I have added the dependency in pom.xml
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Commons-lang 2.5.jar free download. Bulk Extension Changer This simple tool allows you to change the extensions of files in a given directory (and subdirectori commons-lang 2.5.jar free download - SourceForge.
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but when i update maven dependencies and import the EscapeStringUtils using
i get it red underlined and error which states :
Jar file is there (downloaded) now how can i fix it, i have no idea.Kindly help me.
Thanks
4 Answers
Thanks for all replies, i solved it by downloading manually the .jar file from the following link and overwrite the existing jar downloaded by maven. (i don't know why it started working after manual download, but after all, its working)
If you sure that jar file includes StringEscapeUtils in the classpath you should clean the project.
Delete contents inside .m2repositoryorgapachecommonscommons-lang3.
Update project - Go to eclipse project -> maven -> Update Project and Check force update.
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I'm a beginner in Java. I want to use StringUtils.replace but Eclipse outputs 'StringUtils cannot be resolved'.
I tried import java.lang.*;, but it doesn't work.
7 Answers
java.lang does not contain a class called StringUtils. Several third-party libs do, such as Apache Commons Lang or the Spring framework. Make sure you have the relevant jar in your project classpath and import the correct class.
StringUtils is an Apache Commons project. You need to download and add the library to your classpath.
To use:
StringUtils is in org.apache.commons.lang.* not in java.lang.*. Most importantly learn to read javadoc file. All java programmers after learning basic java learn to read javadoc, execute tests from public projects, use those jars in their projects.
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If you are working on eclipse or netbeans you can make a directory (folder) called lib in your project (from within the IDE) and copy the downloaded jar from hard disk and paste it in that directory from eclipse or netbeans. Next you have to add it to your project.
E.g in case of eclipse from Project->Properties select Java Build Path -> Add Jars, point to the jar you copied earlier. In your case it might be commons-lang-version.jar.
After this step whenever you add above import in a java file, those libraries will be available on your project (in case of eclipse or netbeans).
From where do you get the jar for commons-lang?Root directory of any apache commons is http://commons.apache.org/And for commons-lang it is http://commons.apache.org/lang/
Some of these libraries contain User Guide and other help to get you started, but javadoc is the ultimate guide for any java programmer.
It is right time you asked about this library, because you should never re-invent the wheel. Use apache commons and other well tested libraries whenever possible. By using those libraries you omit some common human errors and even test those libraries (using is testing). Sometimes in future when using this library, you may even write some modifications or addition to this library. If you contribute back, the world benefits.
Most common use of StringUtils is in web projects (when you want to check for blank or null strings, checking if a string is number, splitting strings with some token). StringUtils helps to get rid of those nasty NumberFormat and Null exceptions. But StringUtils can be used anywhere String is used.
StringUtils is a utility class from Apache commons-lang (many libraries have it but this is the most common library). You need to download the jar and add it to your applications classpath.
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If you're developing for Android there is TextUtils class which may help you:
It is really helps a lot to check equality of Strings.
For example if you need to check Strings s1, s2 equality (which may be nulls) you may use instead of
this simple method:
As for initial question - for replacement it's easier to use s1.replace().
The mostly used StringUtils class is the Apache Commons Lang StringUtils (org.apache.commons.lang3.StringUtils). To use this class you first have to download the Apache Commons Lang3 package then you have to add it to your project libraries.
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You can go to this link to get more details: http://examples.javacodegeeks.com/core-java/apache/commons/lang3/stringutils/org-apache-commons-lang3-stringutils-example/
StringUtils is part of Apache Commons Lang (http://commons.apache.org/lang/, and as the name suggest it provides some nice utilities for dealing with Strings, going beyond what is offered in java.lang.String. It consists of over 50 static methods.
There are two different versions available, the newer org.apache.commons.lang3.StringUtils and the older org.apache.commons.lang.StringUtils. There are not really any significant differences between the two. lang3.StringUtils requires Java 5.0 and is probably the version you'll want to use.
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