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？（） 

1. interface DoStuff2 {  2. float getRange（int low， int...

单项选择题

1. interface DoStuff2 { 
2. float getRange（int low， int high）； } 
3. 
4. interface DoMore { 
5. float getAvg（int a， int b， int c）； } 
6. 
7. abstract class DoAbstract implements DoStuff2， DoMore { } 
8. 
9. class DoStuff implements DoStuff2 { 
10. public float getRange（int x， int y） { return 3.14f； } } 
11. 
12. interface DoAll extends DoMore { 
13. float getAvg（int a， int b， int c， int d）； } 
What is the result？（） 

interface DeclareStuff{  public static final int EASY =...

单项选择题

interface DeclareStuff{ 
public static final int EASY = 3； 
void doStuff（int t）； } 
public class TestDeclare implements DeclareStuff { 
public static void main（String [] args） { 
int x=5； 
new TestDeclare（）.doStuff（++x）； 
} 
void doStuff（int s） { 
s += EASY + ++s； 
System.out.println（”s “ + s）； 
} 
} 
What is the result？（） 

Given a class Repetition：  1. package utils；  2.  3. pu...

单项选择题

Given a class Repetition： 
1. package utils； 
2. 
3. public class Repetition { 
4. public static String twice（String s） { return s + s； } 
5. } 
and given another class Demo： 
1. // insert code here
2. 
3. public class Demo { 
4. public static void main（String[] args） { 
5. System.out.println（twice（”pizza”））； 
6. } 
7. } 
Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”？（）