You can clearly see that there is a string str3 with empty spaces and it returns false because it does not come under the empty check and . It is used to check whether the specified string is null or an Empty string. Calling a method in an instance fashion to check for null should throw a null pointer exception if it's null. Output. A Consistent Way of Doing Null Checks and Empty Checks on Objects Otherwise, return false. >>>Return to Java Basics Tutorial Page In the above program we simply create a null string, empty string, string with spaces and string with value "Java". You can use the boolean value as a condition for what the statement does next. Result will be a boolean. Check if HashMap is Empty Example - Java Code Examples 1.使用する String.isEmpty() 方法. This is the case when array contains null values. how to check object not empty in java. Check If a String is Empty or Null in Java This however is different. TJ: No, it will work just fine. java object is null. The compiler changes it to a static call which accepts null arguments just fine like any other method. java check if null or empty - upnorthartsinc.com How to check if a variable is null or empty string or all ... - NewbeDEV Check if a String is empty ("") or null in Java; Check if a String is whitespace, empty ("") or null in Java; Java Program to check if a string is empty or not; Check if a directory is not empty in Java; What is difference in Python operators != and "is not"? .NET Framework 4 introduces a new method on its String class called IsNullOrWhiteSpace that checks whether a provided String is null .