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Frequently Asked Questions

What is a NullPointerException, and how do I Fix It?

NullPointerException is a runtime exception and it is thrown when the application try to use an object reference which has a null value. For example, using a method on a null reference. How do I fix TLauncher in Java Lang NullPointerException? Set the correct date and time on your computer.

Is there a method to compare to null in Java?

The compare() method in StringUtils class is a null-safe version of the compareTo() method of String class and handles null values by considering a null value less than a non-null value. Two null values are considered equal. Furthermore, this method can be used to sort a list of Strings with null entries:

What exactly is null in Java?

Java null reserved word. In Java, null is a reserved word for literal values. It seems like a keyword, but actually, it is a literal similar to true and false. Points to remember. It is case-sensitive. It is a value of the reference variable. The access to a null reference generates a NullPointerException.


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