analyse.java

使用JAVA写的CMM语言的解释器(词法分析部分)

/*
 * Analyse.java
 *
 * Created on 2007年10月10日, 上午10:02
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package cmm;
import java.util.LinkedList;
import java.util.TreeMap;

/**
 *
 * @author lx
 */
public class Analyse {
    private LinkedList tokens;
    private LinkedList ID;
    private TreeMap tm = new TreeMap();
    private String currentS;
    private boolean finish = false;
    private Cmm cmm;
   
    
    /** Creates a new instance of Analyse */
    public Analyse() {
        tm.clear ();
    }
    public Analyse(LinkedList a,LinkedList b,Cmm c) {       
        this();        
        cmm=c;
        finish = true;
        tokens = a;
        ID = b;
    }
    public String nextToken(){
        if(!tokens.isEmpty ())
            return (String)tokens.removeFirst ();
        finish  = true;
        return null;
    }
    public void an(){
     currentS = nextToken();
     
        
        
    }
    
}