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java 固定長文字列の中身の有無を調べる方法

Java

Posted at 2020-08-14

        String sti = "     ";
        //スペースをtrimする
        //その結果、ブランクであるかどうか
        if(sti.trim().isEmpty()) {
            System.out.println("blank");
        }else {
            System.out.println("notBlank");
        }

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