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A Complete Guide to Java Programming

Array Examples: Part 3

Explore array fundamentals in Java, focusing on declaration, fixed length constraints, and manipulation using loops and built-in methods. Understand multidimensional arrays and best practices for efficient memory use while preparing for more advanced iterative constructs.

We'll cover the following...

We have learned one key thing about arrays. There are index and value relations that are very tightly coupled together, this is an advantage. The con is that we cannot change the length of the array. At the time of declaration, initialization, and memory allocation, it is fixed.

Coding example: 37

The following example will depend on the same principles:

Java
/*
How array works : index=>element
*/
public class ExampleThirtySeven {
    public static void main (String[] args)
    {
        //declaring a certain type of array, we choose data type int
        int[] ageCollection;
        //the next step deals with allocating memory for elements, we choose 5
        ageCollection = new int[5];
        //the initialization process begins with the first element
        for (int i = 0; i <= 4; i ++){
            int j = 18;
            j = j + i;
            ageCollection[i] = j;
            System.out.println("Element at index " + i + " => " + ageCollection[i]);
        }
    }
}

Coding example: 38

We have seen how we can create ...