example06_letterdigitother.java

java课程设计教材上的程例题序代码

package example;

import java.io.*;

public class Example06_LetterDigitOther
{
	public static void main(String[] args)
	{
		try
		{
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			String str = br.readLine();
			br.close();
			
			int letter, digit, other;
			letter = digit = other = 0;
			for (int i = 0; i < str.length(); i++)
			{
				char ch = str.charAt(i);
				if (Character.isLetter(ch)) letter++;
				else if (Character.isDigit(ch)) digit++;
				else other++;
			}
			
			BufferedWriter bw = new BufferedWriter(new FileWriter("chars.txt"));
			bw.write(str);
			bw.newLine();
			bw.write("Letter = " + letter);
			bw.newLine();
			bw.write("Digit = " + digit);
			bw.newLine();
			bw.write("Other = " + other);
			bw.close();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
	}
}