import java.util.*;

/** Gates are linked by wires
* @see Wire
* @see MinGate
* @see MaxGate
* @see NotGate
* @see IsTGate
* @see IsFGate
* @see IsUGate
* @see TernaryLogic#findGate(String)
*
* The logic used to simulate a gate is largely lifted from the
* posted solution to Homework 8.
*/
public abstract class Gate {
private final LinkedList <Wire> outgoing = new LinkedList <Wire> ();
/** setter method to add outgoing wires to this gate
* @param w the wire that connects from this gate
*/
public void addOutgoing( Wire w ) {
outgoing.add( w );
}

private int incount = 0; // how many inputs are connected?
/** setter method to add incoming wires to this gate
* @param w the wire that connects to this gate
*/
public void addIncoming( Wire w ) {
// actually, we don't need w, but the public doesn't know that
incount = incount + 1;
}

public final String name; // the name of the gate
private int[] value = new int[2];

// Gripe: We'd like to declare the following as final, but can't
// because they're set by the subclass constructor
public    int inputs; // the type of the gate
public    float delay; // the type of the gate

/** constructor needed by subclasses to set the final fields of gate
*/
protected Gate( String n ) {
name = n;
value[0] = 1;
value[1] = 1;
}

/** factory method scans and processes one gate definition
*/
public static Gate newGate( Scanner sc ) {
String myName = ScanSupport.nextName( sc );
if ("".equals( myName )) {
   Errors.warn(
               "gate has no name"
            );
   sc.nextLine();
   return null;
}

if (TernaryLogic.findGate( myName ) != null) {
   Errors.warn(
               "Gate '" + myName +
               "' redefined."
            );
   sc.nextLine();
   return null;
}

String myType = ScanSupport.nextName( sc );
if ("min".equals( myType )) {
   return new MinGate( sc, myName );

} else if ("max".equals( myType )) {
   return new MaxGate( sc, myName );

} else if ("neg".equals( myType )) {
   return new NegGate( sc, myName );

} else if ("isfalse".equals( myType )) {
   return new IsFGate( sc, myName );

} else if ("istrue".equals( myType )) {
   return new IsTGate( sc, myName );

} else if ("isunknown".equals( myType )) {
   return new IsUGate( sc, myName );

} else {
   Errors.warn(
               "Gate '" + myName +
               "' '" + myType +
               "' has an illegal type."
            );
   sc.nextLine();
   return null;
}
}

Write an application that plays â€œguess the numberâ€ as follows:...

Write an application that plays â€œguess the numberâ€ as follows:...