How to use java-based code for the popular leaderboards

Answer 1

The following is a way to implement the hot search leaderboard using Java:

First, use `HashMap` to store the hot search term and the number of searches. The key of `HashMap` is the hot search term, and the value is the number of searches.

```java
import java.util.HashMap;
import java.util.Map;

class HotSearchRank {
private HashMap searchMap;

public HotSearchRank() {
searchMap = new HashMap<>();
}

//Add or update search terms
public void addSearch(String term) {
searchMap.put(term, searchMap.getOrDefault(term, 0) + 1);
}

//Get the top N trending words
public Map getTopN(int n) {
return searchMap.entrySet().stream()
.sorted((e1, e2) -> e2.getValue().compareTo(e1.getValue()))
.limit(n)
.collect(HashMap::new, (m, e) -> m.put(e.getKey(), e.getValue()), Map::putAll);
}
}
```

In the code above, the `addSearch` method is used to add new search terms. If the word exists, the number of searches will be increased; if it does not exist, it will be initialised to 1. The getTopN`method is used to get the top search terms`N`before the number of searches and arrange them in descending order.

In the main function, he could simulate the input of some hot search terms and display the output of the rankings.

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