What is typecasting in java?

Answer 1

typecasting is; in simple language converting form one type to another type.

for example. we have the following types in INTEGER

1. byte

2. short

3. int

4. long

byte consist of 1 8bits, short consist of 2 8bits, int consist of 4 8bits and long 8 8bits.

now to think of this u can store a small box in a big box; but u cant do the other way round.

to do the other way round u need to cut the big box into small box dimensions. and then place it.

this is wht TYPECASTING will do.

so i can store the numbers in INTEGER type if it falls in the range.

the following is the range of each

1. byte=-128 to 127

2.short= -32768 to 32767

etc..

so the point is if i have

byte a;

short b;

byte c;

c=a+b;

this will give me an error.

as i am trying to store big value in small size.

to do this i will have to typecast it.

i.e c= (byte)a+(byte)b;

the words in the bracket suggest type casted into.

this is typecasting.

to know more abt java i found out this amazing channel on YouTube. its called as SLIDENEARD. Its a channel dedicated to java programming issues.

i hope this helps your purpose.

Answer 2

Typecasting refers to changing an object of one datatype to another.