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changePi Challenge

gudii9
gudii9 asked
on
1,185 Views
Last Modified: 2016-09-20
Hi,

I am working on below challenge
http://codingbat.com/prob/p170924

Psedo code:

1. if array length is zero return ""
2. if array length is 1  return same str
3. else find location of pi and replace with 3.14 if greater than length
4. return replaced string

I wrote my code as below

public String changePi(String str) {
   if(str.length()==0){
    return "";
  }
  if(str.length()==1){
    return str;
  }
  if(str.length()==2&&"pi".equals(str)){
    return "3.14";
  }
   if(str.length()==1&&!"x".equals(str)){
    return str;
  }
   if(str.length()>1){
    return str.replace("pi","3.14");
  }
  
  
  return null;
}

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I am passing all tests

How to improve/modify my design, code and any other alternate approaches. please advise
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