多项选择题
A. public class X { } public class Y extends X { }
B. public interface Shape { } public interface Rectangle extends Shape{ }
C. public interface Color { } public class Shape { private Color color; }
D. public interface Species { } public class Animal { private Species species; }
E. public class Person { } public class Employee { public Employee(Person person) { }
F. interface Component { } class Container implements Component { private Component[] children; }
单项选择题 try { if ((new Object))(.equals((new Object()))) { System.out.println(“equal”); }else{ System.out.println(“not equal”); } }catch (Exception e) { System.out.println(“exception”); } What is the result? ()
单项选择题 public class Test { public static void main(String [] args) { System.out.println(args.length > 4 &&  args[4].equals(“-d”)); } } If the program is invoked using the command line: java Test One Two Three –d What is the result?()
多项选择题 Giventhatbandcrefertoinstancesofwrapperclasses,whichtwostatementsaretrue?()