object EmptyStringExtensions { extension (str: String) def isEmptyOrWhitespace: Boolean = str.trim.isEmpty def isNullOrEmptyOrWhitespace: Boolean = str == null || str.isEmptyOrWhitespace } We must import EmptyStringExtensions to use the methods we defined above: import EmptyStringExtensions._ cl...
} // method check if string is null or empty public static String isNullEmpty(String str) { // check if string is null if (str == null) { return "NULL"; } // check if string is empty else if(str.isEmpty()){ return "EMPTY"; } else { return "neither NULL nor EMPTY"; } ...
Example 2 : React check if string is null or empty In this second example of this tutorial, we use React JS to check if a string is empty or null using a simple condition. The condition is !str || str.trim() === "", which means that the string is either falsy (such as null,...
public static void main(String[] args) { String str1 = null; String str2 = ""; String str3 = "Hello, World!"; // Check if str1 is null or empty if (str1 == null || str1.length() == 0) { System.out.println("str1 is null or empty."); } else { System.out.println(...
if a 'string' is 'null' or empty (="") then code " 'string' <> nothing" is ignored Closed - Not Enough Info24 0Votes TLTom Loewen -Reported Nov 16, 2023 10:44 PM [severity:It’s more difficult to complete my work]
Check if a string is null or empty in XSLT 多条件查询 string.Format("/root/deviceList//item/guid[{0}]", strBuilder.ToString()) "/root/deviceList//item/guid[text()=\"h\" or text()=\"a\" or text()=\"c\"]"谓词嵌套var nodes = xmlDoc.SelectNodes(string.Format("/root/device...
Checking if String is NULL or EMPTY in SQL Cleaning strings of escape characters before passing to sql Column 'coloumname' does not belong to table categories . Column names in each table must be unique error... Combine first and last name columns in linq Command...
Checking if a string is NULL or EMPTY is very common requirement in Powershell script. If we don’t do that we will end up with run time errors if we try to perform some operation on that string variable which is empty or null. So the question now is, how to check it?
Using the isEmpty() method: The isEmpty() method is a built-in method provided by the String class in Java. It returns a boolean value indicating whether the string is empty or not. This method checks if the length of the string is zero. String str1 = ""; String str2 = "Hello...
工具类的方法内部通常也只是对 null 和 isEmpty() 进行判断，因此，直接使用原生方法更加直接和高效。4、保持项目的一致性 在整个项目中保持一致的代码风格是至关重要的。如果你的项目广泛使用工具类，那么在所有相关代码中保持使用工具类的方法有助于代码的统一性和可维护性。如果项目中已经大量使用了 CollectionUtils...