If an object has a finalizer, the method is invoked before the system garbage collects the object, but using finalize() does not guarantee that it would be called b4 garbage collector is invoked. 6. What does the "final" keyword mean in front of a variable? A method? A class? A final...
67)What does it mean that Java Strings are immutable? Strings in Java are immutable to provide security to all variables used in the program, thread-safe (they can be shared among threads without having a native code) and optimum formemory (using logical string pooling). 68) Is it possible...
publicvoidwhenFinalVariableAssign_thenOnlyOnce(){finalinti=1;//...i=2; }Copy The compiler says: The final local variable i may already have been assignedCopy 4.2.FinalReference Variables If we have afinalreference variable, we can’t reassign it either. Butthis doesn’t mean that the object...
40. What does the "final" keyword mean in front of a variable? A method? A class? A final variable cannot be reassigned, but it is not constant. For instance, final StringBuffer x = new StringBuffer(); x.append("hello"); is valid. X cannot have a new value in it, but nothing ...
However, that doesn't mean reflection is useless. On the contrary, it is because of reflection that you can use various frameworks so easily. Frameworks like Spring/Spring Boot, MyBatis, etc. use a lot of reflection mechanisms. Dynamic proxies are also heavily used in these frameworks, and ...
The enq operation does not * assign next field of a predecessor until after attachment, * so seeing a null next field does not necessarily mean that * node is at end of queue. However, if a next field appears * to be null, we can scan prev's from the tail to * double-check. ...
The byte[] digest(byte[] input) method does a final update(input) with the input byte array before calling digest(), which returns the digest byte array. The int digest(byte[] buf, int offset, int len) method stores the computed digest in the provided buffer buf, starting at offset. ...
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In the following, I will discuss what final and effectively final mean, the differences between closures and lambdas, and finally, how we can create closures in Java using lambda expressions. I am not advocating the creation of lambda expression-based closures in Java, nor the abandonment of th...