It is not the length of the StringBuilder object, but it is the number of characters its internal buffer can hold before a larger buffer needs to be reallocated. ArrayList.isEmpty () - Reference to Syntax and Examples of isEmpty () method. For Java 5 and below, we can use String#length instead. Check if Collection is Empty or Null in Java The following types are supported: CharSequence: Considered empty if its length is zero. how to check object not empty in java. How to check empty rows in excel using java | javakeypoint TJ: No, it will work just fine. In Java, a built-in method is available to check if a String is empty before performing any operations. Check If a String is Empty or Null in Java Let's start by defining a simple method that will check if the value we pass is null or an empty String: private static double parseStringToDouble(String value) { return value = = null . isNotEmptyOrNull(final CharSequence cs) - Checks if a CharSequence is not empty ("") and not null. Using Java 8. java check object is null. .NET Framework 4 introduces a new method on its String class called IsNullOrWhiteSpace that checks whether a provided String is null . Check if HashMap is Empty Example - Java Code Examples Pandas how to find column contains a certain value Recommended way to install multiple Python versions on Ubuntu 20.04 Build super fast web scraper with Python x100 than BeautifulSoup How to convert a SQL query result to a Pandas DataFrame in Python How to write a Pandas DataFrame to a .csv file in Python Step 5 - Display the result Step 6 - Stop. Collection: Considered empty if it has zero elements. Checking for Null or Empty or White Space Only String in Java.