ChromeDriver; import org. ChromeOptions; import org. ExpectedConditions; import org. Improve this question. Srieedher Santhakumar Srieedher Santhakumar 23 1 1 silver badge 7 7 bronze badges. Can you add the full error message?
The code is going inside the method which method? SrieedherSanthakumar You did not set driver for the m1 instance — Alex K. Asew, error is Exception in thread "main" java. Show 1 more comment. Active Oldest Votes. Improve this answer. DCON 5 5 silver badges 18 18 bronze badges. Thank you so much. I want code for log out — Srieedher Santhakumar.
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Most visited in Java. We use cookies to ensure you have the best browsing experience on our website. This issue is not entirely a syntactical error, so it can get tricky to identify the problem at times. In this article, we take a look at what java. NullPointerException is, why does it happen, how you can fix it, and some of the best practices to follow to avoid running into wild null pointers.
This indicates that an attempt has been made to access a reference variable that currently points to null. Null is the default value in Java assigned to the variables which are not initialized by the user after or with a declaration. Consider the following example where you declare a variable like this:. This shows that since the variable str is uninitialized, it currently points to, or holds the value, null.
The issue that a null pointing variable poses is that the variable is only a reference, and it does not point to anything. If you try to carry out some operations on the data stored in a null pointing variable, the system will not know what to do.
This happens because there is no data actually stored in the variable; it points to a void entity. Looking for examples of java. NullPointerException is not a difficult task, as all you need to do is not initialize a variable before trying to access it.
StringBuilder is a class that is used to handle the formation and manipulation of strings. If you run the above snippet, it will work just fine. Get matched to a bootcamp today. The average bootcamp grad spent less than six months in career transition, from starting a bootcamp to finding their first job. As you can see, we did not initialize an instance of the StringBuilder class while declaring it.
When the sb. This is where a NullPointerException gets thrown. Due to the exception being thrown, the JVM cannot execute any statements after this. Creating a Null Pointer Exception is easy, but avoiding or fixing it is tricky. While some integrated development environments IDEs warn you if you are accessing a variable before initializing it with some compatible value, most IDEs can not figure this out in complex situations, such as when passing a variable through multiple method calls.
The exact fix for a Null Pointer Exception depends upon your situation and code. Here are some of the top ways to fix common Null Pointer scenarios:.
The biggest reason why Null Pointer Exceptions occur is human error. Make sure the program you have written carries the correct logic that you had initially intended. Also, run your eyes through the source code to check if you have missed out any statements, or misspelled any variables which may have led to some variable not being assigned a value.
Ensure that you have written your code the way your logic directs you to, and you have not missed out on writing any statements, or have not assigned objects to wrong references.
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