程序员女妹子求助

qq小小七

class Shape{
void draw() {}
void erase() {}
}
class Circle extends Shape{
void draw(){
System.out.println("Calling Circle.draw()");
}
void erase(){
System.out.println("Calling Circle.erase()");
}
}
class Square extends Shape{
void draw()
{
System.out.println("Calling Square.draw()");
}
void erase(){
System.out.println("Calling Square.erase()");
}
}
class Triangle extends Shape{
void draw(){
System.out.println("Calling Triangle.draw()");
}
void erase(){
System.out.println("Calling Triangle.erase()");
}
}
public class Shapes{
static void drawOneShape(Shape s)
{
s.draw();
}
static void drawShapes(Shape[] ss){
for(int i = 0 ; i < ss.length ; i ++)
{
ss.draw();
}
}
public static void main(String[] args)
{
Random rand = new Random ();//?????

Shape[] s = new Shape[9] ;
for(int i ; i < s.length ; i ++)
{
switch(rand.nextInt[3]){
case 0 : s = new Circle() ; break ;
case 1 : s = new Circle() ; break ;
case 2 : s = new Circle() ; break ;
}
}
drawShapes(s);
}
} 想知道Random那儿是什么错误

Road_7

要不把鱼币给我，哈哈

qq小小七

哈哈。我自己解决了