当前分类： OCJP(310-065)
问题：多选题Given a class whose instances， when found in a collection of objects， are sorted by using the compare To method， which two statements are true？（）AThe class implements java.lang.Comparable.BThe class implements java.util.Comparator.CThe interface used t...
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问题：单选题Given： 11.String test = "This is a test"； 12.String[] tokens = test.split（"/s"）； 13.System.out.println（tokens.length）； What is the result？（）A 0B 1C 4D Compilation fails....
问题：多选题Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object？（）AWhen using versions of Java technology earlier than 5.0.BWhen sharing a StringBuffer among multiple threads.CWhen using the java.io class StringBufferInput...
问题：单选题Given： What is the result？（）A Compilation fails due to an error in line 23.B Compilation fails due to an error in line 29.C A ClassCastException occurs in line 29.D A ClassCastException occurs in line 31.E The value of all four objects prints in ...
问题：单选题Given that the elements of a PriorityQueue are ordered according to natural ordering，and： What is the result？（）A apple pearB banana pearC apple appleD apple bananaE banana banana...
问题：多选题Given： And MainClass exists in the /apps/com/company/application directory. Assume the CLASSPATH environment variable is set to "." （current directory）. Which two java commands entered at the commandline will run MainClass？（）Ajava MainClass if run fro...
问题：多选题A developer is creating a class Book， that needs to access class Paper. The Paper class is deployed in a JAR named myLib.jar. Which three， taken independently， will allow the developer to use the Paper class while compiling the Bookclass？（）AThe JAR fi...
问题：单选题Given： 1.package test； 2. 3.class Target { 4.public String name = "hello"；5.} What can directly access and change the value of the variable name？（）A any classB only the Target classC any class in the test packageD any class that extends Target...
问题：单选题Given： 12.Date date = new Date（）； 13.df.setLocale（Locale.ITALY）； 14.String s = df.format（date）； The variable df is an object of type DateFormat that has been initialized in line 11. What is the result if this code is run on December 14， 2000？（）A The va...
问题：单选题Given： What is the result？（）A X， followed by an Exception.B No output， and an Exception is thrown.C Compilation fails due to an error on line 14.D Compilation fails due to an error on line 16.E Compilation fails due to an error on line 17....
问题：单选题Given： What is the result？（）A Compilation succeeds.B Compilation fails due to multiple errors.C Compilation fails due to an error only on line 20.D Compilation fails due to an error only on line 21.E Compilation fails due to an error only on line...
问题：单选题Given： What is the result？（）A 23B 234C 235D Compilation fails....
问题：单选题Given： What is the result？（）A r， t， t，B r， e， o，C Compilation fails.D An exception is thrown at runtime....
问题：单选题Given： 11.double input = 314159.26； 12.NumberFormat nf = NumberFormat.getInstance（Locale.ITALIAN）； 13.String b； 14.//insert code here Which code， inserted at line 14， sets the value of b to 314.159，26？（）A b = nf.parse（ input ）；B b = nf.format（ input ）；...
问题：单选题Given： Which statement is true？（）A Compilation fails because the hashCode method is not overridden.B A HashSet could contain multiple Person objects with the same name.C All Person objects will have the same hash code because the hashCode method is...
问题：单选题Given a valid DateFormat object named df，and 16.Date d = new Date（0L）； 17.String ds = "December 15， 2004"； 18.//insert code here What updates d’s value with the date represented by ds？（）A 18. d = df.parse（ds）；B 18. d = df.getDate（ds）；C 18. try {19. d =...
问题：多选题Which two code fragments will execute the method doStuff（） in a separate thread？（）Anew Thread（） {public void run（） { doStuff（）； }}；Bnew Thread（） {public void start（） { doStuff（）； }}；Cnew Thread（） {public void start（） { doStuff（）； }}.run（）；Dnew Thread（）...
问题：多选题Which four statements are true？（）AHas-a relationships should never be encapsulated.BHas-a relationships should be implemented using inheritance.CHas-a relationships can be implemented using instance variables.DIs-a relationships can be implemented usin...
