java - How to replace a repeating char at only a particular place in String? -

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i have string : hi/i/jack/there

which contains multiple '/' between values. , these values not of fixed length(can length)

and need replace second occurrence of '/' string means output should be.. hi/iamjack/there

how should achieve this? tried string.replace , logic it's replacing occurrences need 2nd occurrence replace. , i'm restricted use string only(not stringbuilder or else)

count / each element in string

    string s = "hi/i/jack/there";      for(int i=0,count=0;i<s.length();i++)     {         if(s.charat(i)=='/')// if i'th element '/'         {             count++;             if(count==2)//it's second '/'             {                 //separate 2 part second '/' , add want @ middle                 s = s.substring(0,i) + "am" +s.substring(i+1,s.length());                                 }         }     }

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