public static int pedir_entero(String s)
	{
		int aux = 0;
		boolean correct=false;
		Scanner stdin=new Scanner(System.in);
 
                     try{
		while(correct == false)
		{
 
				System.out.print(s);
				aux=stdin.nextInt();
				stdin.next();
				correct=true;
		    }
 
		}
                 catch(InputMismatchException e)
			{
				System.err.println("Error!");
			}
		return aux;
	}

public static int pedir_entero()
	{
		int aux = 0;
		Scanner stdin=new Scanner(System.in);
		try{
		System.out.println("N: ");
		aux=Integer.parseInt(stdin.next());
		}catch (Exception e) {
			System.err.println(e.getMessage());
			pedir_entero();
		}
		return aux;
	}
 

public static int pedir_entero1()
	{
		int aux = 0;
		Scanner stdin=new Scanner(System.in);
		do{
		try{
		System.out.println("N: ");
		aux=Integer.parseInt(stdin.next());
		break;
		}catch (Exception e) {
			System.err.println(e.getMessage());
			continue;
		}
			}while(true);
		return aux;
	}

import java.io.*;
 
public class Pedirnumero implements Serializable{
 
public static void main(String a[]){
 
BufferedReader rs = new BufferedReader(new InputStreamReader(System.in));
String dato = "";
 
try{
  do{
 
	 System.out.print("Digite numero: "); dato = rs.readLine();
 
 
  }while(pedirnumero(dato));
 
  System.out.println("DATO CORRECTO : "+dato);	
 
 
}catch(Exception e){
 
  System.out.println("Error en "+e.getMessage());
 
  }
}//fin main
 
 
public static boolean pedirnumero(String dato){
 
 try{
 
     Integer.parseInt(dato);
 
     return false;	
 
 }catch(Exception e){
     System.out.println("Dato no permitido: "+dato);     
     return true;
 }	
 
 }	
 
}