Adding java code

002_ARRAY/001_Initializing_Array_ADT/Main.java

@@ -0,0 +1,35 @@
+import java.util.Scanner;
+
+class Array {
+    private int[] array;
+    private int size;
+    private int length;
+
+    public Array() {
+        this.size = 13;
+        this.length = 0;
+        this.array = new int[this.size];
+    }
+
+    public Array(int size) {
+        this.size = size;
+        this.length = 0;
+        this.array = new int[this.size];
+    }
+}
+
+public class Main {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        Array arr1, arr2;
+
+        System.out.print("Enter size: ");
+        int size = scanner.nextInt();
+
+        arr1 = new Array(size);
+        arr2 = new Array();
+
+        scanner.close();
+    }
+}

002_ARRAY/002_Displaying_an_Array/Main.java

@@ -0,0 +1,38 @@
+public class Main {
+    public static void main(String[] args) {
+        Array arr = new Array();
+        arr.displayAllElements();
+    }
+}
+class Array {
+    private int[] array;
+    private int size;
+    private int length;
+
+    public Array() {
+        this.size = 13;
+        this.length = 13;
+        this.array = new int[this.size];
+        for (int i = 0; i < this.size; i++) {
+            this.array[i] = i;
+        }
+    }
+
+    public Array(int size) {
+        this.size = size;
+        this.length = 0;
+        this.array = new int[this.size];
+    }
+
+    public void displayAllElements() {
+        if (length == 0) {
+            System.out.println("No elements in array.");
+        } else {
+            System.out.print("Elements of array are: ");
+            for (int i = 0; i < length; i++) {
+                System.out.print(array[i] + " ");
+            }
+            System.out.println();
+        }
+    }
+}