Assignment error

[nirjari patel]

package objectTest;

class InOut{
	 float f=1/3;
	 float f1 = 100.0f ;
	 int i=1/3;
	 double d=999d;
	 int j = 10;
	 byte b = 20;
	 
	 long l = 100L ;
	 short s1 = 10;
	 short s2 = 10 ;	 
	 //l = s1;
	 
	 int s3 = s1;
	 d = s3;
	 //s2 = s1;
	 String s= new String("Between");
        public void amethod(final int iArgs){
       int iam;
              class Bicycle{
                       public void sayHello(){
                        //Here
                        }
                }//End of bicycle class
        }//End of amethod
       public void another(){
       int iOther;
       }
}

1) short can fit in double. When I assign "d = s3" , I am getting error "Syntax error on token ";", , expected" on the line immediately before this assignment (int s3 = s2). If I comment "d = s3", this error is gone. Whats wrong with this assignment ? I am getting same error, if I do "s2 = s1" or "f = s2"

This error does not come, if I am creating new declaration. "float f5 = s2" works fine.

So, once a primitive variable is declared, can it be not be assigned value in the same scope ? Does it have to be assigned a value in a method only ? When I assign s2 = s1 in aMethod, it works fine.

2) Another thing is, long l takes more bytes than float f5. But when I assign "f5 = l", I don't get type cast error. Why is that ? If I do "i = l" , I immediately get type cat error. Why do I not get type cast error for assigning a float variable a value of a long ?

Thanks

[Robert Lippens]

For your second question check out: http://www.java-forums.org/new-java/37007-long-float-conversion.html

Apparently, float can hold larger numbers than long, but there are errors introduced because of the fact that it rounds.

[Henry Wong]

nirjari patel wrote:
1) short can fit in double. When I assign "d = s3" , I am getting error "Syntax error on token ";", , expected" on the line immediately before this assignment (int s3 = s2). If I comment "d = s3", this error is gone. Whats wrong with this assignment ? I am getting same error, if I do "s2 = s1" or "f = s2"

This error does not come, if I am creating new declaration. "float f5 = s2" works fine.

So, once a primitive variable is declared, can it be not be assigned value in the same scope ? Does it have to be assigned a value in a method only ? When I assign s2 = s1 in aMethod, it works fine.

Java code, that is not a declaration, can only be in a constructor, initializer, or method.

Henry

[Khuzema Dharwala]

About question one "f,f1,i,d,j,b,l,s1,s2,s3" all will be treated as instance variables and always remember instance variables have to be either initialized at the point of declaration or assigned *inside* a method.


You cannot have a statement like "d = s3" line outside the scope of a method.