questions from Marcus Green tutorial

Hi,
I have two questions regarding the examples taken from Marcus Green tutorial.
Re #1:
public class MyIf{
public static void main(String argv[]){
MyIf mi = new MyIf();
}
MyIf(){
boolean b = false;
if(b=false){
System.out.println("The value of b is"+b);
}
}
}
Why does this code compile but produces no output?
I thougth it would print "The value of b is false".
Re# 2
public class MySwitch{
public static void main(String argv[]){
MySwitch ms= new MySwitch();
ms.amethod();
}
public void amethod(){
char k=10;
switch(k){
default:
System.out.println("This is the default output");
break;
case 10:
System.out.println("ten");
break;
case 20:
System.out.println("twenty");
break;
}
}
}
Can someone explain the line: char k = 10;
How come it's legal?
Thanks a lot!

Hi
for your question :
Re #1:
public class MyIf{
public static void main(String argv[]){
MyIf mi = new MyIf();
}
MyIf(){
boolean b = false;
if(b=false){ // line 1
System.out.println("The value of b is"+b);
}
}
}
in line 1 you are assigning false to b, and since if condition runs only if its true.
the result you are desiring will be possible if you replace line 1 with 'if(b==false){'
Hope this helps

For question 2:
A char is an unsigned 16-bit integer, so any assignment of a small enough integer constant is OK.
char c0 = -1; // illegal
char c1 = 10; // OK
char c2 = 32767; // OK
char c3 = 32768; // OK
char c4 = 65535; // OK
char c5 = 65536; // illegal

Thanks to you both! Got it!

Hi Kamila:
One more strange thing I noticed about (b=false) assignment is that the expression itself evaluates to false. And for (b=true) the expression itself evaluates to true. Later will produce the printout in your code even though it is an assignment and NOT comparision...
Thanks
Barkat

An assignment expression always evaluates to the value assigned.

Are these exams being updated for SCJP1.4???