• Everything from the start marker of a comment block (e.g. /*)
is ignored until the first occurrence of the matching end marker (*/).
• The "throw" statement can only throw "Throwable" objects.
A NullPointerException will be thrown if the Exception given to the
"throw" statement results in null.
• In the same statement you can use decimal, octal and/or hexadecimal statements.
• While creating a multidimensional array, dimensions must be
created left to right. So, int [] [] array = new int [] [4]; is not valid.
• Elements of an un-initialized array object get the default value
corresponding to the type of the elements. Whether the array object
reference is a local or member variable, does not matter.
• In a switch statement the type of the case labels must be assignable to
the type of switch expression.
• It is not possible to break out of an "if" statement. If the "if" statement is placed
within a labeled block, a switch statement or a loop construct, the usage of "break"
would be valid.
• The "if" statement does not return any value.
• "continue" cannot be used outside the context of a loop.
• A variable declared in a "try" block is not visible in "catch" or "finally" block.
• If C extends B and B extends A, then it is not possible to call a method of A
( implemented in all the three classes ) from an instance method in class C.
• An object that has been eligible for garbage collection may stop being
eligible for garbage collection and return to normal life. This happens
if the call to the finalize() reestablishes a reference from the active part
of the program to the object.
• If a class has a final blank variable, then it must be initialized when an
instance is created ( in all the constructors or any initializer ) , or else
the code will fail to compile.
• A thread's status (user or daemon) can be changed before the thread
is started. Changing the status of a thread already started throws
IllegalStateException.
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