Java 矩形與三角形面積99/04/09

class Javafn
{
public static void main(String[] args)
{
int a,z,u;
String a1,a2;
a1=args[0];
a2=args[1];

Triangle ming1 = new Triangle();
u = ming1.Triangle(a1,a2);
System.out.println(u);

Rectangle ming2 = new Rectangle();
z = ming2.Rectangle (a1,a2);
System.out.println(z);

}
}

class Triangle
{
Triangle()
{
System.out.println("Triangle Area");
}

static int Triangle(String a1,String a2)
{
int a,b,c;
a=Integer.parseInt(a1);
b=Integer.parseInt(a2);
c=a*b/2;
return c;
}

}

class Rectangle
{
Rectangle()
{
System.out.println("Rectangle Area");
}
static int Rectangle(String a1,String a2)
{
int a,b,c;
a=Integer.parseInt(a1);
b=Integer.parseInt(a2);
c=a*b;
return c;
}

}