字符串中每个字符出现的次数

引用

public class WordCounts {
public static void main(String[] args){
String strTemp = "asdjfo8ifsdkfncnvfaklfdsa;";  
         
Map tree = new HashMap<String, Integer>();               
char ch;
for(int i = 0;i<strTemp.length();i++){
ch=strTemp.charAt(i);
if(tree.containsKey(ch)){
Integer a=(Integer)tree.get(ch)+1;
tree.put(ch, a);
}else{
tree.put(ch, 1);
}
}
Iterator itrator=tree.keySet().iterator();
while(itrator.hasNext()){
Object temp=itrator.next();
System.out.println("字符"+temp.toString()+"出现"+tree.get(temp).toString()+"次");
}
}
}