单选题Given the command line java Pass2 and: public class Pass2{ public void main(String[]args){ int x=6; Pass2 p=new Pass2(); p.doStuff(x); System.out.print("mainx="+x); } void doStuff(intx){ System.out.print("doStuffx="+x++); } } What is the result?()A Com

题目
单选题
Given the command line java Pass2 and: public class Pass2{ public void main(String[]args){ int x=6; Pass2 p=new Pass2(); p.doStuff(x); System.out.print("mainx="+x); } void doStuff(intx){ System.out.print("doStuffx="+x++); } } What is the result?()
A

Compilation fails.

B

An exception is thrown at runtime.

C

doStuffx=6 main x=6

D

doStuffx=6 mainx =7

E

doStuffx=7 mainx =6

F

doStuffx=7 mainx =7


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更多“Given the command line java Pass2 and: public class Pass2{ p”相关问题
  • 第1题:

    public class Yippee2 {  static public void main(String [] yahoo) {  for(int x= 1; xSystem.out.print(yahoo[x] + “ “);  }  }  }  and the command line invocation: java Yippee2 a b c What is the result?() 

    • A、a b
    • B、b c
    • C、a b c
    • D、 Compilation fails.
    • E、 An exception is thrown at runtime.

    正确答案:B

  • 第2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. public class Salmon extends Fish {  4. void consume() { /* do stuff */ }  5. }  Assume both classes are defined in the correct directories for theft packages, and that the Mammal class correctly defines the findSalmon() method. Which two changes allow this code to compile correctly?()

    • A、 add public to the start of line 4 in Salmon.java
    • B、 add public to the start of line 4 in GrizzlyBear.java
    • C、 add import animals.mammals.*; at line 2 in Salmon.java
    • D、 add import animals.fish.*; at line 2 in GrizzlyBear.java
    • E、 add import animals.fish.Salmon.*; at line 2 in GrizzlyBear.java
    • F、 add import animals.mammals.GrizzlyBear.*;at line 2 in Salmon.java

    正确答案:A,D

  • 第3题:

    Given the command line java Pass2 and:  public class Pass2 {  public void main(String [] args) {  int x=6;  Pass2 p = new Pass2();  p.doStuff(x);  System.out.print(” main x = “+ x); }  void doStuff(int x) {  System.out.print(” doStuffx = “+ x++);  }  }  What is the result?() 

    • A、 Compilation fails.
    • B、 An exception is thrown at runtime.
    • C、 doStuffx = 6 main x = 6
    • D、 doStuffx = 6 main x = 7
    • E、 doStuffx = 7 main x = 6
    • F、 doStuffx = 7 main x = 7

    正确答案:B

  • 第4题:

    Given the following code:     1) class Parent {     2) private String name;     3) public Parent(){}     4) }  5) public class Child extends Parent {     6) private String department;  7) public Child() {}  8) public String getValue(){ return name; }     9) public static void main(String arg[]) {     10) Parent p = new Parent();     11) }  12) }  Which line will cause error?()   

    • A、 line 3
    • B、 line 6
    • C、 line 7
    • D、 line 8
    • E、 line 10

    正确答案:D

  • 第5题:

    10. class Line {  11. public class Point { public int x,y; }  12. public Point getPoint() { return new Point(); }  13. }  14. class Triangle {  15. public Triangle() {  16. // insert code here  17. }  18. }  Which code, inserted at line 16, correctly retrieves a local instance of a Point object?() 

    • A、 Point p = Line.getPoint();
    • B、 Line.Point p = Line.getPoint();
    • C、 Point p = (new Line()).getPoint();
    • D、 Line.Point p = (new Line()).getPoint();

    正确答案:D

  • 第6题:

    单选题
    Given the command line java Pass2 and: What is the result? ()
    A

     doStuff x = 6 main x = 6

    B

     Compilation fails.

    C

     doStuff x = 6 main x = 7

    D

     An exception is thrown at runtime.

    E

     doStuff x = 7 main x = 6

    F

     doStuff x = 7 main x = 7


    正确答案: D
    解析: 暂无解析

  • 第7题:

    单选题
    Given the command line java Pass2 and: public class Pass2{ public void main(String[]args){ int x=6; Pass2 p=new Pass2(); p.doStuff(x); System.out.print("mainx="+x); } void doStuff(intx){ System.out.print("doStuffx="+x++); } } What is the result?()
    A

    Compilation fails.

    B

    An exception is thrown at runtime.

