Arrays

Arrays

An array stores a fixed-size sequence of elements of the same type:

int[] nums = {5, 2, 8, 1, 9};
String[] names = {"Alice", "Bob", "Charlie"};
double[] prices = new double[3];  // filled with 0.0

Access elements by index (0-based):

nums[0]   // 5
nums[4]   // 9
nums.length  // 5 (not a method call — it's a field)

java.util.Arrays

The Arrays utility class provides sorting and printing:

import java.util.Arrays;

int[] arr = {3, 1, 4, 1, 5};
Arrays.sort(arr);                  // sorts in place
System.out.println(Arrays.toString(arr));  // [1, 1, 3, 4, 5]

2D Arrays

int[][] grid = {{1, 2}, {3, 4}, {5, 6}};
System.out.println(grid[1][0]);  // 3

Your Task

Given nums = {5, 2, 8, 1, 9, 3}:

1. Print its length
2. Print the first element
3. Sort it, then print Arrays.toString result
4. Print the first element after sorting