public class test （     
private static int j = 0； 
private static boolean methodB（int k） （ 
j += k； 
return true； 
） 
public static void methodA（int  i）（ 
boolean b：    
b = i < 10 | methodB （4）； 
b = i < 10 || methodB （8）； 
） 
public static void main （String args[]）（  
methodA （0）； 
system.out.printIn（j）； 
） 
）  
What is the result？（）  

Integer i = new Integer （42）； 
Long 1 = new Long （42）； 
Double d = new Double （42.0）；  
Which two expressions evaluate to True？（）

1.public class test （ 
2.public static void main （String args[]）    { 
3.int  i = 0xFFFFFFF1； 
4.int  j = ~i； 
5.   
6.} 
7.）   
What is the decimal value of j at line 5？（）  

public class X { 
public static void main （String[] args）  { 
byte b = 127； 
byte c = 126； 
byte d = b + c； 
} 
}  
Which statement is true？（）  

public class Mycircle { 
public double radius； 
public double diameter； 
public void setRadius（double radius） 
this.radius = radius； 
this.diameter= radius * 2； 
} 
public double getRadius（）   { 
return radius； 
} 
Which statement is true？（）  

class BaseClass{ 
private float x= 1.0f； 
protected void setVar （float f） {x = f；} 
} 
class SubClass extends BaseClass   { 
private float x = 2.0f； 
//insert code here 
}  
Which two are valid examples of method overriding？（）     
  

1. class A implements Runnable ( 
2. int i; 
3. public void run () ( 
4. try ( 
5. thread.sleep(5000); 
6. i= 10; 
7. ) catch(InterruptedException e) {} 
8. ) 
9. ) 
10.   
11. public class Test { 
12. public static void  main (string args[]) (
13. try ( 
14. A a = new A (); 
15. Thread t = new Thread (a); 
16. t.start(); 
17.   
18. int j= a.i; 
19.   
20. ) catch (Exception e) {} 
21. ) 
22. }  
Which statement al line 17 will ensure that j=10 at line 19？（）