[valery]

when I use the jdb.exe to debug the following I/O program,
I don't know how to input data.
this is my code

Code:

import java.io.IOException;
class Lowercase
{
public static void main(String[] args) throws IOException
{
int i;
while ((i=System.in.read())!=-1)
{
/*line 9*/ i=Character.toLowerCase((char)i);
System.out.write(i);
}
}
}

I don't know how to do next, because there is no input prompt.
Anyone can guide me?