62,615
社区成员
发帖
与我相关
我的任务
分享
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class MyHashMap {
private HashMap<String, List> map = new HashMap<String, List>();
public void put(String key, String value) {
List list = null;
if (map.get(key) == null) {
list = new ArrayList();
list.add(value);
map.put(key, list);
} else {
list = map.get(key);
list.add(value);
}
}
public List get(String key) {
List list = map.get(key);
return list;
}
public int size() {
return map.size();
}
public int length(String key){
List list = map.get(key);
return list.size();
}
}