tokenizer.java

为什么这个网站要弄这么麻烦啊？？真是搞不明白

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
public class Tokenizer
{
	private String theS;
	private int curPos = 0;
	public Tokenizer()
	{
	//	theS = "!!early in the@ even*ing and i%n the AFTERnoon The QuicK brown fox ^*&^*jumpeD over even a^^ LAZY Brown dOg !!!";
try{
		BufferedReader console = new
		BufferedReader(new InputStreamReader(System.in));
		System.out.print("Input your string  : ");
		theS = console.readLine();
		System.out.println("input is: "+theS);
		}
catch(Exception ex) {
	System.out.print("err " + ex);
	System.exit(1); // give up
}
	}

public String nextWord()
{
	int lenS = theS.length();
	String oneWord ="" ;
	int state =1;
	while(true)
	{
		if (curPos>=lenS)
		{
			return ("");
		}
		char cha = Character.toUpperCase(theS.charAt(curPos));
		switch (state)
		{
			case 1:				
			if (((int)cha >=65) && (int)cha <= 90) // it's a letter
			{
				oneWord += cha;	
				curPos +=1;		
				state = 2;
			}
			else 
				curPos +=1;	
			if (curPos==lenS)
			{
				return ("");
			}
			break;
			
			case 2:
			if (((int)cha >=65) && (int)cha <= 90) // it's a letter
			{
				oneWord += cha;
				curPos +=1;	
			}		
			else 
			{				
				
				state = 1;
				curPos +=1;	
				return oneWord;
			}
			if (curPos==lenS)
			{
				return (oneWord);
			}
				break;
		}
	}
	
}
}