Spring - StringUtils isEmpty example

isEmpty(Object str)

Check whether the given object (possibly a String) is empty.

This method accepts any Object as an argument, comparing it to null and the empty String. As a consequence, this method will never return true for a non-null non-String object.

The Object signature is useful for general attribute handling code that commonly deals with Strings but generally has to iterate over Objects since attributes may e.g. be primitive value objects as well.

Method:

public static boolean isEmpty(@Nullable Object str)

Example:

 StringUtils.isEmpty(null) = true

 StringUtils.isEmpty("") = true

 StringUtils.isEmpty("Hello") = false