insert * if subsequent number even - if odd
public class InsertStarBetweenEvenAndDashBetweenOdd {
public static void main(String[] args)
{
long l=104875l;
String s= ""+l;
StringBuilder s2= new StringBuilder("");
s2.append(s.charAt(0));
for(int i=1;i<s.length();i++)
{
int t1= Integer.parseInt(s.charAt(i-1)+"");
int t2= Integer.parseInt(s.charAt(i)+"");
s2.append((t1%2==0?(t2%2==0?"*"+s.charAt(i):s.charAt(i)):(t2%2!=0?"-"+s.charAt(i):s.charAt(i)))+"");
}
System.out.println(s2.toString());
}
}