Casting is a data type conversion technique. You many use these castings often. As we mentioned earlier, every keyboard input receives as String. Imagine, you’re making calculator software. To do mathematical functions with numbers you want data types like integer, long, float, byte or short but not Strings. Then you need to do the conversion Strings into integer, long etc…
If you need to convert value in a larger capacity data type in to a smaller capacity data type, then you need a casting.
Ex: (long variables capacity: 8 bits, and integer variables capacity 4 bits. Casing the value in long into integer)
Int myInteger = (int)myLong;
Casing can be used to conversions of two different data types with similar capacity.
Ex: (integers are 4 bits and floats are 4 bits too. Casing the value in integer into float)
Float myfloat = (float)myInteger;
Sample Program:
Case: We will define 3 variables and we will cast them.
public class Casting
{
public static void main(String[] args)
{
int myInteger = 64; //integers are 4bytes
float myFloat = 0; //floats are 4bytes
byte myByte = 0; // bytes are 1 byte
System.out.println("Casting similar capacity variables...");
myFloat = (float)myInteger;
System.out.println(myFloat);
System.out.println("Casing larger variable value into samller...");
myByte = (byte)myInteger;
System.out.println(myByte);
}
}
This is the output:
If you need to convert value in a larger capacity data type in to a smaller capacity data type, then you need a casting.
Ex: (long variables capacity: 8 bits, and integer variables capacity 4 bits. Casing the value in long into integer)
Int myInteger = (int)myLong;
Casing can be used to conversions of two different data types with similar capacity.
Ex: (integers are 4 bits and floats are 4 bits too. Casing the value in integer into float)
Float myfloat = (float)myInteger;
Sample Program:
Case: We will define 3 variables and we will cast them.
public class Casting
{
public static void main(String[] args)
{
int myInteger = 64; //integers are 4bytes
float myFloat = 0; //floats are 4bytes
byte myByte = 0; // bytes are 1 byte
System.out.println("Casting similar capacity variables...");
myFloat = (float)myInteger;
System.out.println(myFloat);
System.out.println("Casing larger variable value into samller...");
myByte = (byte)myInteger;
System.out.println(myByte);
}
}
This is the output:
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