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URGENTLY NEED ANSWER II. Essential Concepts on Object Oriented Programming (15%) 1) Detail the specific properties of static variables and methods in Java programming. (9%)
URGENTLY NEED ANSWER
II. Essential Concepts on Object Oriented Programming (15\%) 1) Detail the specific properties of static variables and methods in Java programming. (9%) 2) Carefully examine the following Java program segment, and then clearly state whether all its declarations and implementations are legal (i.e. leading to successful compilation and execution) or not. (3%) \begin{tabular}{l} \hline interface p{} \\ interface i extends p{} \\ interface j extends p{} \\ class t implements i,j{} \\ protected void change (p Pref ){ \\ Object obj = Pref ; \\ /1 \\ \} \end{tabular} 3) Based on the above Java program fragment in 2), draw a clear inheritance hierarchy diagram for all the interfaces and class involved. You should use different notations to distinguish the "interfaces" and "class" in your diagram. (4\%)
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