救命啊迭代器问题！！ - 黑马程序员技术交流社区

import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.*;
import javax.swing.text.html.HTMLDocument.Iterator;
public class Test7
{
public static void main(String[] args)
{
charCount("aabbccddd");
}
public static String charCount(String str)
{
char[] ch = str.toCharArray();
TreeMap<Character,Integer> tm = new TreeMap<Character,Integer>();
for(int i = 0;i<ch.length;i++)
{
Integer value = tm.get(ch[i]);
if(value == null)
{
tm.put(ch[i], 1);
}
else
{
value = value + 1;
tm.put(ch[i], value);
}
}
StringBuilder sb = new StringBuilder();
Set<Map.Entry<Character,Integer>> entrySet = tm.entrySet();
Iterator<Map.Entry<Character,Integer>> it = entrySet.iterator();//The type HTMLDocument.Iterator is not generic; it cannot be parameterized with arguments <Map.Entry<Character,Integer>>
return null;
}
}

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