sort arrays in java

// how to sort an array in java without using sort() method (ascending order) public class WithoutSortMethod { public static void main(String[] args) { int temp; int[] arrNumbers = {14, 8, 5, 54, 41, 10, 1, 500}; System.out.println("Before sort: "); for(int num : arrNumbers) { System.out.println(num); } for(int a = 0; a < arrNumbers.length; a++) { for(int b = a + 1; b < arrNumbers.length; b++) { if(arrNumbers[a] > arrNumbers[b]) { temp = arrNumbers[a]; arrNumbers[a] = arrNumbers[b]; arrNumbers[b] = temp; } } } System.out.println("---------------"); System.out.println("After sort: "); for(int num : arrNumbers) { System.out.println(num); } } }

// how to sort an array of strings in descending import java.util.Arrays; import java.util.Collections; public class SortStringAlphabeticalOrder { public static void main(String[] args) { String[] strDesc = {"Bear","Fox","Deer","Cheetah","Anteater","Elephant"}; System.out.println("Before sorting: "); for(String string : strDesc) { System.out.println(string); } // arrays.sort Arrays.sort(strDesc, Collections.reverseOrder()); System.out.println("-----------------------------------"); System.out.println("Sorting string array in descending or reverse order: "); for(String string : strDesc) { System.out.println(string); } } }

// an array of ints int[] arr = {1, 2, 3, 4, 5, 6}; // an array of reverse sorted ints int[] arrDesc = Arrays.stream(arr).boxed() .sorted(Collections.reverseOrder()) .mapToInt(Integer::intValue) .toArray(); System.out.println(Arrays.toString(arrDesc)); // outputs [6, 5, 4, 3, 2, 1]

how to sort an array

import java.util.Scanner;
public class JavaExample 
{
    public static void main(String[] args) 
    {
    	int count, temp;
    	
    	//User inputs the array size
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter number of elements you want in the array: ");
        count = scan.nextInt();
    
        int num[] = new int[count];
        System.out.println("Enter array elements:");
        for (int i = 0; i < count; i++) 
        {
            num[i] = scan.nextInt();
        }
        scan.close();
        for (int i = 0; i < count; i++) 
        {
            for (int j = i + 1; j < count; j++) { 
                if (num[i] > num[j]) 
                {
                    temp = num[i];
                    num[i] = num[j];
                    num[j] = temp;
                }
            }
        }
        System.out.print("Array Elements in Ascending Order: ");
        for (int i = 0; i < count - 1; i++) 
        {
            System.out.print(num[i] + ", ");
        }
        System.out.print(num[count - 1]);
    }
}

Posted by: Guest on October-13-2020

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