FileWordRead.java

package spellcheck;

import java.io.BufferedInputStream;
import java.io.IOException;

/** This class is for reading words form input file.
    - First open input file for reading: in  = new BufferedInputStream(new FileInputStream(String fileName));
    - Next create an object of class FileWord Read: FileWordRead readWords = new FileWordRead(in);
    - To read a word, first check that there is a next word in file: if ( readWords.hasNextWord() )
    - Finally, to read a word, use:  String nextWord = readWords.nextWord();
 */ 
public class FileWordRead{
	private BufferedInputStream in;
	private String nextWord;
	private boolean endOfFile;

	public FileWordRead(BufferedInputStream inFile) throws IOException
	{
		in        = inFile;
		endOfFile = false;
		nextWord  = readWord(); 
	}

	private String readWord()throws IOException{
		int ch;
		char nextChar;
		StringBuffer buf = new StringBuffer();

		ch = in.read();
		if ( ch == -1 ){            
			endOfFile = true;
			return(null);
		}

		nextChar = Character.toLowerCase((char) ch);
		while ( ! (nextChar >= 'a' && nextChar <= 'z' )){
			ch = in.read();
			if ( ch == -1 ){            
				endOfFile = true;
				return(null);
			}
			nextChar = Character.toLowerCase((char) ch);
		}

		while ( nextChar >= 'a' && nextChar <= 'z' ){
			buf.append(nextChar);  
			ch = in.read();
			if ( ch == -1 ){            
				endOfFile = true;
				return(buf.toString());
			}

			nextChar = Character.toLowerCase((char) ch);
		}
		return (buf.toString());
	}

	public boolean hasNextWord() {
		if ( nextWord != null ) return(true);
		else return(false);
	}

	public String nextWord() throws java.io.IOException{
		String toReturn = nextWord;
		if ( !endOfFile ) nextWord = readWord();
		else nextWord = null;
		return(toReturn);
	}
	
}