2007-02-06から1日間の記事一覧

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java

StringUtils.leftPad(null, *, *) = null StringUtils.leftPad("", 3, "z") = "zzz" StringUtils.leftPad("bat", 3, "yz") = "bat" StringUtils.leftPad("bat", 5, "yz") = "yzbat" StringUtils.leftPad("bat", 8, "yz") = "yzyzybat" StringUtils.leftPad("…

NULLと""

java

private String emptyHoge = ""; と private String nullHoge = null; の違い空文字チェックのやつ boolean isEmpty(String str) { return str == null || str.length() == 0; } private String emptyHoge = ""; private String emptyHoge1 = ""; private St…