多項選擇題

1. public class A { 
2. public void method1() { 
3. B b=new B(); 
4. b.method2(); 
5. // more code here 
6. } 
7. } 
1. public class B { 
2. public void method2() { 
3.C c=new C(); 
4. c.method3(); 
5. // more code here 
6. } 
7. } 
1. public class C { 
2. public void method3() { 
3. // more code here 
4. } 
5. } 
Given: 
25. try { 
26. A a=new A(); 
27. a.method1(); 
28. } catch (Exception e) { 
29. System.out.print(”an error occurred”); 
30. } 
Which two are true if a NullPointerException is thrown on line 3 of class C?()

A. The application will crash.
B. The code on line 29 will be executed.
C. The code on line 5 of class A will execute.
D. The code on line 5 of class B will execute.
E. The exception will be propagated back to line 27.

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