    C

    doStuffx=6 main x=6

    D

    doStuffx=6 mainx =7

    E

    doStuffx=7 mainx =6

    F

    doStuffx=7 mainx =7


    正确答案: B
    解析: 暂无解析

  • 第8题:

    填空题
    Given the following code, write a line of code that, when inserted at the indicated location, will make the overriding method in Extension invoke the overridden method in class Base on the current object.   class Base {   public void print( ) {   System.out.println("base");   }   }   class Extention extends Base {   public void print( ) {   System.out.println("extension");   // insert line of implementation here   }   }   public class Q294d {   public static void main(String args[]) {   Extention ext = new Extention( );   ext.print( );   }   }   Fill in a single line of implementation.()

    正确答案: super.print();
    解析: 暂无解析

  • 第9题:

    单选题
    10. class Line {  11. public class Point { public int x,y; }  12. public Point getPoint() { return new Point(); }  13. }  14. class Triangle {  15. public Triangle() {  16. // insert code here  17. }  18. }  Which code, inserted at line 16, correctly retrieves a local instance of a Point object?()
    A

     Point p = Line.getPoint();

    B

     Line.Point p = Line.getPoint();

    C

     Point p = (new Line()).getPoint();

    D

     Line.Point p = (new Line()).getPoint();


    正确答案: A
    解析: 暂无解析

  • 第10题:

    单选题
    Given: Which code, inserted at line 15, creates an instance of the Point class defined in Line?()
    A

    Point p = new Point();

    B

    Line.Point p = new Line.Point();

    C

    The Point class cannot be instatiated at line 15.

    D

    Line l = new Line() ; l.Point p = new l.Point();


    正确答案: D
    解析: 暂无解析

  • 第11题:

    单选题
    Given a correctly compiled class whose source code is:  package com.sun.sjcp;  public class Commander {  public static void main(String[] args) {  // more code here  }  }  Assume that the class file is located in /foo/com/sun/sjcp/, the current directory is /foo/, and that the classpath contains “.“ (current directory). Which command line correctly runs Commander?()
    A

     java Commander

    B

     java com. sim. sjcp.Commander

    C

     java com/sun/sjcp/Commander

    D

     java -cp com.sun.sjcp Commander

    E

     java -cp com/sun/sjcp Commander


    正确答案: C
    解析: 暂无解析

  • 第12题:

    单选题
    public class Test {  public static void main (String[]args) {  String foo = args[1];  String bar = args[2];  String baz = args[3];  System.out.printIn(“baz = ” + baz);  }  }  And the output:  Baz = 2  Which command line invocation will produce the output?()
    A

     Java Test 2222

    B

     Java Test 1 2 3 4

    C

     Java Test 4 2 4 2

    D

     Java Test 4 3 2 1


    正确答案: A
    解析: 暂无解析

  • 第13题:

    package com.sun.sjcp; public class Commander{ public static void main(String[]args){ //more code here } } Assume that the class fileis located in /foo/com/sun/sjcp/,the current directory is/foo/,and that the classpath contains“.“(current directory). Which command line correctly runs Commander?()

    • A、java Commander
    • B、java com.sim.sjcp.Commander
    • C、java com/sun/sjcp/Commander
    • D、java-cpcom.sun.sjcp Commander
    • E、java-cpcom/sun/sjcp Commander

    正确答案:B

  • 第14题:

    10. class Line {  11. public static class Point { }  12. }  13.  14. class Triangle {  15. // insert code here  16. }  Which code, inserted at line 15, creates an instance of the Point class defined in Line?() 

    • A、 Point p = new Point();
    • B、 Line.Point p = new Line.Point();
    • C、 The Point class cannot be instatiated at line 15.
    • D、 Line 1 = new Line() ; 1.Point p = new 1.Point();

    正确答案:B

  • 第15题:

    Given a correctly compiled class whose source code is:  package com.sun.sjcp;  public class Commander {  public static void main(String[] args) {  // more code here  }  }  Assume that the class file is located in /foo/com/sun/sjcp/, the current directory is /foo/, and that the classpath contains “.“ (current directory). Which command line correctly runs Commander?() 

    • A、 java Commander
    • B、 java com. sim. sjcp.Commander
    • C、 java com/sun/sjcp/Commander
    • D、 java -cp com.sun.sjcp Commander
    • E、 java -cp com/sun/sjcp Commander

    正确答案:B

  • 第16题:

    package foo;   import java.util.Vector;   private class MyVector extends Vector {  int i = 1;   public MyVector() {   i = 2;  }   }   public class MyNewVector extends MyVector {   public MyNewVector () {   i = 4;   }   public static void main (String args ) {    MyVector v = new MyNewVector();   }   }   The file MyNewVector.java is shown in the exhibit.  What is the result?()

    • A、 Compilation will succeed.
    • B、 Compilation will fail at line 5.
    • C、 Compilation will fail at line 6.
    • D、 Compilation will fail at line 14.
    • E、 Compilation will fail at line 17.

