如何在Java中初始化数组？

Question

I am trying to declare an Array of Rectangles in java but I can't figure out how. Here is my code:

private Rectangle rectArray[] = new Rectangle[9];
rectArray[0] = new Rectangle(0,0,0,0);

I tried commenting out the second line and it works fine, but when I leave the second line in, it has the error:

Syntax error on token ";" expected {

It's not declaring the Array that's the problem; initializing it is the problem. How can I fix this error?

Answer 1

private Rectangle rectArray[] = new Rectangle[9];
rectArray[0] = new Rectangle(0,0,0,0);

You have to initialize within constructor (generally constructor (or even initilisation block) than method for init).
In your case, you mixed field (as suggested by your private keyword) with computation, leading to the compilation error you got.

You may want to do:

MyClass {

     private Rectangle rectArray[] = new Rectangle[9];

     MyClass() {
      rectArray[0] = new Rectangle(0,0,0,0);
     }
   }