/*************************************************************************
 *  Compilation:  javac And.java 
 *  
 *  AND gate.
 *   
 *************************************************************************/

public class And extends Gate {
    private Gate in1, in2;

    public And(Gate a, Gate b) {
        in1 = a;
        in2 = b;
    }

    public boolean signal() { return in1.signal() && in2.signal(); }
}