zipZap

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Look for patterns like "zip" and "zap" in the string -- length-3, starting with 'z' and ending with 'p'. Return a string where for all such words, the middle letter is gone, so "zipXzap" yields "zpXzp".

zipZap("zipXzap") → "zpXzp"
zipZap("zopzop") → "zpzp"
zipZap("zzzopzop") → "zzzpzp"

public String zipZap(String str)

{

  String temp=str,res="";

  int j=temp.length();

  int i=0;

  while(i<j-2)

  {

      if(temp.charAt(i)=='z' && temp.charAt(i+2)=='p')

     {

         res=res+temp.substring(0,i+1);

         temp=temp.substring(i+2);

         j=temp.length();

         i=0;

      }

     i++;

  }

res=res+temp;  return res;

}