Casting in Java

[pound]

What is the way how to casting data type in Java?

[CornedBee]

C-style

Object o = new String("Hello");
String s = (String)o;

[Dillinger4]

Wideing conversions are permitted with primative data types as well as object types as well as narrowing conversions which must be expliciltly specified.

class castExamples{
public static void main(String[] args){
/*
if a integer value falls with in the range of the destination type
then no cast is required.
*/
byte b = 88; // int value in range. No cast required
byte b1 = (byte)128; // int value not in range. cast required
short s = 678; // int value in range. No cast required
char c = 33; // int value in range. No cast required

/*
Impilcit widening conversions
*/
long l = 2000; //Implicit wideing: int to long;
double d = l; //Implicit wideing: double to long

/*
narrowing conversions between char, byte (or short) always require
an explicit cast even if the source value is in range of the
destination type
*/
byte b2 = 33; // no cast required
short s1 = (short) 'a'; // value in range of short but explicit cast required
char c1 = (char) b2; // byte to char but explicit cast required
}
}

[CornedBee]

One typo:
double d = l; //Implicit wideing: double to long
should be
double d = l; //Implicit wideing: long to double

[Dillinger4]

Yeah i saw that. Thanks CornedBee. I was too lazy to change it though. You can do the Object casting example now.

[CornedBee]

I think I'm too lazy.