CCF 考试，一定要刷历年真题。 在提交代码的时候，一定不要把中文注释提交上去了，可能会编译报错
题目描述 201312-1出现次数最多的数 Java题解 import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Scanner; /** * * @author wangdong * */ public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int num = scanner.nextInt(); scanner.nextLine(); String str = scanner.nextLine(); scanner.close(); HashMap<Integer, Integer> map = new HashMap<Integer, Integer>(num); String[] numsStrings = str.split(" "); for (int i = 0; i < num; i++) { Integer keyInteger = Integer.valueOf(numsStrings[i]); if (map.containsKey(keyInteger)) { Integer tar = map.get(keyInteger); map.put((keyInteger), map.get(keyInteger)+1); }else { map.put(keyInteger, 1); } } List<Integer> keyStrings = new ArrayList<Integer>(); Integer maxNume = 0; for (Integer integer : map.keySet()) { Integer nuInteger = map.get(integer); if (nuInteger > maxNume) { maxNume = nuInteger; } } for (Integer integer : map.keySet()) { Integer nuInteger = map.get(integer); if (nuInteger == maxNume) { keyStrings.add(integer); } } int result = keyStrings.get(0); if (keyStrings.size()>1) { for (int i = 1; i < keyStrings.size(); i++) { if (keyStrings.get(i)<result) { result = keyStrings.get(i); } } } System.out.println(result); } }好啦，祝大家都能学习愉快！
