Java实现冒泡排序示例介绍

    
    public static void sort(Comparable[] a){
        for(int i=a.length-1;i>0;i--){
            for(int j=0;j<i;j++){
                //{6,5,4,3,2,1}
                //比较索引j和索引j+1处的值
                if (greater(a[j],a[j+1])){
                    exch(a,j,j+1);
                }
            }
        }
    }

    private static  boolean greater(Comparable v,Comparable w){
        return v.compareTo(w)>0;
    }

    private static void exch(Comparable[] a,int i,int j){
        Comparable temp;
        temp = a[i];
        a[i]=a[j];
        a[j]=temp;
    }

    public static void bubbleSort(int[] data) {
        int arrayLength = data.length;
        for (int i = 1; i < arrayLength; i++) {//第i次排序
            for (int j = 0; j < arrayLength - i; j++) {//从索引为j的数开始
                if (data[j] > data[j + 1]) { //相邻元素两两对比
                    int temp = data[j + 1];  // 元素交换
                    data[j + 1] = data[j];
                    data[j] = temp;
                }
            }
            System.out.println("第" + i + "次排序：\n" + java.util.Arrays.toString(data));
        }
    }

	public class BubbleSort {
    public static void bubbleSort(int[] data) {
        	        int arrayLength = data.length;
        	        for (int i = 1; i < arrayLength; i++) {//第i次排序
        	            for (int j = 0; j < arrayLength - i; j++) {//从索引为j的数开始
        	                if (data[j] > data[j + 1]) { //相邻元素两两对比
        	                    int temp = data[j + 1];  // 元素交换
        	                    data[j + 1] = data[j];
        	                    data[j] = temp;
        	                }
        	            }
        	            System.out.println("第" + i + "次排序：\n" + java.util.Arrays.toString(data));
        	        }
        	    }
        	    public static void main(String[] args) {
        	        int[] data = {3, 44, 38, 5, 47, 15, 36, 26, 27, 2, 46, 4, 19, 50, 48};
        	        System.out.println("排序之前：\n" + java.util.Arrays.toString(data));
        	        bubbleSort(data);
        	        System.out.println("排序之后：\n" + java.util.Arrays.toString(data));
        	    }
        	}