Type Casting refers to changing an entity of one
datatype into another. This is important for the type conversion in developing any application. If you will store a
int value into a byte variable directly, this will be illegal operation. For storing your calculated
int value in a
byte variable you will have to change the type of resultant data which has to be stored. This type of operation has illustrated below :
In this example we will see that how to convert the data type by using type casting. In the given line of the code
c = (char)(t?1:0); illustrates that if t which is
boolean type variable is true then value of c which is the char type variable will be 1 but 1 is a numeric value. So, 1 is changed into character according to the Unicode value. But in this line c = (char)(t?'1':'0'); 1 is already given as a character which will be stored as it is in the
char type variable c.
Code of the program :
public class conversion{
public static void main(String[] args){
boolean t = true;
byte b = 2;
short s = 100;
char c = 'C';
int i = 200;
long l = 24000;
float f = 3.14f;
double d = 0.000000000000053;
String g = "string";
System.out.println("Value of all the variables like");
System.out.println("t = " + t );
System.out.println("b = " + b );
System.out.println("s = " + s );
System.out.println("c = " + c );
System.out.println("i = " + i );
System.out.println("l = " + l );
System.out.println("f = " + f );
System.out.println("d = " + d );
System.out.println("g = " + g );
System.out.println();
//Convert from boolean to byte.
b = (byte)(t?1:0);
System.out.println("Value of b after conversion : " + b);
//Convert from boolean to short.
s = (short)(t?1:0);
System.out.println("Value of s after conversion : " + s);
//Convert from boolean to int.
i = (int)(t?1:0);
System.out.println("Value of i after conversion : " + i);
//Convert from boolean to char.
c = (char)(t?'1':'0');
System.out.println("Value of c after conversion : " + c);
c = (char)(t?1:0);
System.out.println("Value of c after conversion in unicode : " + c);
//Convert from boolean to long.
l = (long)(t?1:0);
System.out.println("Value of l after conversion : " + l);
//Convert from boolean to float.
f = (float)(t?1:0);
System.out.println("Value of f after conversion : " + f);
//Convert from boolean to double.
d = (double)(t?1:0);
System.out.println("Value of d after conversion : " + d);
//Convert from boolean to String.
g = String.valueOf(t);
System.out.println("Value of g after conversion : " + g);
g = (String)(t?"1":"0");
System.out.println("Value of g after conversion : " + g);
int sum = (int)(b + i + l + d + f);
System.out.println("Value of sum after conversion : " + sum);
}
}
output:
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