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.
相关考题
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多项选择题
Whichtwocodefragmentscorrectlycreateandinitializeastaticarrayofintelements?()
A.static final int[] a = { 100,200 };
B.static final int[] a; static { a=new int[2]; a[0]=100; a[1]=200; }
C.static final int[] a = new int[2]{ 100,200 };
D.static final int[] a; static void init() { a = new int[3]; a[0]=100; a[1]=200; } -
单项选择题
Click the Exhibit button. 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. -
多项选择题
Given. Which two statements are true?()
A.Foo.beta() is a valid invocation of beta().
B.Foo.alpha() is a valid invocation of alpha().
C.Method beta() can directly call method alpha().
D.Method alpha() can directly call method beta().
