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@narikei(なりたけいすけ)

【Java】StringUtilsのisBlankとisEmptyの違い

Java

Last updated at 2022-05-04Posted at 2015-07-03

isEmptyはnullと空文字列をチェックする

StringUtils.isEmpty(null)      => true
StringUtils.isEmpty("")        => true
StringUtils.isEmpty(" ")       => false !
StringUtils.isEmpty("bob")     => false
StringUtils.isEmpty("  bob  ") => false

isBlankは空白文字もチェックされ`true`になる

StringUtils.isBlank(null)      => true
StringUtils.isBlank("")        => true
StringUtils.isBlank(" ")       => true !
StringUtils.isBlank("bob")     => false
StringUtils.isBlank("  bob  ") => false

##ドキュメント
https://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/StringUtils.html

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