单项选择题
class Super {
public int getLenght() { return 4; }
}
public class Sub extends Super {
public long getLenght() { return 5; }
public static void main(String[] args) {
Super sooper = new Super();
Sub sub = new Sub();
System.out.println(
sooper.getLenght() + “,” + sub.getLenght() );
}
}
What is the output?（）
A. Just after line 13.
B. Just after line 14.
C. Just after line 15.
D. Just after line 16 （that is， as the method returns）.
相关考题
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多项选择题
Whichthreestatementsaretrue？（）
A. The default constructor initializes method variables.
B. The default constructor has the same access as its class.
C. The default constructor invoked the no-arg constructor of the superclass.
D. If a class lacks a no-arg constructor， the compiler always creates a default constructor.
E. The compiler creates a default constructor only when there are no other constructors for the class. -
多项选择题
1.classTestA{ 2.TestBb； 3.TestA（）{ 4.b=newTestB（this）； 5.} 6.} 7.classTestB{ 8.TestAa； 9.TestB（TestAa）{ 10.this.a=a； 11.} 12.} 13.classTestAll{ 14.publicstaticvoidmain（Stringargs[]）{ 15.newTestAll（）.makeThings（）； 16.//...codecontinueson 17.} 18.voidmakeThings（）{ 19.TestAtest=newTestA（）； 20.} 21.} Whichtwostatementsaretrueafterline15，beforemaincompletes？（）
A. Line 15 causes a stack overflow.
B. An exception is thrown at runtime.
C. The object referenced by a is eligible for garbage collection.
D. The object referenced by b is eligible for garbage collection.
E. The object referenced by a is not eligible for garbage collection.
F. The object referenced by b is not eligible for garbage collection. -
单项选择题
public class X { public static void main（String [] args） { try { badMethod（）； System.out.print（“A”）； } catch （Exception ex） { System.out.print（“B”）； } finally { System.out.print（“C”）； } System.out.print（“D”）； } public static void badMethod（） { throw new RuntimeException（）； } } What is the result？ （）
A. AB
B. BC
C. ABC
D. BCD
E. Compilation fails.
