package bubbleSort;

import java.util.Arrays;

public class TestBubbleSort {

	public static void main(String[] args) {
		int[] arr = new int[] { 9, 8, 7, 6, 5, 4, 2, 1 };
		System.out.println("The unsorted array is                          : "
				+ Arrays.toString(arr));
		System.out.println("The sorted array with bubble sort algorithm is : "
				+ Arrays.toString(BubbleSortImpl.bubbleSort(arr)));
	}
}

public class BubbleSortImpl {
    
	//bubble sort
	public static int[] bubbleSort(int[] arr) {
		int len = arr.length;
		int temp = Integer.MIN_VALUE;

		for (int i = 0; i < len - 1; i++) {
			for (int j = 0; j < len - 1 - i; j++) {
				if (arr[j + 1] < arr[j]) {
					temp = arr[j];
					arr[j] = arr[j + 1];
					arr[j + 1] = temp;
				}
			}
		}
		return arr;
	}
}


/*运行结果:
The unsorted array is                                       : [9, 8, 7, 6, 5, 4, 2, 1]
The sorted array with bubble sort algorithm is : [1, 2, 4, 5, 6, 7, 8, 9]
*/