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 if (StringUtils.isEmpty(str)) {
     System.out.println(str.toUpperCase());
 }
 StringUtils.split(" abc def ") -> ["abc", "def"]
 StringUtils.split("abc def", null) -> ["abc", "def"]
 StringUtils.split("ab:cd:ef", ":") -> ["ab", "cd", "ef"]
 StringUtils.split("ab::ef", ":") -> ["ab", "ef"]
 StringUtils.join([null, "", "a", "bc"]) -> "abc"
 StringUtils.join(["a", "b", "c"], null)  -> "abc"
 StringUtils.join([null, "", "a", "bc"], ',')   -> ",,a,bc"
 Calendar cal =
     DateUtils.round(Calendar.getInstance(), Calendar.DATE)
 Calendar cal =
     DateUtils.truncate(Calendar.getInstance(), Calendar.DATE)
 Iterator days =
     DateUtils.iterator(Calendar.getInstance(), DateUtils.RANGE_WEEK_SUNDAY)		
		
			
	
		Modified by MT22(Moriwaki Takashi)
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