タスク-1日の指定された時間に電球のオンとオフを切り替えます。以下の情報に従って、コードを修正する方法を知る必要があります。また、タイマークラスを正しく使用しているかどうか、つまり、コードの設計が正しいかどうかを知る必要があります。コードは機能するかもしれませんが、後で問題を引き起こす可能性のある悪いデザインである可能性があります。私はそれが起こらないようにしたい。
出力は（これは私が本当に望んでいた出力ではありません:(）-
This is the main program
Current time is - xxx
Future time is - xxx+5sec
Future time is - xxx+10sec
Main program ends
Bulb B1 is OFF
必要な出力-
This is the main program
Current time is - xxx
Future time is - xxx+5sec
Future time is - xxx+10sec
Bulb B1 is ON //first on
Bulb B1 is OFF //then off
Main program ends//This should always be in the end.
以下のコードを修正して、必要なものを取得するにはどうすればよいですか？
Bulbクラス
class Bulb {
private boolean state = false;//On or off
private String name;
Bulb(String name){
this.name = name;
}
public void setState(boolean state){
this.state = state;
if(this.state == true){
System.out.println("Bulb " + name + " is ON");
}else{
System.out.println("Bulb " + name + " is OFF");
}
}
public boolean getState(){
return this.state;
}
}
BulbJobであるクラスTimerTask
import java.util.*;
class BulbJob extends TimerTask{
private Bulb bulbToHandle;
private boolean setBulbStateEqualTo;
BulbJob(Bulb toHandle){
this.bulbToHandle = toHandle;
}
//NOTE: Must be called before run(), otherwise default value is used
public void setBulbStateEqualTo(boolean setBulbStateEqualTo){
this.setBulbStateEqualTo = setBulbStateEqualTo;
}
//NOTE: call run() only before calling above method
public void run(){
this.bulbToHandle.setState(setBulbStateEqualTo);//Set on or off
}
}
BulbSchedulerクラス-これは、電球がオンまたはオフになるタイミングをスケジュールします。
import java.util.*;
@SuppressWarnings( "deprecation" )
class BulbScheduler {
public static void main(String args[]) throws InterruptedException{
System.out.println("This is the main program");
Timer time = new Timer();
Bulb b1 = new Bulb("B1");
BulbJob bj = new BulbJob(b1);
bj.setBulbStateEqualTo(true);//Task - Turn bulb on at time = afterCurrent
Date current = new Date();//Get current time and execute job ten seconds after this time
Date afterCurrent = (Date) current.clone();
System.out.println("Current time is - " + current);
int currentSecs = current.getSeconds();
int offset = 5;//number of seconds
afterCurrent.setSeconds(currentSecs + offset);
System.out.println("Future time is - " + afterCurrent);
time.schedule(bj, afterCurrent);//Schedule job "bj" at time = afterCurrent
//Now turn the bulb off at new time = newest afterTime
afterCurrent.setSeconds(currentSecs + 2 * offset);
System.out.println("Future time is - " + afterCurrent);
bj.setBulbStateEqualTo(false);//Task - Now turn the bulb off at time = afterCurrent
System.out.println("Main program ends");
}
}