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and Get Certified. If the string, in fact, is null, all other conditions before it will throw a NullPointerException. Share Follow edited Jun 4, 2018 at 17:23 answered Jun 3, 2018 at 4:15 shmuels If the string is neither empty nor null, then check using Lambda Expression Character::isLetter(). We can use \u0000 value to create an empty char in Java. ^ yes, that's right. How to check for null values in JavaScript ? - GeeksforGeeks If null, return false. A char cannot be null as it is a primitive so you cannot check if it equals null, you will have to find a workaround. Print true if the above condition is true. In Java, null is a literal. . It is sometimes abbreviated as NUL or referred to as a null byte. The first two answers here may be helpful for how you can either check if String letter is null first. 2013-2023 Stack Abuse. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. We equally welcome both specific questions as well as open-ended discussions. If we're at least on Java 6, then the simplest way to check for an empty string is String#isEmpty: boolean isEmptyString(String string) { return string.isEmpty (); } To make it also null-safe, we need to add an extra check: boolean isEmptyString . See in the below example, we created a single char variable ch and printed its value to check whether it has anything to print, and see it throws a compile-time error. Are there tables of wastage rates for different fruit and veg? It represents null that shows empty char. The default value is '\u0000' i.e. Check if character is null (Beginning Java forum at Coderanch) The above code example fails to compile because of an invalid character constant. Reach out to all the awesome people in our software development community by starting your own topic. Can airtags be tracked from an iMac desktop, with no iPhone? How are null characters used? Acidity of alcohols and basicity of amines. It additionally provides a few methods that we can leverage for this, including StringUtils.isEmpty() and StringUtils.isBlank(): In addition to these, their inverse methods also exist: StringUtils.isNotEmpty() and StringUtils.isNotBlank(), though, you can achieve the same functionality by using the NOT (!)