Sorting Java Tutorial

LearnSort.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;


/**
 *
 * @author ilhamarrouf
 */
public class LearnSorting {
    static InputStreamReader inputStreamReader = new InputStreamReader(System.in);
    static BufferedReader input = new BufferedReader(inputStreamReader);
    static int[] arr = new int[5];
    static boolean isRunning = true;

    public static void main(String[] args) throws IOException {
        do {
            ArrayList al = new ArrayList();
            System.out.println("Selamat Datang di Program Simulasi \nMenu");
            System.out.println("1. Random Data");
            System.out.println("2. Simulasi Bubble Sort - Ascending");
            System.out.println("3. Simulasi Selecion Sort – Ascending");
            System.out.println("4. Simulasi Bubble Sort – Descending");
            System.out.println("5. Simulasi Selection Sort – Descending");
            System.out.println("6. Keluar");
            System.out.print("Masukkan pilihan anda : ");

            int selectedMenu = Integer.valueOf(input.readLine());

            switch (selectedMenu) {
                case 1:
                    int botomLimit, topLimit, range, resultRandom;
                    Scanner input = new Scanner(System.in);

                    System.out.print("Batas Bawah : ");
                    botomLimit = input.nextInt();
                    System.out.print("Batas Atas : ");
                    topLimit = input.nextInt();

                    Random random = new Random();

                    for (int counter = 0; counter < 5; counter++) {

                        range = topLimit - botomLimit + 1;
                        resultRandom = random.nextInt(range);

                        arr[counter] = resultRandom;
                    }

                    System.out.print(Arrays.toString(arr));
                    System.out.println(" ");
                    break;
                case 2:
                    System.out.println("\nProses Bubble Sort secara Ascending:");
                    for (int a = 0; a < 4; a++) {
                        System.out.println("Pass " + (a + 1));

                        for (int b = 0; b < arr.length - 1; b++) {
                            if (arr[b] > arr[b + 1]) {
                                int temp = arr[b];
                                arr[b] = arr[b + 1];
                                arr[b + 1] = temp;
                            }

                            System.out.println(Arrays.toString(arr));
                        }
                        System.out.println();
                        System.out.print("Result of Pass "+ (a+1) + "\n");
                        printResult();
                        System.out.print("\n");
                    }

                    System.out.println("Hasil Akhir Bubble Sort Ascending: " + Arrays.toString(arr) + "\n");
                    break;
                case 3:
                    System.out.println("\nProses Selection Sort secara Ascending:");
                    int patch;

                    for (int i = 0; i < arr.length - 1; i++) {
                        int index = i;

                        System.out.println("Pass " + (i + 1));

                        for (int j = i + 1; j < arr.length; j++) {
                            if (arr[j] < arr[index]) {
                                index = j;
                            }

                            if (index != i) {

                                patch = arr[i];
                                arr[i] = arr[index];
                                arr[index] = patch;
                            }

                            System.out.println(Arrays.toString(arr));
                        }

                        System.out.println();
                        System.out.print("Result of Pass "+ (i+1) + "\n");
                        printResult();
                        System.out.print("\n");
                    }
                    System.out.println("Hasil Akhir Selection Sort Ascending: " + Arrays.toString(arr) + "\n");
                    break;
                case 4:
                    System.out.println("\nProses Bubble Sort secara Descending:");
                    for (int a = 0; a < 4; a++) {
                        System.out.println("Pass " + (a + 1));

                        for (int b = 0; b < arr.length - 1; b++) {
                            if (arr[b] < arr[b + 1]) {
                                int temp = arr[b];
                                arr[b] = arr[b + 1];
                                arr[b + 1] = temp;
                            }

                            System.out.println(Arrays.toString(arr));
                        }
                        System.out.println();
                        System.out.print("Result of Pass "+ (a+1) + "\n");
                        printResult();
                        System.out.print("\n");
                    }

                    System.out.println("Hasil Akhir Bubble Sort Descending: " + Arrays.toString(arr) + "\n");
                    break;
                case 5:
                    System.out.println("\nProses Selection Sort secara Descending:");

                    for (int i = 0; i < arr.length - 1; i++) {
                        int index = i;

                        System.out.println("Pass " + (i + 1));

                        for (int j = i + 1; j < arr.length; j++) {
                            if (arr[j] > arr[index]) {
                                index = j;
                            }

                            if (index != i) {

                                patch = arr[i];
                                arr[i] = arr[index];
                                arr[index] = patch;
                            }

                            System.out.println(Arrays.toString(arr));
                        }

                        System.out.println();
                        System.out.print("Result of Pass "+ (i+1) + "\n");
                        printResult();
                        System.out.print("\n");
                    }
                    System.out.println("Hasil Akhir Selection Sort Descending: " + Arrays.toString(arr) + "\n");
                    break;
                case 6:
                    System.exit(0);
                    break;
                default:
                    System.out.println("Pilihan salah!");
            }
        } while (isRunning);
    }

    static void printResult(){
        for (int i=0;i< arr.length ;i++){
            System.out.print(arr[i]+ " ");
        }

        System.out.print("\n");
    }
}