split lexems into token in java type decleration

 
 
import java.util.Scanner;
public class lexical

{
 
  public static int i,c;
  public static String exp;
  public static final String id =  "[a-z A-Z]|[0-9]|[a-z A-Z | 0-9]*";;
 
 
  public static void main(String args[])
{
 Scanner s=new Scanner(System.in);
    String[] key={"int","double","String","float"};
    String[] operator={"+","-","*","/","="};
    String[] comma={","};
    String[] terminator={";"};
  
 System.out.print("Enter decleration : ");
 exp=s.nextLine();
 String delims = "[ , ]";
 
      String[] array=exp.split(delims);
     
     
     
      for(i=0;i<array.length;)
      {
     
     
        //for keyword
        for(c=0;c<key.length;c++)
       { if(array[i].contains(key[c]))
      
       { System.out.println(key[c] +" is a keyword");  }
      
       }
      
       //for operator
       for(c=0;c<operator.length;c++)
       {
         if(array[i].contains(operator[c]))        
       { System.out.println(operator[c] +" is an operator"); }
      
       }
      
              //for identifier
       if(array[i].matches(id))
        { System.out.println(array[i]+" is an identifier"); }
       
         //for comma
       for(c=0;c<comma.length;c++)
      { if(array[i].contains(comma[c]))
        { System.out.println(comma[c]+" is a seperator"); }
        }
       
       
         //for terminator
       for(c=0;c<terminator.length;c++)
      { if(array[i].contains(terminator[c]))
        { System.out.println(terminator[c]+" is a terminator"); }
       }
       i++;
       
       
       
}
 
}
}