当前分类： SCJP程序员认证考试
问题：单选题1. public class Exception Test { 2. class TestException extends Exception {} 3. public void runTest（） throws TestException {} 4. public void test（） /* Point X */ { 5. runTest（）； 6. } 7. } At Point X on line 4， which code is necessary to make the...
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问题：单选题Which of the following range of short is correct？（）A -27 -- 27-1B 0 -- 216-1C -215 -- 215-1D -231 -- 231-1...
问题：Which two statements are true regarding the return values of...
问题：多选题Given a file GrizzlyBear.java： 1. package animals.mammals； 2. 3. public class GrizzlyBear extends Bear { 4. void hunt（） { 5. Salmon s = findSalmon（）； 6. s.consume（）； 7. } 8. } and another file， Salmon.java： 1. package animals.fish； 2. 3. pub...
问题：boolean bool = true； if（bool = false） { System.out.println（“...
问题：A class games.cards.Poker is correctly defined in the jar fi...
问题：多选题Which two CANNOT directly cause a thread to stop executing？（）ACalling the yield method.BCalling the wait method on an object.CCalling the notify method on an object.DCalling the notifyAll method on an object.ECalling the start method on another Thread ...
问题：Which two valid declarations of a char？ （）...
问题：10. interface A { void x（）； } 11. class B implements A { pu...
问题：单选题1. public class ForBar { 2. public static void main（String []args） { 3. int i = 0， j = 5； 4. tp： for （；；） { 5. i ++； 6. for（；；） 7. if（i --j） break tp； 8. } 9. system.out.printIn（“i = ” + i + “， j = “+ j）； 10. } 11. } What is the resu...
问题：单选题public class Test { private static int[] x； public static void main（String[] args） { System.out.println（x[0]）； } } What is the result？（）A 0B nullC Compilation fails.D A NullPointerException is thrown at runtime.E An ArrayIndexOutOfBoundsExc...
问题：5. String foo = “base”； 6. foo.substring（0，3）； 7. foo.co...
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：多选题AnInterface is an interface. AnAdapter0 is a non-abstract， non-final class with a zero argument constructor. AnAdapter1 is a non-abstract， non-final class without a zero argument constructor， but with a constructor that takes one int argument. W...
问题：单选题1. abstract class AbstractIt { 2. abstract float getFloat（）； 3. } 4. public class AbstractTest extends AbstractIt { 5. private float f1 = 1.0f； 6. private float getFloat（） { return f1； } 7. } What is the result？（）A Compilation succeeds.B An ex...
问题：多选题public interface Foo{ int k = 4； } Which three are equivalent to line 2？（）AFinal int k = 4；BPublic int k = 4；CStatic int k = 4；DPrivate int k = 4；EAbstract int k = 4；FVolatile int k = 4；...
问题：public class IfTest （ public static void main（string[]args）...
问题：多选题Which statements concerning the event model of the AWT are true？（）AAt most one listener of each type can be registered with a component.BMouse motion listeners can be registered on a List instance.CThere exists a class named ContainerEvent in package j...
问题：public class SyncTest{ public static void main（String args...
问题：单选题public class Threads5 { public static void main （String[] args） { new Thread（new Runnable（） { public void run（） { System.out.print（”bar”）； } }）.start（）； } } What is the result？（）A Compilation fails.B An exception is thrown at runtime.C The c...
