Java 选择排序

public class Selection {
    //对数组a中的元素进行排序
    public static void sort(Comparable[] a){
        for(int i=0;i<a.length-2;i++){
            int minIndex=i;
            for(int j=i+1;j<a.length;j++){
                if(greater(a[minIndex],a[j])){
                    minIndex=j;
                }
            }
            exchange(a,i,minIndex);
        }
    }
    private static boolean greater(Comparable v,Comparable w){
        return v.compareTo(w)>0;
    }
    private static void exchange(Comparable[] a,int i,int j ){
        Comparable t=a[i];
        a[i]=a[j];
        a[j]=t;
    }
}
class Test{
    public static void main(String[] args) {
        Integer[] a={4,6,8,7,9,2,10,1};
        Selection.sort(a);
        System.out.println(Arrays.toString(a));
    }
}