Using Array in Java

🌱Java Array Declaration

String[] codes;
String[] codes = {"JAVA", "CSS", "JS"};
int[] nums = {1, 2, 3, 4};

🌱Accessing Array Elements

Array index numbers with n elements start from zero(0).

// (Example) 
// [0] The first element, [1] the second element, ... [n-1] the last element.

public static void main(String[] args) {
    String[] codes = {"JAVA", "CSS", "JS"};
    System.out.println(codes[0]); // JAVA
}

🌱Change Array Elements

public static void main(String[] args) {
    String[] codes = {"JAVA", "CSS", "JS"};
    codes[0] = "HTML";
    System.out.println(codes[0]); // HTML
}

🌱Array Length

public static void main(String[] args) {
    String[] codes = {"JAVA", "CSS", "JS"};
    System.out.println(codes.length); // 3
}

🌱Run Array Repeat

public static void main(String[] args) {
    String[] codes = {"HTML", "CSS", "JS"};
    for (int i = 0; i < codes.length; i++) {
        System.out.println(codes[i]); // HTML CSS JS
    }

    for (String i : codes) {
        System.out.println(i); // HTML CSS JS
    }
}