Educoder -Java面向对象 - Java语言之异常处理类（第2关：异常的捕获与处理 - 文本统计）

package step2;
import java.io.*;

public class CatchException {
    public static void main(String[] args) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str;
        /********** Begin *********/
        //补全try/catch块，异常类型为IOException
        try
        {
        	str = reader.readLine();
        	int letter = 0;
        	int space  = 0;
        	int number = 0;
        	int other  = 0;
        	for (int i = 0 ; i < str.length() ; i ++)
        	{
        		if (Character.isLetter(str.charAt(i)))
        		{
        			letter ++;
        		}
        		else if (Character.isSpaceChar(str.charAt(i)))
        		{
        			space ++;
        		}
        		else if (Character.isDigit(str.charAt(i)))
        		{
        			number ++;
        		}
        		else other ++;
        	}
        	System.out.println("letter="+letter +",space="+ space + ",number=" + number+",other="+other);
        	
        }catch(IOException e)
        {
        	e.printStackTrace();
        }

       
        /********** End *********/
    }
}