    正确答案:B

  • 第17题:

    Given the following directory structure: bigProject |--source | |--Utils.java | |--classes |-- And the following command line invocation: javac -d classes source/Utils.java Assume the current directory is bigProject,what is the result? ()

    • A、If the compile is successful, Utils.class is added to the source directory.
    • B、The compiler returns an invalid flag error.
    • C、If the compile is successful, Utils.class is added to the classes directory.
    • D、If the compile is successful, Utils.class is added to the bigProject directory.

    正确答案:C

  • 第18题:

    单选题
    public class Test {   public static void main (Stringargs) {   String foo = args[1];   String bar = args;   String baz = args;   System.out.printIn(“baz = ” + baz);  }   }   And the output:  Baz = 2   Which command line invocation will produce the output?()
    A

     Java Test 2222

    B

     Java Test 1 2 3 4

    C

     Java Test 4 2 4 2

    D

     Java Test 4 3 2 1


    正确答案: B
    解析: 暂无解析

  • 第19题:

    单选题
    package foo;   import java.util.Vector;   private class MyVector extends Vector {  int i = 1;   public MyVector() {   i = 2;  }   }   public class MyNewVector extends MyVector {   public MyNewVector () {   i = 4;   }   public static void main (String args ) {    MyVector v = new MyNewVector();   }   }   The file MyNewVector.java is shown in the exhibit.  What is the result?()
    A

     Compilation will succeed.

    B

     Compilation will fail at line 5.

    C

     Compilation will fail at line 6.

    D

     Compilation will fail at line 14.

    E

     Compilation will fail at line 17.


    正确答案: D
    解析: 暂无解析

  • 第20题:

    单选题
    11.public class Counter{ 12.public static void main(String[]args){ 13.int numArgs=/*insert code here*/; 14.} 15.} and the command line:java Counter one fred 42 Which code,inserted at line 13,captures the number of arguments passed into the program?()
    A

    args.count

    B

    args.length

    C

    args.count()

    D

    args.length()

    E

    args.getLength()


    正确答案: D
    解析: 暂无解析

  • 第21题:

    单选题
    Given the following directory structure: bigProject |--source ||--Utils.java| |--classes |-- And the following command line invocation: javac -d classes source/Utils.java Assume the current directory is bigProject,what is the result?()
    A

    If the compile is successful, Utils.class is added to the source directory.

    B

    The compiler returns an invalid flag error.

    C

    If the compile is successful, Utils.class is added to the classes directory.

    D

    If the compile is successful, Utils.class is added to the bigProject directory.


    正确答案: D
    解析: 暂无解析

  • 第22题:

    单选题
    Given the following code:     1) class Parent {     2) private String name;     3) public Parent(){}     4) }  5) public class Child extends Parent {     6) private String department;  7) public Child() {}  8) public String getValue(){ return name; }     9) public static void main(String arg[]) {     10) Parent p = new Parent();     11) }  12) }  Which line will cause error?()
    A

     line 3

    B

     line 6

    C

     line 7

    D

     line 8

    E

     line 10


    正确答案: E
    解析: 第8行的getValue()试图访问父类的私有变量,错误。

  • 第23题:

    单选题
    public class Test {  public static void main(String [] args) {  System.out.println(args.length > 4 &&  args[4].equals(“-d”));  }  }   If the program is invoked using the command line: java Test One Two Three –d   What is the result?()
    A

     true

    B

     false

    C

     Compilation fails.

    D

     An exception is thrown at runtime.


    正确答案: A
    解析: The correct answer to this question is D. The args[4] generates a runtime exception error because there are only 4 strings and the expression args[4] prints the 5th String but like it was said earlier, there are only 4 strings. 

  • 第24题:

    单选题
    Given the command line java Pass2 and:  public class Pass2 {  public void main(String [] args) {  int x=6;  Pass2 p = new Pass2();  p.doStuff(x);  System.out.print(” main x = “+ x); }  void doStuff(int x) {  System.out.print(” doStuffx = “+ x++);  }  }  What is the result?()
    A

     Compilation fails.

    B

     An exception is thrown at runtime.

    C

     doStuffx = 6 main x = 6

    D

     doStuffx = 6 main x = 7

    E

     doStuffx = 7 main x = 6

    F

     doStuffx = 7 main x = 7


    正确答案: F
    解析: 暂无解析