//字符串"yekmaakkccekymbvb",求出字符串中有多少种字符,以及每个字符的个数
public class aaa {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scanner=new Scanner(System.in);
System.out.println("请输入一个字符串:");
String str=scanner.nextLine();
Map<Character, Integer> count=getCountChar(str);
System.out.println(count);
System.out.println("---------------");
System.out.println(getNumChar(str));
}
public static Map<Character, Integer> getCountChar(String str){
Map<Character, Integer> map=new HashMap<Character, Integer>();
for(int i=0;i<str.length();i++){
Character c=str.charAt(i);
Integer count=map.get(c);
map.put(c, (count==null?1:count+1));
}
return map;
}
public static int getNumChar(String str){
HashSet set=new HashSet();
char[] ch=str.toCharArray();
for(int i=0;i<ch.length;i++){
set.add(ch[i]);
}
return set.size();
}
}