Top 16 Java Utility Classes - Neyi Nasıl Yapsak

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Top 16 Java Utility Classes

In Java, a utility class is a class that defines a set of methods that perform common functions. This post shows the most frequently used Java utility classes and their most commonly used methods. Both the class list and their method list are ordered by popularity. The data is based on randomly selected 50,000 open source Java projects from GitHub.


Hopefully, you can get some ideas of what are already provided and popular by browsing the list so that you know you don't need to program them by yourself. The names of the methods normally indicate what they do. If the method names are not intuitive enough, you may also check out how other developers are using them in their open source projects.

1. org.apache.commons.io.IOUtils

closeQuietly ( )
toString ( )
copy ( )
toByteArray ( )
write ( )
toInputStream ( )
readLines ( )
copyLarge ( )
lineIterator ( )
readFully ( )

2. org.apache.commons.io.FileUtils

deleteDirectory ( )
readFileToString ( )
deleteQuietly ( )
copyFile ( )
writeStringToFile ( )
forceMkdir ( )
write ( )
listFiles ( )
copyDirectory ( )
forceDelete ( )

3. org.apache.commons.lang.StringUtils

isBlank ( )
isNotBlank ( )
isEmpty ( )
isNotEmpty ( )
equals ( )
join ( )
split ( )
EMPTY
trimToNull ( )
replace ( )

4. org.apache.http.util.EntityUtils

toString ( )
consume ( )
toByteArray ( )
consumeQuietly ( )
getContentCharSet ( )

5. org.apache.commons.lang3.StringUtils

isBlank ( )
isNotBlank ( )
isEmpty ( )
isNotEmpty ( )
join ( )
equals ( )
split ( )
EMPTY
replace ( )
capitalize ( )

6. org.apache.commons.io.FilenameUtils

getExtension ( )
getBaseName ( )
getName ( )
concat ( )
removeExtension ( )
normalize ( )
wildcardMatch ( )
separatorsToUnix ( )
getFullPath ( )
isExtension ( )

7. org.springframework.util.StringUtils

hasText ( )
hasLength ( )
isEmpty ( )
commaDelimitedListToStringArray ( )
collectionToDelimitedString ( )
replace ( )
delimitedListToStringArray ( )
uncapitalize ( )
collectionToCommaDelimitedString ( )
tokenizeToStringArray ( )

8. org.apache.commons.lang.ArrayUtils

contains ( )
addAll ( )
clone ( )
isEmpty ( )
add ( )
EMPTY_BYTE_ARRAY
subarray ( )
indexOf ( )
isEquals ( )
toObject ( )

9. org.apache.commons.lang.StringEscapeUtils

escapeHtml ( )
unescapeHtml ( )
escapeXml ( )
escapeSql ( )
unescapeJava ( )
escapeJava ( )
escapeJavaScript ( )
unescapeXml ( )
unescapeJavaScript ( )

10. org.apache.http.client.utils.URLEncodedUtils

format ( )
parse ( )

11. org.apache.commons.codec.digest.DigestUtils

md5Hex ( )
shaHex ( )
sha256Hex ( )
sha1Hex ( )
sha ( )
md5 ( )
sha512Hex ( )
sha1 ( )

12. org.apache.commons.collections.CollectionUtils

isEmpty ( )
isNotEmpty ( )
select ( )
transform ( )
filter ( )
find ( )
collect ( )
forAllDo ( )
addAll ( )
isEqualCollection ( )

13. org.apache.commons.lang3.ArrayUtils

contains ( )
isEmpty ( )
isNotEmpty ( )
add ( )
clone ( )
addAll ( )
subarray ( )
indexOf ( )
EMPTY_OBJECT_ARRAY
EMPTY_STRING_ARRAY

14. org.apache.commons.beanutils.PropertyUtils

getProperty ( )
setProperty ( )
getPropertyDescriptors ( )
isReadable ( )
copyProperties ( )
getPropertyDescriptor ( )
getSimpleProperty ( )
isWriteable ( )
setSimpleProperty ( )
getPropertyType ( )

15. org.apache.commons.lang3.StringEscapeUtils

unescapeHtml4 ( )
escapeHtml4 ( )
escapeXml ( )
unescapeXml ( )
escapeJava ( )
escapeEcmaScript ( )
unescapeJava ( )
escapeJson ( )
escapeXml10 ( )

16. org.apache.commons.beanutils.BeanUtils

copyProperties ( )
getProperty ( )
setProperty ( )
describe ( )
populate ( )
copyProperty ( )
cloneBean ( )

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