单选题10. public class ClassA { 11. public void methodA() { 12. ClassB classB = new ClassB(); 13. classB.getValue(); 14. } 15. } And: 20. class ClassB { 21. public ClassC classC; 22. 23. public String getValue() { 24. return classC.getValue(); 25. } 26. } And: 30. class ClassC { 31. public String value; 32. 33. public String getValue() { 34. value = “ClassB”; 35. return value; 36. } 37. } Given: ClassA a = new ClassA(); a.methodA(); What is the result?()A Compilation fails.B ClassC is displayed.C The code runs with no output.D An exception is thrown at runtime.
单选题
10. public class ClassA { 11. public void methodA() { 12. ClassB classB = new ClassB(); 13. classB.getValue(); 14. } 15. } And: 20. class ClassB { 21. public ClassC classC; 22. 23. public String getValue() { 24. return classC.getValue(); 25. } 26. } And: 30. class ClassC { 31. public String value; 32. 33. public String getValue() { 34. value = “ClassB”; 35. return value; 36. } 37. } Given: ClassA a = new ClassA(); a.methodA(); What is the result?()
A
Compilation fails.
B
ClassC is displayed.
C
The code runs with no output.
D
An exception is thrown at runtime.
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