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单选题
Given: What is the result?（）
A
Compilation fails.
B
exception is thrown at runtime.
C
The attribute id in the ItemTest object remains unchanged.
D
The attribute id in the ItemTest object is modified to the new value.
E
A new ItemTest object is created with the preferred value in the id attribute.
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更多 “单选题Given: What is the result?（）A Compilation fails.B exception is thrown at runtime.C The attribute id in the ItemTest object remains unchanged.D The attribute id in the ItemTest object is modified to the new value.E A new ItemTest object is created with the preferred value in the id attribute.” 相关考题
考题
Given:What is the result?()
A.Compilation fails.B.exception is thrown at runtime.C.The attribute id in the ItemTest object remains unchanged.D.The attribute id in the ItemTest object is modified to the new value.E.A new ItemTest object is created with the preferred value in the id attribute.
考题
public class Threads3 implements Runnable { public void run（） { System.out.print（”running”）； } public static void main（String[] args） { Thread t = new Thread（new Threads3（））； t.run（）； t.run（）； t.start（）； } } What is the result？（） A、 Compilation fails.B、 An exception is thrown at runtime.C、 The code executes and prints “running”.D、 The code executes and prints “runningrunning”.E、 The code executes and prints “runningrunningrunning”.
考题
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 code executes normally and prints “bar”.D、 The code executes normally， but nothing prints.
考题
public class ItemTest { private final mt id； public ItemTest（int id） { this.id = id； } public void updateId（int newId） { id = newId； } public static void main（String[] args） { ItemTest fa = new ItemTest（42）； fa.updateId（69）； System.out.println（fa.id）； } } What is the result？（） A、 Compilation fails.B、 An exception is thrown at runtime.C、 The attribute id in the Item object remains unchanged.D、 The attribute id in the Item object is modified to the new value.E、 A new Item object is created with the preferred value in the id attribute.
考题
11. public static void main（String[] args） { 12. Object obj = new Object（） { 13. public int hashCode（） { 14. returns 42； 15. } 16. }； 17. System.out.println（obj.hashCode（））； 18. } What is the result？ （） A、 42B、 An exception is thrown at runtime.C、 Compilation fails because of an error on line 12.D、 Compilation fails because of an error on line 16.E、 Compilation fails because of an error on line 17.
考题
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 to the wait pool.
考题
public class Test { public static void main（String args[]） { class Foo { public int i = 3； } Object o = （Object）new Foo（）； Foo foo = （Foo）o； System.out.println（“i = “ + foo.i）； } } What is the result？（） A、 i = 3B、 Compilation fails.C、 A ClassCastException is thrown at line 6.D、 A ClassCastException is thrown at line 7.
考题
public class Drink implements Comparable { public String name； public int compareTo（Object o） { return 0； } } and： Drink one = new Drink（）； Drink two = new Drink（）； one.name= “Coffee”； two.name= “Tea”； TreeSet set = new TreeSet（）； set.add（one）； set.add（two）； A programmer iterates over the TreeSet and prints the name of each Drink object. What is the result？（） A、 TeaB、 CoffeeC、 Coffee TeaD、 Compilation fails.E、 The code runs with no output.F、 An exception is thrown at runtime.
考题
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？ （） A、 equalB、 not equalC、 exceptionD、 Compilation fails.
考题
import java.io.*； public class Forest implements Serializable { private Tree tree = new Tree（）； public static void main（String [] args） { Forest f= new Forest（）； try { FileOutputStream fs = new FileOutputStream（”Forest.ser”）； ObjectOutputStream os = new ObjectOutputStream（fs）； os.writeObject（f）； os.close（）； } catch （Exception ex） { ex.printStackTrace（）； } } } class Tree { } What is the result？（） A、 Compilation fails.B、 An exception is thrown at runtime.C、 An instance of Forest is serialized.D、 A instance of Forest and an instance of Tree are both serialized.
考题
public class Threads4 { public static void main （String[] args） { new Threads4（）.go（）； } public void go（） { Runnable r = new Runnable（） { public void run（） { System.out.print（”foo”）； } }； Thread t = new Thread（r）； t.start（）； t.start（）； } } What is the result？（） A、 Compilation fails.B、 An exception is thrown at runtime.C、 The code executes normally and prints „foo”.D、 The code executes normally， but nothing is printed.
考题
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 value of s is 14-dic-2000.B、The value of s is Dec 14， 2000.C、An exception is thrown at runtime.D、Compilation fails because of an error in line 13.
