输入一个字符串，统计每个字符出现的次数

public class charCount{
    public static void main(String []agrs){
        String strs1="asweasdxc";
        int count=0;
        while(strs1.length()>0){
            //将第一个字母变为字符串
            String first  = String.valueOf(strs1.charAt(0));
            //将第一个字符相同的替换为空字符串
            String newString = strs1.replaceAll(first, "");
            count = strs1.length() - newString.length();
            strs1 = newString;
            System.out.println(first+"出现了"+count+"次");
        }
    }
}