我的比较暴力哈哈 import java.util.ArrayList; import java.util.Arrays; import java.util.Scanner; public class baidu {       public static void main(String[] args)       {      Scanner scanner=new Scanner(System.in);      while (scanner.hasNext()) { int n=scanner.nextInt(); int[] num=new int[n]; for (int i = 0; i < n; i++) { num[i]=scanner.nextInt(); } System.out.println(sanMax(num)); }       } private static int sanMax(int[] num) { // TODO Auto-generated method stub int temp=-1; Arrays.sort(num); int max=num[0]; int count=1; for (int i = 1; i < num.length; i++) { if (max<num[i]&&count<=2) { count++; max=num[i]; } } if (count==3) { return max; } else { return temp; } } }