java编写一个:去掉数组或集合中重复次数最少的数据

去掉数组或集合中重复次数最少的数据
例如：
输入：1 1 1 2 4 4 6 7
输出：2 6 7

http://blog.csdn.net/small_mouse0/article/details/77543447

提供了三种方法，，题主看到懂了，改一改就ok了

List list = new ArrayList();
list.add(1);
list.add(1);
list.add(2);
list.add(2);
list.add(4);
list.add(4);
list.add(6);
list.add(7);
System.out.println(list.toString());
Set sets = new HashSet(list);
System.out.println(sets.toString());

package hello;

import java.util.HashMap;
import java.util.Collections;

public class Demo{
    public static void main(String[] argv) {
        int[] nums = {1, 1, 1, 2, 4, 4, 6, 7};
        Counter counter = new Counter();
        for(int i : nums) {
            counter.put(i);
        }

        int min_count = (int)Collections.min(counter.values());
        Object[] keys = counter.keySet().toArray();
        for(Object i: keys) {
            int value_count = counter.get(i);
            if (value_count != min_count) {
                counter.remove(i);
            }
        }

        for(int i: counter.keySet()) {
            System.out.println(i);
        }
    }
}


class Counter extends HashMap<Integer, Integer>{
    private static final long serialVersionUID = 1L;

    public void put(int value) {
        int count = 0;
        if (this.containsKey(value)) {
            count = this.get(value);
            count += 1;
            this.put(value, count);
        }else {
            count = 1;
            this.put(value, count);
        }
    }
}

public class Test {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请您输入字符串：");
String str = scanner.nextLine();
String result = getLeastRepeat(str);
System.out.println("重复最少的数据是：" + result);
}

public static String getLeastRepeat(String str) {
    String result = "";
    if (str == null || str.trim().equals("")) {
        return result;
    }
    String replaceStr = str.trim().replace(" ", ";");
    String[] strArr = replaceStr.split(";");
    if (strArr.length == 1) {
        return strArr[0];
    }
    Map<String, Integer> map = new HashMap<>();
    for (String example : strArr) {
        if (example == null || example.equals("")) {
            continue;
        }
        Integer count = map.get(example);
        if (count == null) {
            map.put(example, 1);
        } else {
            map.put(example, count + 1);
        }
    }
    System.out.println(JSON.toJSONString(map));
    if (map.size() == 0) {
        return result;
    } else if (map.size() == 1){
        return map.keySet().toString();
    }
    Integer leastCount = 0;
    for (Integer count : map.values()) {
        if (leastCount == 0) {
            leastCount = count;
            continue;
        }
        if (count < leastCount) {
            leastCount = count;
        }
    }
    for(Map.Entry<String, Integer> entry : map.entrySet()) {
        if (entry.getValue() == leastCount) {
            result += entry.getKey() + " ";
        }
    }
    if (!result.equals("")) {
        result = result.substring(0, result.length() - 1);
    }
    return result;
}

}