How is the isEmpty function used in Java?

There is no function called isempty in Java. However, a common method in Java to check if a string is empty is to use the isEmpty() method. This method is used to check if a given string is empty, and it returns true if the string is empty, otherwise it returns false. Here is an example:

String str = "Hello";
boolean isEmpty = str.isEmpty();
System.out.println(isEmpty); // false

String emptyStr = "";
isEmpty = emptyStr.isEmpty();
System.out.println(isEmpty); // true

In the example above, ‘str’ is a non-empty string, so the isEmpty() method will return false. On the other hand, ’emptyStr’ is an empty string, so the isEmpty() method will return true.