Array index is starting at array index 0 : Array Dimension « Java Source And Data Type « SCJP

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2. Java Source And Data Type
3. Array Dimension

public class MainClass {

  public static void main() {
    long[] squares;
    squares = new long[6000];
    for (int i = 0; i < 6000; i++) {
      squares[i] = i * i;
    }
  }
}