SCJP: More Rules #Java Short Notes #SCJP

java -classpath gFolder/Game.jar civilization.java: In such command, -classpath will override (replace) CLASSPATH environment variable.
java -classpath gFolder/Game.jar civilization.java: if both gFolder and current directory contain Game.jar then the jar file under gFolder will be used.
If you want java compiler to recognize your jar file, either you have to mention the location of the jar file in javac command using -classpath switch or you have to add the jar file in the CLASSPATH environment variable. Mentionable - you need to add the file, adding upto the directory will not work.
Garbage collection: can Java program run out of memory? yes.
Can objects be garbage collected even if it has a valid reference? yes. when no live thread has access to the object.
Can Objects created within inner classes be eligible for garbage collection.? yes.
Do garbage collector deletes objects from the stack? No. As objects reside in heaps not in the stack.
If an object's finalize method runs to completion will it always be garbage collected? No. The finalize method may create some other references.
Arrays.equals(Object[] a1, Object[] a2) : Returns true if the two specified arrays of Objects are equal to one another
The results of Binary search on an unsorted array are undefined
Alpha go(int i) is a valid method declaration with a generic return type. class Alpha{}

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Post Data:2010-06-26 02:46:16

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