Char Display And Whole Together
My code is in Java. I have an array char
that has values int
as well as values char
. When I type, I get its ASCII related values. But when I convert the output to int
, my character value changes to its ASCII value.
char arr[]=new char [5];
for(int i=0;i<5;i++)
{
arr[i]=(char)(i+1);
}
arr[0]='@';
for(int i=0;i<5;i++)
{
System.out.println(arr[i]);
}
Or converting to int
:
for(int i=0;i<5;i++)
{
System.out.println((int)arr[i]);
}
My conclusion
64 2 3 4 5
or
@
depending on what code i am using. However, I want the result to be
@ 2 3 4 5
I tried to use method overloading to separate integers and characters, but it didn't work.
Is there a condition for int
as below?
if(arr[i]==int)
The code doesn't work, but is there something similar to it or any other solution?
source to share
This doesn't work because, as far as Java is concerned, a primitive char
is just a 16-bit unsigned integer. To demonstrate:
System.out.println('A' == 65); // prints true
One way to get around this is to declare an array of objects and rely on auto-boxing to have Java automatically convert your primitive value to the wrapper object, Integer
or Character
:
Object arr[] = new Object[2];
arr[0] = '@'; // stores '@' as a Character wrapper object
arr[1] = 1; // stores 1 as an Integer wrapper object
for (Object o : arr) {
System.out.println(o);
}
Unlike primitives, wrapper objects know about their type, so this prints:
@ // by calling Character.toString()
1 // by calling Integer.toString()
Note that you lose some compile time checking in the process. Your array of objects will not only accept values Character
and Integer
, but any other value as well.
source to share
Robbie is very correct! However, if you're just looking for a hack to quickly convert between ints and chars, you can take advantage of ASCII values and use offset (48) in this case, which is the value for char '0'
, and then use that to convert between primitive types. So I used an array to store the resulting integers for output purposes.
public class Hack{
public static void main(String []args){
char arr[]=new char [5];
int offset = 48;
for(int i=0;i<5;i++)
{
arr[i]=(char)(i+1 + offset);
}
//arr[0]='@';
for(int i=0;i<5;i++)
{
System.out.println(arr[i]);
}
int num_arr[] = new int [5];
for(int i=0;i<5;i++)
{
num_arr[i]= ( arr[i] - offset);
}
System.out.println("\n");
for(int i=0;i<5;i++)
{
System.out.println(num_arr[i]);
}
}
}
Output:
1 2 3 4 5 1 2 3 4 5
source to share