Bubble sort
import java.util.Arrays; public class BubbleSort { public static void main(String[] args) { int[] arr = new int[]{5,4,3,2,1}; bubbleSort(arr); System.out.println(Arrays.toString(arr)); } static void bubbleSort(int[] arr){ for(int i = 0; i < arr.length - 1;i++){ for(int j = 1; j < arr.length - i; j++){ if(arr[j] < arr[j - 1]){ int temp = arr[j]; arr[j] = arr[j-1]; arr[j-1] = temp; } } } } }