package Synchronization; public interface MessagePassing { public abstract void send(Object m) throws NotImplementedMethodException; public abstract void send(int m) throws NotImplementedMethodException ; public abstract void send(double m) throws NotImplementedMethodException; public abstract Object receive() throws NotImplementedMethodException; public abstract int receiveInt() throws ClassCastException, NotImplementedMethodException; public abstract double receiveDouble() throws ClassCastException, NotImplementedMethodException; public abstract void close() throws NotImplementedMethodException; }