【文件属性】：
文件名称：java桑硅谷 day23 晨考.zip
文件大小：7KB
文件格式：ZIP
更新时间：2023-02-11 04:47:56
java
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;
public class TestTreeMap {
public static void main(String[] args) {
TreeMap
> map = new TreeMap<>();
ArrayList bj = new ArrayList<>();
bj.add(new City(1,"北京市"));
ArrayList tj = new ArrayList<>();
tj.add(new City(4,"天津市"));
ArrayList hn = new ArrayList<>();
hn.add(new City(2,"海口市"));
hn.add(new City(3,"三亚市"));
map.put(new Province(1,"北京市"),bj);
map.put(new Province(2,"海南省"),hn);
map.put(new Province(3,"天津市"),tj);
Set>> entrySet=map.entrySet();
for (Entry> entry : entrySet) {
System.out.println(entry.getKey());
ArrayList value = entry.getValue();
for (City city : value) {
System.out.println("\t"+city);
}
}
}
}
【文件预览】：
java桑硅谷 day23 晨考
----.project(381B)
----bin()
--------test2()
----.settings()
--------org.eclipse.jdt.core.prefs(598B)
----src()
--------test2()
----.classpath(301B)
