How do I check if a string is empty or null in Apex?

How do I check if a string is empty or null in Apex?

There are a few options to validate empty text fields in Apex: Use String. isBlank() method. This will return true if the text field is empty.

How do I get rid of white spaces in Apex?

replaceAll method accepts a regex(regular expression). We use the regex to tell the method we are looking for any and all whitespace characters using “(\\s+)”. The second parameter for the String. replaceAll method is the String we want to replace our whitespace with.

How do you remove leading and trailing spaces in Apex?

To remove leading or trailing white space characters using Apex in Salesforce, trim() is used.

How to check if string is null or empty in apex?

There’s a method isEmpty (String), which returns true if string is null or empty. Unlike isBlank (String), returns false if string is white spaces. There are also isNotEmpty () and isNotBlank (), check out the official documentation for String class in Apex

How to remove whitespaces in a string in apex?

How do we remove the whitespaces for earlier versions If going back to basics I would suggest using the trim () function followed by a regex replacement using replaceAll () that matches instances of the space characters i.e. (\\\\s+) and replaces them with a single space. Thanks for contributing an answer to Salesforce Stack Exchange!

Are there strings of zero length not equivalent to null?

“Strings of Zero Length Not Equivalent To NULL”. variable in the program if it contains an empty string. well, as shown, a varchar2 will be NULL — you would not be able to use a varchar2 variable and once assigned to a char — it’ll not be an “empty” string anymore.

How to check if a string has a space?

So the isEmpty () function is a subset of isBlank () function. In case, your check is for a null string or a string which does not contain any value (”), but in your usecase a String having a space is valid then use isEmpty ().