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Given: class Bird { { System.out.print("bl "); } public Bird() { System.out.print("b2 "); } } class Raptor extends Bird { static { System.out.print("r1 "); } public Raptor() { System.out.print("r2 "); } { System.out.print("r3 "); } static { System.out.print("r4 "); } } class Hawk extends Raptor { public static void main(String[] args) { System.out.print("pre "); new Hawk(); System.out.println("hawk "); } } What is the result? pre b1 b2 r3 r2 hawk pre b2 b1 r2 r3 hawk pre b2 b1 r2 r3 hawk r1 r4 r1 r4 pre b1 b2 r3 r2 hawk r1 r4 pre b2 b1 r2 r3 hawk pre r1 r4 b1 b2 r3 r2 hawk pre r1 r4 b2 b1 r2 r3 hawk The order of output cannot be predicted. Compilation fails. answer is : r1 r4 pre bl b2 r3 r2 hawk public class InheritTest { private InheritTest inherit; @Before public void init() { inherit = new InheritTest(); } public void sayInherit(Raptor obj) { System.out.println("obj is raptor"); } public void sayInherit(Bird obj) { System.out.println("obj is Bird"); } @Test public void inherit() { Raptor raptor = new Raptor(); Hawk hawk = new Hawk(); inherit.sayInherit(raptor); inherit.sayInherit(hawk); } } what will print out? answer is : obj is raptor obj is raptor |
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