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问题：Which method is an appropriate way to determine the cosine o...
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问题：单选题//point X public class foo （ public static void main （Stringargs） throws Exception { printWriter out = new PrintWriter （new ） java.io.outputStreamWriter （System.out）， true； out.printIn（“Hello”）； } ） Which statement at PointX on line 1 ...
问题：Given the following code： if （x>0） { System.out.println...
问题：单选题Which statement about static inner classes is true？（）A An anonymous class can be declared as static.B A static inner class cannot be a static member of the outer class.C A static inner class does not require an instance of the enclosing class.D Ins...
问题：单选题What will be the result of attempting to run the following program？（） public class Qaa75 { public static void main（String args[]） { String[][][] arr = { { {}， null }， { { "1"， "2" }， { "1"， null， "3" } }， {}， { { "1"， null } } }； Syste...
问题：多选题public class Key { private long id1； private long 1d2； // class Key methods } A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works corre...
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In which two cases does the compiler supply a default constructor for class A？（）Aclass A{}Bclass A { public A（）{} }Cclass A { public A（int x）{} }Dclass Z {} class A extends Z { void A（）{} }...
问题：Which of the following statements are legal？（） ...
问题：单选题public class Test { public static void main（String[] args） { int x = 0； assert （x 0） ？ “assertion failed” ： “assertion passed”； System.out.println（“Finished”）； } } What is the result？（）A finishedB Compilation fails.C An AssertionError is thr...
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：单选题Which statement is true for the class java.util.HashSet？（）A The elements in the collection are ordered.B The collection is guaranteed to be immutable.C The elements in the collection are guaranteed to be unique.D The elements in the collection are ...
问题：11. public enum Title { 12. MR（”Mr.”）， MRS（”Mrs.”）， MS（”Ms....
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：单选题public class Test { public static void replaceJ（string text） { text.replace （‘j‘， ‘l‘）； } public static void main（String args） { string text = new String （“java”） replaceJ（text）； system.out.printIn（text）； } } What is the result？（）A ...
问题：多选题Which two statements are reserved words in Java？（）ARunBImportCDefaultDImplement...
问题：Which statement is true for the class java.util.ArrayList？（）...
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 valid declarations of a char？（）AChar ch = “a”；BChar ch = ‘/’ ‘；CChar ch = ‘cafe’；DChar ch = “cafe”；EChar ch = ‘/ucafe’；FChar ch = ‘/u10100’；GChar ch = （char） true；...
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...
