@@ -0,0 +1,699 @@
+import java.util.*;%0Aclass dup%7B%0A        public static void main(String%5B%5D agrs)%7B%0A                HashMap%3CCharacter,Integer%3E hm = new HashMap%3CCharacter,Integer%3E();%0A                String x = %22Hello world!123123%22;%0A                for (int i= 0;i%3Cx.length();i++)%7B%0A                        if(hm.get(x.charAt(i))==null)%7B%0A                                hm.put(x.charAt(i),1);%0A                        %7D%0A                        else%7B%0A                                hm.put(x.charAt(i), hm.get(x.charAt(i)) + 1);%0A                        %7D%0A                %7D%0A                for(Map.Entry m:hm.entrySet())%7B%0A                        System.out.println(m.getKey()+%22 %22+m.getValue());%0A                %7D%0A%0A        %7D%0A%7D%0A

Create freq.java