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Java Regular Expression: part 2 - Matching text for validation 1

Note: All of the following code is tested in JDK 8 In previous part, I introduced basic characters as well as quantifiers. In this part, we are going to use regular expression to validate users’...

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Java Regular Expression: part 6 - Replacing text

There are many cases that we need to replace a string or certain characters. For instance, we need to replace error or redundant characters with the right ones. The java.lang.String class in Java...

Java Regular Expression: part 5 - More on grouping techniques

In the last part, we used grouping technique to optionally allow users to provide inputs. In this part, you will see that grouping technique can be applied in other cases. Another case of utilizing...