WordCount

package myhomework1;

import java.io.BufferedReader;
import java.io.File;

import java.io.FileReader;
import java.io.IOException;

public class WordCount2 {
    public static void main(String[] args) throws IOException {
        WordCount2Test wct = new WordCount2Test();
        wct.testWc();
        System.out.println("**************");
        wct.testWc2();
        System.out.println("**************");
        wct.testWc3();
        System.out.println("**************");
        wct.testWc4();
        System.out.println("**************");
        wct.testWc5();
    }

    public static void wc(char parameter, String file_name) throws IOException {
        File src = new File(file_name);

        switch (parameter) {
        case ‘c‘:
            charcount(src);
            break;
        case ‘w‘:
            wordcount(src);
            break;
        case ‘l‘:
            linecount(src);
            break;
        default:
            break;
        }
    }

    // 统计行数
    public static int linecount(File src) throws IOException {
        int linenum = 0;
        if (src.exists()) {
            BufferedReader br = new BufferedReader(new FileReader(src));
            while (true) {

                if (br.readLine() == null)
                    break;
                else
                    linenum++;
            }
            br.close();
            System.out.println("文件" + src.getName() + "的行数为： " + linenum);
            return linenum;
        } else {
            System.out.println(src.getPath() + " 文件不存在！");
            return 0;
        }
    }

    // 统计字符数
    public static int charcount(File src) throws IOException {
        int charnum = 0;
        int a = 0;
        if (src.exists()) {
            BufferedReader br2 = new BufferedReader(new FileReader(src));
            while (a != -1) {

                a = br2.read();
                if (a >= 33 && a <= 126)
                    charnum++;
                else
                    continue;
            }
            br2.close();
            System.out.println("文件" + src.getName() + "的字符数为： " + charnum);
            return charnum;
        } else {
            System.out.println(src.getPath() + " 文件不存在！");
            return 0;
        }
    }

    // 统计词数
    public static int wordcount(File src) throws IOException {
        int wordnum = 0;
        int a = 0, flag = 0;
        if (src.exists()) {
            BufferedReader br2 = new BufferedReader(new FileReader(src));
            while (a != -1) {
                a = br2.read();
                if ((a >= ‘a‘ && a <= ‘z‘) || (a >= ‘A‘ && a <= ‘Z‘)) {
                    if (flag == 0)
                        flag = 1;
                } else {
                    if (flag == 1) {
                        wordnum++;
                        flag = 0;
                    } else
                        continue;
                }
            }
            br2.close();
            System.out.println("文件" + src.getName() + "的词数数为： " + wordnum);
            return wordnum;
        } else {
            System.out.println(src.getPath() + " 文件不存在！");
            return 0;
        }
    }
}