当前分类： SCJP程序员认证考试
问题：11. public enum Title { 12. MR（”Mr.”）， MRS（”Mrs.”）， MS（”Ms....
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问题：Which of the following statements are legal？（） ...
问题：单选题11.classA { 12. public void process（） { System.out.print（”A “）； } } 13. class B extends A { 14. public void process（） throws RuntimeException { 15. super.process（）； 16. if （true） throw new RuntimeException（）； 17. System.out.print（“B”）； }} 18. pu...
问题：Given the following code， which statements concerning the ob...
问题：Which method is an appropriate way to determine the cosine o...
问题：单选题public class Foo { public void main（ String[] args ） { System.out.println（ “Hello” + args[0] ）； } } What is the result if this code is executed with the command line？（）A HelloB Hello FooC Hello worldD Compilation fails.E The code does not ru...
问题：多选题class A { } class Alpha { private A myA = new A（）； void dolt（ A a ） { a = null； } void tryIt（） { dolt（ myA ）； } } Which two statements are correct？（）AThere are no instanced of A that will become eligible for garbage collection.BExplicitly se...
问题：Which statement is true for the class java.util.ArrayList？（）...
问题：单选题static void test（） throws Error { if （true） throw new AssertionError（）； System.out.print（”test “）； } public static void main（String[] args） { try { test（）； } catch （Exception ex） { System.out.print（”exception “）； } System.out.print（”elld “）； } ...
问题：单选题How can you create a listener class that receives events when the mouse is moved？（）A By extending MouseListener.B By implementing MouseListener.C By extending MouseMotionListener.D By implementing MouseMotionListener.E Either by extending MouseMot...
问题：多选题Which three form part of correct array declarations？（）Apublic int a []Bstatic int [] aCpublic [] int aDprivate int a [3]Eprivate int [3] a []Fpublic final int [] a...
问题：Use the operators "<<"， ">>"， which statements are true？ （） ...
问题：多选题Which two statements are reserved words in Java？（）ARunBImportCDefaultDImplement...
问题：单选题Which method implementations will write the given string to a file named "file"， using UTF8 encoding？（） IMPLEMENTATION a： public void write（String msg） throws IOException { FileWriter fw = new FileWriter（new File（"file"））； fw.write（msg）； fw.c...
问题：多选题Given that b and c refer to instances of wrapper classes， which two statements are true？（）Ab.equals（b） returns true.Bb.equals（c） returns the same result as b == c.Cb.eqials（c） can return false even if c.equals（b） returns true.Db.equals（c） throws an exc...
问题：A programmer needs to create a logging method that can accep...
问题：单选题What will be written to the standard output when the following program is run？（） public class Q63e3 { public static void main（String args[]） { System.out.println（9 ^ 2）； } }A 81B 7C 11D 0E false...
问题：单选题public class X { public static void main （Stringargs） { string s = new string （“Hello”）； modify（s）； System.out.printIn（s）； } public static void modify （String s） { s += “world!”； } } What is the result？（）A The program runs and print...
问题：多选题Which two are true？（）AAn encapsulated， public class promotes re-use.BClasses that share the same interface are always tightly encapsulated.CAn encapsulated class allows subclasses to overload methods， but does NOT allow overriding methods.DAn encapsula...
问题：单选题What happens when thread X executes a wait（） method on object A， without owning object A’s lock？（）A Compilation fails.B An exception is thrown.C The wait（） method has no effect.D Thread X receives the lock immediately.E Object A moves the thread t...
