java的问题，运行不了

interface Common
{
int GetSpeed();
}

class Car007 implements Common
{int A,B,C;
Car007(int a,int b,int c)
{A=a;
B=b;
C=c;}
public int GetSpeed()
{ return (A*B/C); }
}
class Plane implements Common
{int A,B,C;
Plane(int a,int b,int c)
{A=a;
B=b;
C=c;}
public int GetSpeed()
{ return (A+B+C);
}

}
public class ComputerTime
{public static void main(String[] args)
{Common cc;
int A=Integer.parseInt(args[1]);
int B=Integer.parseInt(args[2]);
int C=Integer.parseInt(args[3]);
if(args[0].equals("Car007"))
{ cc=new Car007(A,B,C);
System.out.println("Car007 time is"+1000/cc.GetSpeed());
}
else if(args[0].equals("plane"))
{ cc=new Plane(A,B,C);
System.out.println("plane time is"+1000/cc.GetSpeed());
}
}
}
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