Java algorithm to implement quick sorting through generics

Quick sorting is implemented through generics

< T extends Comparable< T>> means declaring a generic type, which Inherited Comparable (can be compared through .compareTo(x), if it is larger than Subclass
If it is < T extends Comparable< ? super T> it means it can be the parent class of T

import java.util.Arrays;
import java.util.Collection;public class QuickSort {    
public static  <T extends Comparable<T>> void myQuickSort(T[] t, int a,int b) {        
    if (a < b) {            
                  int q = Partition(t, a, b);
            myQuickSort(t, a, q - 1);
            myQuickSort(t, q + 1, b);
        }
    }    public static <T extends Comparable<T>> int Partition(T[] t, int a, int b) {        int l = a;        int r = b + 1;
              T x = t[l];        
              while (true) {            //找到比他大的或者相等的  （他比x小就继续直到找到比他大或者相等的）
            while (t[++l].compareTo(x) < 0 && l < b);            //找到比他小的或者相等的   （他比x大就继续直到找到比他小或者相等的）
            while (t[--r].compareTo(x) > 0);            
            if (l >= r) {                
                break;
            }            //如果下标正常 就交换
            swap(t, l, r);
        }        //把轴放进合适的位置，此时左边所有都比它小
        t[a] = t[r];
        t[r] = x;        
        return r;
    }    
    //java实现swap
    public static <T extends Comparable<T>> void swap(T[] data, int a, int b) {
        T t = data[a];
        data[a] = data[b];
        data[b] = t;
    }    
    public static void main(String[] args) {
        Integer a[] = {0, 2, 2, 54, 1};
        myQuickSort(a, 0, 4);
        System.out.println(Arrays.toString(a));
    }
}

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