A Method Without Body???

Question

Hi everyone I Have an example in some book about operative systems from Dr. A. Tanenbaum, the code looks like this:
public class ProductoConsumidor{
   static final int N = 100;
   static productor p = new productor();
   static consumidor c = new consumidor();
   static nuestro_monitor mon = new nuestro_monitor();
   public static void main(String args[]){
      p.start();
      c.start();
   static class productor extends Thread{
      public void run(){
         int elemento;
         while(true){
            elemento = producir_elemento();
            mon.insertar(elemento);
      private int producir_elemento(){...}
   static class consumidor extends Thread{
      public void run(){
         int elemento;
         while(true){
            elemento = mon.eliminar();
            consumir_elemento(elemento);
      private void consumir_elemento(int elemento){...}
   static class nuestro_monitor{
      private int bufer[] = new int[N];
      private int cuenta = 0, inf = 0, sup = 0;
      public synchronized void insertar(int val){
         if(cuenta == N) ir_a_estado_inactivo();
         bufer[sup] = val;
         sup = (sup+1)%N;
         cuenta = cuenta+1;
         if(cuenta == 1) notify();
      public synchronized int eliminar(){
         int val;
         if(cuenta == 0) ir_a_estado_inactivo();
         val=bufer[inf];
         inf = (inf+1)%N;
         cuenta = cuenta-1;
         if(cuenta==N-1) notify();
         return val;
      private void ir_a_estado_inactivo(){
         try{
            wait();
         }catch(InterruptedException exc){
}But I tried to compile the File and the following error appears: illegal start of expression
*private void consumir_elemento(int elemento){...}*
*^*
What does this fragment of code does, why does it have three dots in the body of the method?? private int producir_elemento(){...}It is supposed to simulte a monitor for 2 process Productor and Consumidor, hope anyone can help xD

Answer 1

B-Rabbit wrote:
What does this fragment of code does, why does it have three dots in the body of the method?? private int producir_elemento(){...}
The code is not complete (and that is why it does not compile).
You are supposed to add your own code in the "body" of that method - ie to replace the three dots. It might be as simple as some output:
private void consumir_elemento(int elemento){
    System.out.printf("%s has been removed from the array and processed%n", elemento);
}