token.java

一个查找java程序里bug的程序的源代码,该程序本身也是java写的,对提高java编程水平很有用

/*
 * FindBugs - Find bugs in Java programs
 * Copyright (C) 2003,2004 University of Maryland
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.umd.cs.findbugs;

/**
 * Simple token class.
 *
 * @author David Hovemeyer
 * @see Tokenizer
 */
public class Token {
	/**
	 * End of file.
	 */
	public static final int EOF = -1;

	/**
	 * End of line.
	 */
	public static final int EOL = -2;

	/**
	 * An ordinary word, number, etc.
	 */
	public static final int WORD = 0;

	/**
	 * A string or character literal.
	 */
	public static final int STRING = 1;

	/**
	 * A single character token.
	 */
	public static final int SINGLE = 2;

	/**
	 * A comment.
	 */
	public static final int COMMENT = 3;

	private int kind;
	private String lexeme;

	/**
	 * Constructor.
	 *
	 * @param kind   the kind of token
	 * @param lexeme the text value of the token
	 */
	public Token(int kind, String lexeme) {
		this.kind = kind;
		this.lexeme = lexeme;
	}

	/**
	 * Constructor when there is no text.
	 * E.g., EOF and EOL.
	 *
	 * @param kind the kind of token
	 */
	public Token(int kind) {
		this.kind = kind;
		this.lexeme = "";
	}

	/**
	 * Get the kind of token.
	 */
	public int getKind() {
		return kind;
	}

	/**
	 * Get the text value of the token.
	 */
	public String getLexeme() {
		return lexeme;
	}
}

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