About Question enthuware.ocajp.i.v8.2.1314 :

[vilasa]

One of the answer is Conversion from byte to short doesn't need a cast. I tried testing this.But it gives compiler error sayin incompatible types

byte by1=10;
s=by1;
error: incompatible types: byte cannot be converted to Short
s=by1;
^
1 error

Thanks,
Veena

[admin]

Please post the complete and exact code that you are trying to compile. From the error message, it looks like you are using Short instead of short.

[vilasa]

You are right. It was Short ,not short. Thank you.

[girishankaran]

Conversion from char to long does not need a cast. the answer is true or false?
Its shows true

[admin]

What happened when you tried it out?

[jeroenisanders]

Conversion from int to float does need a cast. The opposite is not true. For instance next will not compile:
float fll = 1;
int int23 = 2;
int23 = fll;

[admin]

Conversion from int to float does need a cast. The opposite is not true. For instance next will not compile:
float fll = 1;
int int23 = 2;
int23 = fll;

No, conversion from int to float DOES NOT need a cast. conversion from float to int needs a cast.
That is why, in your example, the first line compiles fine. The third line does not.

[herngyih]

"Conversion from short to char needs a cast". The reason given is because their ranges are not compatible. Both are 16 bits though.

1.Is it because char is unicode and short is integral?

2.Notice that byte is 8 bits and yet still need casting to fit into char(16 bits).Why?

Code: Select all

  	  byte bytey =1;
	  
	  char chary = 'a';
	  
	  chary =  bytey; //fail
	  
	  chary =  (char)bytey; //OK
	  
	  

[admin]

No, it is because short can have negative values while char cannot. byte, char, short, int , and long are all integral types.