How do you declare, instantiate, initialize and traverse an array?

Problem statement: How will you declare, initialize & traverse an array?

1. class TestArray {
2. public static void main(String args[]) {
3. int a[] = new int[5];// declaration and instantiation.
4. a[0] = 10;// initialization.
5. a[1] = 20;
6. a[2] = 70;
7. a[3] = 40;
8. a[4] = 50;
9. }
10. }