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Kathy Sierra Regex Self Study Guide Problem

 
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Hi. i am studying from Kathy Book for SCJP. and i dont understand the question post at page 515 the first one of study guide.


getting print.
0 //i Understand this. start= 0; group = empty.
1 //i Understand this. start= 1; group = empty.
2 34 //i Understand this. start= 2; group = 34
4 //i dont Understand this. start= 4; group = empty. INDEX = 4??? character 'e' ???;
5 //i dont Understand this. start= 5; group = empty. INDEX = 5??? character 'f' ???;
6 //i dont Understand this. start= 6; group = empty. INDEX = 6??? character '???' ???; Index 6 the string have length() == 5;

i need help. any help would be appreciate.

sorry by my poor english.
best regards form Venezuela.
Christian Daniel Ortiz Cuellar


 
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https://coderanch.com/how-to/java/SCJP-FAQ#kb-regexp
 
Cristian Daniel Ortiz Cuellar
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Henry Wong wrote:https://coderanch.com/how-to/java/SCJP-FAQ#kb-regexp



Thanks a lot henry
 
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