troubleshooting Question

xyzMiddle java challenge

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gudii9Flag for United States of America asked on
Java EEJavaProgrammingProgramming Languages-OtherJava App Servers
33 Comments1 Solution576 ViewsLast Modified:
Hi,
I am working on below challenge
http://codingbat.com/prob/p159772
I tried my code as below
public boolean xyzMiddle(String str) {
 int len = str.length();
 int lenMid = len / 2;
 int lenMidAssumeMax = lenMid + 1;
 int lenMidAssumeMin = lenMid - 1;
 int yPos = str.indexOf('y');
 if (yPos == lenMid || yPos == lenMidAssumeMax || yPos == lenMidAssumeMin) {
  return true;
 }

 return false;

}
I am getting below result
Expected      Run            
xyzMiddle("AAxyzBB") → true      true      OK         
xyzMiddle("AxyzBB") → true      true      OK         
xyzMiddle("AxyzBBB") → false      true      X         
xyzMiddle("AxyzBBBB") → false      false      OK         
xyzMiddle("AAAxyzB") → false      true      X         
xyzMiddle("AAAxyzBB") → true      true      OK         
xyzMiddle("AAAAxyzBB") → false      true      X         
xyzMiddle("AAAAAxyzBBB") → false      true      X         
xyzMiddle("1x345xyz12x4") → true      true      OK         
xyzMiddle("xyzAxyzBBB") → true      false      X         
xyzMiddle("xyzAxyzBxyz") → true      false      X         
xyzMiddle("xyzxyzAxyzBxyzxyz") → true      false      X         
xyzMiddle("xyzxyzxyzBxyzxyz") → true      false      X         
xyzMiddle("xyzxyzAxyzxyzxyz") → true      false      X         
xyzMiddle("xyzxyzAxyzxyzxy") → false      false      OK         
xyzMiddle("AxyzxyzBB") → false      false      OK         
xyzMiddle("") → false      true      X         
xyzMiddle("x") → false      true      X         
xyzMiddle("xy") → false      true      X         
xyzMiddle("xyz") → true      true      OK         
xyzMiddle("xyzz") → true      true      OK         
other tests
X      

how to  improve my approach, results and design of this challenge. How do i make a graphical venn or flow chart or some other relevant diagram to design it before writing code to decide best strategy?
 Please advise
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