Java常見排序，冒泡、選擇、插入、快排

package sort;

public class MySort {
    private int[] array;
    private int length;

    /**
     * 構造函數
     * @param array
     */
    public MySort(int[] array){
        this.array = array;
        this.length = array.length;
    }

    /**
     * 打印數組中數據
     */
    public void display(){
        for(int i : array){
            System.out.print(i+" ");
        }
        System.out.println();
    }

    public static void main(String[] args){
        int[] array = {77,44,11,23,45,90,43,65,7,89,42,29,28,36,33,25,10,10,33,100};
//        int[] array = {77,44,11,23,45,90,43,65,7};
        MySort mySort = new MySort(array);
        System.out.println("排序前的數據爲：");
        mySort.display();
        mySort.quickSort(0,array.length - 1);
        System.out.println("排序後的數據爲：");
        mySort.display();
    }

    /**
     * 冒泡排序
     */
    private void bobSort() {
        for(int i = 0 ; i < array.length - 1 ; ++ i ){
            for (int j = i + 1 ; j < array.length ; ++j ){
                if(array[i] > array[j]){
                    int t = array[i];
                    array[i] = array[j];
                    array[j] = t;
                }
            }
        }
    }

    /**
     * 選擇排序
     */
    private void selectSort() {
        for (int i = 0; i < array.length - 1; ++i) {
            int minIndex = i;
            for (int j = i + 1; j < array.length; ++j) {
                if (array[minIndex] > array[j]) {
                    minIndex = j;
                }
            }
            int t = array[i];
            array[i] = array[minIndex];
            array[minIndex] = t;

        }
    }

    /**
     * 插入排序
     */
    private void insertSort(){
        for (int i = 1 ; i < array.length ; ++ i){
            int temp = array[i];
            int leftIndex = i - 1;
            while ( leftIndex >= 0 && array[leftIndex] > temp ){
                array[leftIndex+1] = array[leftIndex];
                --leftIndex;
            }
            array[leftIndex+1] = temp;
        }
    }
    /**
     * 快速排序
     */
    private void quickSort(int low ,int high){
        if(low >= high){
            return ;
        }
        int left = low;
        int right = high;
        int temp = array[left];
        int t;
        while (left < right){
            //從右往左
            while( temp <= array[right] && left < right){
                -- right ;
            }
            //從左往右
            while ( temp >= array[left] && left < right){
                ++ left;
            }
            if(left < right){
                t = array[left];
                array[left] = array[right];
                array[right] = t;
            }
        }

        array[low] = array[left];
        array[left] = temp;
        quickSort(low,left - 1);
        quickSort(left + 1,high);

    }
}