stringreader.java

《j2ee开发全程实录》随书源码

package com.cownew.ctk.common.stringSep;

public class StringReader
{
	String _data = null;

	int _ptr = 0;

	public StringReader(String data)
	{
		this._data = data;
	}

	public final char next() throws ParserException
	{
		if (eof())
		{
			throw new ParserException("eof");
		}

		return _data.charAt(_ptr++);
	}

	public final boolean eof() throws ParserException
	{
		return _ptr >= _data.length();
	}

	public final char lookup(int i) throws ParserException
	{
		return _data.charAt(_ptr + i);
	}

	public final boolean eof(int i)
	{
		return (_ptr + i) >= _data.length();
	}
}