将字符串值替换为哈希映射中的值

import java.util.HashMap;class Program{    public static void main(String[] args)    {        String pattern = "Q01 + Q02";        String result = "";        HashMap<String, String> vals = new HashMap<>();        vals.put("Q01", "123");        vals.put("Q02", "123");        for(HashMap.Entry<String, String> val : vals.entrySet())        { result = pattern.replace(val.getKey(), val.getValue()); pattern = result;        }        System.out.println(result);    }}