The correct solution to the java.lang.NullPointerException exception has been solved. It is effective in personal testing! ! !
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Error reporting
java.lang.NullPointerException
Solutions
java.lang.NullPointerException is one of the common errors in Java, which usually occurs when using a null object reference.
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Solution
Check for null references: First, identify the line where the exception occurred and check for null references. You need to look at your code to determine which object is a null reference and make the necessary checks before using that object.Confirm object initialization: If you find that a reference is null, you need to find out why it is null. It could be that the object was not properly initialized or was accidentally set to null before use. Make sure the object has been properly initialized before using it.
View exception stack trace: In the error message, an exception stack trace is provided. By viewing the stack trace, you can determine the specific line of code that caused the exception, making it easier to locate and resolve the problem.
Checking using conditional statements: Before using a potentially null object, you can use conditional statements (such as if statements) to check whether the object is null. This can avoid the occurrence of NullPointerException.
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