请您帮我找出为什么此代码只显示一个姓氏,我需要显示所有具有最大值的人 我进行了测试,发现它找到了最大值,进行了比较,但只显示了一个姓氏
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.*;
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new FileReader(args[0]));
TreeMap<String, Double> map = new TreeMap<>();
ArrayList<String> sArray = new ArrayList<>();
while (reader.ready()) {
String st = reader.readLine();
sArray.add(st);
}
for (String s : sArray) {
String[] array = s.split(" ");
String name = array[0];
double price = Double.parseDouble(array[1]);
if (map.containsKey(name)) {
price = price + map.get(name);
}
map.put(name, price);
}
Double maxValueInMap = (Collections.max(map.values())); // This will return max value in the Hashmap
System.out.println(maxValueInMap);
for (Map.Entry<String, Double> entry : map.entrySet()) {
System.out.println(entry.getKey() + " - " + entry.getValue() + " | " + (entry.getValue()==maxValueInMap));// Itrate through hashmap
if (entry.getValue() == maxValueInMap) {
System.out.println(entry.getKey()); // Print the key with max value
}
}
reader.close();
}
最佳答案
您应该使用.equals()
而不是==
来比较数字对象:
for (Map.Entry<String, Double> entry : map.entrySet()) {
System.out.println(entry.getKey() + " - " + entry.getValue() + " | " + (entry.getValue().equals(maxValueInMap)));// Itrate through hashmap
if (entry.getValue().equals(maxValueInMap)) {
System.out.println(entry.getKey()); // Print the key with max value
}
}
关于java - 找到Hashmap中的几个最大值,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53944789/