unit7_1_0.java

import java.util.ArrayList;

public class unit7_1_0 {
    public static void main(String[] args) {
        // Allow all data types
        ArrayList arrList = new ArrayList();

        arrList.add(1000);
        arrList.add("Harini");
        arrList.add(3000);

        System.out.println(arrList);

        // Allow Integer only
        ArrayList<Integer> aList = new ArrayList<Integer>();

        aList.add(1000);
        // aList.add("Harini"); // Error
        aList.add(3000);
        aList.add(600);
        aList.add(786);
        aList.add(766);
        System.out.println("aList after adding values: " + aList);

        // Set value at index 3
        aList.set(3, 2370);
        System.out.println("aList after setting index 3: " + aList);

        // Get the value at index 4
        Integer valueAt4 = aList.get(4);
        System.out.println("aList.get(4): " + valueAt4);

        // Remove value at index 2
        Integer removedValue = aList.remove(2);
        System.out.println("Removed Value of index 2: " + removedValue);
        System.out.println("aList after removing index 2: " + aList);

        // Remove value 766
        boolean removed = aList.remove(valueAt4);
        System.out.println("Is the value '" + valueAt4 + "' removed?: " + removed);
        System.out.println("aList after removing '" + valueAt4 + "': " + aList);

        // contains()
        System.out.println("Contains 10,000? " + aList.contains(10000));
        System.out.println("Contains 1000? " + aList.contains(1000));        
        
        aList.clear();
        System.out.println("aList after clear: " + aList);
        
        // contains()
        System.out.println("Contains 10,000? " + aList.contains(10000));
        System.out.println("Contains 1000? " + aList.contains(1000));      
        
        // String array list
        ArrayList<String> strList = new ArrayList<String>();
        strList.add("Harini");
        strList.add("Baskar");
        strList.add("Vadivu");
        strList.add("Diya");
        strList.add("Aathaa");

        // print strArray
        System.out.println("strList after adding values: " + strList);

        // Remove String Baska
        removed = strList.remove("Baska");
        System.out.println("Is the String 'Baska' removed?: " + removed);
        System.out.println("strList after removing 'Baska': " + strList);
        
        // Remove tring Baskar
        removed = strList.remove("Baskar");
        System.out.println("Is the String 'Baskar' removed?: " + removed);
        System.out.println("strList after removing 'Baskar': " + strList);

        System.out.println("Size of strList: " + strList.size());

        // Multi dimensional array (NOT ArrayList)
        int[] a = {1, 2, 3, 4, 5} ;
        int[] b = {6, 7, 8};
        int[] c = {9, 10};

        int[][] arr = {a, b, c};
        System.out.println("b[1]: " + b[1]);
        System.out.println("arr[1][1]: " + arr[1][1]);
        System.out.println("arr[2][1]: " + arr[2][1]);

        // Length of the array
        System.out.println("Length arr: " + arr.length);
        System.out.println("Length arr[0]: " + arr[0].length);
        System.out.println("Length arr[1]: " + arr[1].length);
        System.out.println("Length arr[2]: " + arr[2].length);

    }
}