BlockNode.java

import java.util.List;
import java.util.LinkedList;

public class BlockNode extends Node
{
    private List<Node> statements;

    public BlockNode(List<Node> statements)
    {    
        this.statements = statements;
    }
   
    public Object eval()
    {
        Object ret = null;
        
        for (Node statement : statements)
        {
            ret = statement.eval();
        }
        return ret;
    }

    public Node get(int index)
    {
        return statements.get(index);
    }

    protected List<Node> getStatements()
    {
        return statements;
    }
    
    public String toString()
    {
        String str = "";
        for (Node statement: statements)
            str = str + statement + "\n";
        
        return str;       
    }
}