dichiara.java

mylanguage（大学作业）

//
//  Dichiara.java
//
//  Created by Dario Malchiodi on Jan 04 2006.
//  Copyright (c) 2006 DSI. All rights reserved.
//

import java.util.*;

public class Dichiara extends Istruzione {

    private String variabile;

    public Dichiara(String v) {
        variabile = new String(v);
    }

    public void esegui() throws ExecutionException {
        if(memoria.get(variabile) != null) throw new ExistingVariableException(variabile);
        memoria.put(variabile,new Integer(0));
    }
    
    public Object clone() {
        return new Dichiara(variabile);
    }
    
    public String toString() {
        return indenta() + "DECLARE "+variabile+";\n";
    }

}