array to single char

[rfviki]

Hi I have an array for example v[0]=1 v[1]=2 v[2]=3
How can I join it into a single number in a array indice to be like x[0]=123

Tanks for any help
:)

[KevinWorkman]

Tanks for any help

You are going to give us a tank if we help you? Awesome.

But what have you tried? What do you think you should do? What worked, what didn't work? How didn't it work? Be specific.

[rfviki]

Hello,
I am reading a text file that contains numbers for example 2 5 8 20 21
each number is separated by a space
that number should be stored in a array.
Reading a file with v[i]= file.read() except for the space
everthing works fine for numbers that have a single digit like 2 or 5 or 8
new array after file.read() will be v[0]=2 v[1]=5 and v[3]=8
The problem is that i need that 20 that is the next number be stored in v[4]
Now file.read() gets a 2 and next gets a 0 that must be joined to be a 20 in arrar v[4]

In the end I need that the text file that contains 2 5 8 20 21 would be stored in the v[0]=2 v[1]=5 v[3]=8 v[4]=20 v[21]=21 to be writted in a binary file using FileOutputStream

[KevinWorkman]

I'm not sure what file.read() is, but it's almost definitely not what you want to be using.

Give this a careful read-through: Lesson: Basic I/O (The Java™ Tutorials > Essential Classes)

[rfviki]

My problem is not the fileI/O that part is working fine
The only question is how can I pass two elements that are in array index i and i+1 to a single one

like this
v[0]=2 and v[1]=1

2 and 1 must be joined to be 21

The final objective is

x[0]=21

[KevinWorkman]

Wrong. Your problem is that you're reading in one character at a time, when you want to read in one word at a time.

If you don't feel like reading the tutorials, that's fine, but don't expect us to work around your refusal to address the actual problem.

If you insist that your "problem" is in copying the array indices to a single array index, create an SSCCE that demonstrates exactly what you're trying to do, without any of the extra file IO stuff. Take a guess at it, at least.