Type casting in java

Question

Hello!
Could somebody please explain type casting in java? I want to create a program, where the input is a string that contains digits and do a calculation with these ints. So i need to cast from char to int.

Thanks a lot!

Answer 1

Type casting happens when you assign a value of one type to another variable of a different type.
For example :
int i = 10;
long y = i;
float x = y;

but there is also explicit type casting, it happens when you are assigning a large variable to a smaller one.
For example :
double y = 10.04;
long x = (long)y;
int i = (int)x;

To get/declare an int variable from a char variable , you need to use this line :
int x = Character.getNumericValue(c);
//c being a char that contains a number of course!

I recommend making a function/statement that checks if 'c' is a character, because the conversation will work even if the char is not a number, which means that it won't produce an error, but instead, some other random number may appear.

Answer 2

If you're trying to convert a string to an integer, try this for exemple :

String s = "1234567" ;
int n = Integer.parseInt(s);
System.out.println(n);

n contains the integer 1234567

good luck 😊 !

Answer 3

Thank you, i used the "explicit type casting" and it worked out well.