TopN问题

public static void getTopMaxN(int [] a){
    for (int i = a.length-1; i >0; i--) {
        for (int j = 0; j < i; j++) {
            if(a[i] 
2. 给定一组数，求最小的3个数 
public static void getTopMinN(int []a){
   for (int i = 0; i < a.length-1; i++) {
       for (int j = a.length-1; j > i ; j--) {
           if(a[i] > a[j]){
               int tmp = a[i];
               a[i] = a[j];
               a[j] = tmp;
           }
       }

       if(i == 2){
           System.out.println(a[0]);
           System.out.println(a[1]);
           System.out.println(a[2]);
           return;
       }
   }
}
 
3. 测试 
public static void main(String[] args) {
   int [] a = new int[]{0,1,9,5,10,2,90,43,1,89,23,45};
   getTopMaxN(a);
   getTopMinN(a);
}