class Computation extends Thread { 
private int num； 
private boolean isComplete； 
private int result； 
public Computation（int num） { this.num = num； } 
public synchronized void run（） { 
result = num * 2； 
isComplete = true； 
notify（）； 
} 
public synchronized int getResult（） { 
while （!isComplete） { 
try { 
wait（）； 
} catch （InterruptedException e） { } 
} 
return result； 
} 
public static void main（String[] args） { 
Computation[] computations = new Computation [4]； 
for （int i = 0； i < computations.length； i++） { 
computations[i] = new Computation（i）； 
computations[i] .start（）； 
} 
for （Computation c ： computations） 
System.out.print（c.getResult（） +“ “）； 
} 
} 
What is the result？（）