arrayfunctions.java

import java.util.Scanner;
import java.util.Arrays;
import java.util.Collections;
import java.util.ArrayList;

public class arrayfunctions {

    public static void main(String[] args) {
        Scanner c = new Scanner(System.in);
        int n = c.nextInt();
        int[] arr = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = c.nextInt();
        }
        System.out.println("array" + Arrays.toString(arr));

        // 1. Sorting Arrays

        Arrays.sort(arr);
        System.out.println("array" + Arrays.toString(arr));

        // 2. Searching for Elements
        System.out.print("what do you want to find Enter  : ");
        int x = c.nextInt();
        int index = Arrays.binarySearch(arr, x);
        System.out.println(index);
        if (index >= 0)
            System.out.print("found " + x + "index : " + index);

        // 3. Copying Arrays

        int[] desec = Arrays.copyOf(arr, n);
        System.out.println("this is copied array : " + Arrays.toString(desec));

        // 4. Updating/Modifying Array Elements

        desec[3] = 56;
        System.out.println(Arrays.toString(desec));

        // 5. Dynamic Arrays with ArrayList

        ArrayList<String> flower = new ArrayList<>();
        flower.add("lily");
        flower.add("water lily");
        flower.add("Sunflower");
        System.out.println("ArrayList  : " + flower);
        // update
        flower.set(2, "potato");
        System.out.println("ArrayList  : " + flower);
        // Remove
        flower.remove("Sunflower");
        // check existance
        if (flower.contains("lily"))
            System.out.println("yes");
        // sort arrayList
        Collections.sort(flower);
        System.out.println("Sorted ArrayList  : " + flower);

    }
}