Given:

What is the result?（）

单项选择题Given: What is the result?（）

A.Mr. John Doe
B.in exception is thrown at runtime.
C.Compilation fails because of an error in line 12.
D.Compilation fails because of an error in line 15.
E.Compilation fails because of an error in line 20.

单项选择题Click the Exhibit button.Given: What is the result?（）

A.Line 26 prints "a" to System.out.
B.Line 26 prints "b" to System.out.
C.An exception is thrown at line 26 at runtime.
D.Compilation of class A will fail due to an error in line 6.

单项选择题Given: Which statement is true?（）

A.The code will compile without changes.
B.The code will compile if public Tree() { Plant(); } is added to the Tree class.
C.The code will compile if public Plant() { Tree(); } is added to the Plant class.
D.The code will compile if public Plant() { this("fern"); } is added to the Plant class.
E.The code will compile if public Plant() { Plant("fern"); } is added to the Plant class.

单项选择题Click the Exhibit button. What is the result?（）

A. go in Goban go in Goban
B. go in Sente go in Goban
C. go in Goban go in Sente
D. go in Sente go in Sente
E. Compilation fails because of an error in line 17.

单项选择题Given: When the doSomething method is called, after which line does the Object created in line 5 become available for garbage collection?（）

A.Line 5
B.Line 6
C.Line 7
D.Line 8
E.Line 9
F.Line 10