
}
}