考题
Given： String[] elements = { "for"， "tea"， "too" }； String first = （elements.length 0） ？ elements[0] ： null； What is the result？（）A、Compilation fails.B、An exception is thrown at runtime.C、The variable first is set to null.D、The variable first is set to elements[0].
考题
单选题Given： What is the result？（）A
Compilation fails.B
An exception is thrown at runtime.C
The code executes normally and prints "sleep".D
The code executes normally， but nothing is printed.
考题
单选题Click the Exhibit button. Given: ClassA a = new ClassA（ ）; a.methodA（ ）; What is the result? （）A
Compilation fails.B
ClassC is displayed.C
The code runs with no output.D
An exception is thrown at runtime.
考题
单选题public class Drink implements Comparable { public String name； public int compareTo（Object o） { return 0； } } and： Drink one = new Drink（）； Drink two = new Drink（）； one.name= “Coffee”； two.name= “Tea”； TreeSet set = new TreeSet（）； set.add（one）； set.add（two）； A programmer iterates over the TreeSet and prints the name of each Drink object. What is the result？（）A
TeaB
CoffeeC
Coffee TeaD
Compilation fails.E
The code runs with no output.F
An exception is thrown at runtime.
考题
单选题Given: What is the result？（）A
Compilation fails.B
An exception is thrown at runtime.C
The code executes and prints "running".D
The code executes and prints "runningrunning".E
The code executes and prints "runningrunningrunning".
考题
单选题11. public static void main（String[] args） { 12. Object obj = new Object（） { 13. public int hashCode（） { 14. returns 42； 15. } 16. }； 17. System.out.println（obj.hashCode（））； 18. } What is the result？ （）A
42B
An exception is thrown at runtime.C
Compilation fails because of an error on line 12.D
Compilation fails because of an error on line 16.E
Compilation fails because of an error on line 17.
考题
单选题Given： What is the result？ （）A
A new Item object is created with the preferred value in the id attribute.B
The attribute id in the Item object is modified to the new value.C
Compilation fails.D
An exception is thrown at runtime.E
The attribute id in the Item object remains unchanged.
考题
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 code executes normally and prints “bar”.D
The code executes normally， but nothing prints.
考题
单选题public class ItemTest { private final mt id； public ItemTest（int id） { this.id = id； } public void updateId（int newId） { id = newId； } public static void main（String[] args） { ItemTest fa = new ItemTest（42）； fa.updateId（69）； System.out.println（fa.id）； } } What is the result？（）A
Compilation fails.B
An exception is thrown at runtime.C
The attribute id in the Item object remains unchanged.D
The attribute id in the Item object is modified to the new value.E
A new Item object is created with the preferred value in the id attribute.
考题
单选题Given： What is the result？（）A
Compilation fails.B
An exception is thrown at runtime.C
doStuff x = 6 main x = 6D
doStuff x = 6 main x = 7E
doStuff x = 7 main x = 6
考题
单选题public class Test { public static void main（String args[]） { class Foo { public int i = 3； } Object o = （Object）new Foo（）； Foo foo = （Foo）o； System.out.println（“i = “ + foo.i）； } } What is the result？（）A
i = 3B
Compilation fails.C
A ClassCastException is thrown at line 6.D
A ClassCastException is thrown at line 7.
考题
单选题import java.io.*； public class Forest implements Serializable { private Tree tree = new Tree（）； public static void main（String [] args） { Forest f= new Forest（）； try { FileOutputStream fs = new FileOutputStream（”Forest.ser”）； ObjectOutputStream os = new ObjectOutputStream（fs）； os.writeObject（f）； os.close（）； } catch （Exception ex） { ex.printStackTrace（）； } } } class Tree { } What is the result？（）A
Compilation fails.B
An exception is thrown at runtime.C
An instance of Forest is serialized.D
A instance of Forest and an instance of Tree are both serialized.
考题
单选题Given： 11. public static void main（String[] args） { 12. Object obj = new int[] { 1， 2， 3 }； 13. int[] someArray = （int[]）obj； 14. for （int i ： someArray） System.out.print（i + " "）； 15. } What is the result？ （）A
Compilation fails because of an error in line 13.B
A ClassCastException is thrown at runtime.C
1 2 3D
Compilation fails because of an error in line 14.E
Compilation fails because of an error in line 12.
考题
单选题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？ （）A
equalB
not equalC
exceptionD
Compilation fails.
考题
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 to the wait pool.
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