个人项目：WC(Java 实现)

   public void count(){   //计算文件中行数、字符数和单词数
       FileReader fr = null; 
       try {
        fr = new FileReader(this.filename);
        
        int firstread,nowread;
        char c_firstread,c_nowread; //标记文件中的当前字符和前一个字符
        
        if((firstread = fr.read())!=-1){ //判断文件是否为空   
             c_firstread = (char)firstread;
             
             this.lines++;
             if(!(c_firstread==‘\n‘)) this.symbols++;
             
             for(nowread = fr.read();;nowread = fr.read()){  //依次读文件中的每个字符
                
                 if(nowread==-1){//判断是否只有一个字符
                     if((c_firstread>=‘A‘&&c_firstread
                             (c_firstread>=‘a‘&&c_firstread))
                         words++;
                     break;
                 }
                 c_firstread = (char)firstread;
                 c_nowread = (char)nowread;
                 //System.out.print(c_nowread);
                 
                 if(nowread==‘\n‘) this.lines++;//当前所读的是换行符，行数加一
                 
                 if(!((c_nowread>=‘A‘&&c_nowread=‘a‘&&c_nowread)))
                     if((c_firstread>=‘A‘&&c_firstread=‘a‘&&c_firstread))
                     words++;//如果当前所读的是非字母，前一个所读为字母，单词数加一
                 
                 if(!(c_nowread==‘\n‘)) this.symbols++;
                 
                 firstread = nowread;
             }
        }
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }finally{
        if(fr!=null)
            try {
                fr.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
    }
   }

    else if(arguement.equals("-s"))//第一个参数为"s",显示该目录下符合的文件的统计信息
        {
            File parent = Filename.getParentFile();//获取文件所在的目录
    
            File[] otherfiles = parent.listFiles();//获取目录中的文件
           
            //如果后缀为.java的文件进行统计
            for(File f:otherfiles){
                if(f.toString().endsWith(".java")){
                    FileCount fc = new FileCount(f);
                    fc.count();
                    System.out.println("\nFile "+f+"\nsymbols are "+fc.getSymbols()+
                            "\nlines are "+fc.getLines()+"\nwords are "+fc.getWords());
                }
            }
        } 

//如果参数为"x",创建图形界面类，显示所选文件的统计信息
       if(arguement.equals("-x")){
           JFileChooser jfc = new JFileChooser();//创建文件发送选择框
            jfc.setMultiSelectionEnabled(false);
            jfc.showOpenDialog(new JLabel());
            
            File file = jfc.getSelectedFile();//获取选中的文件
            if(file!=null) {
                if(file.toString().endsWith(".java"))
                new CountFrame(file);
               else System.out.println("ERRORFile");
            }
           else System.out.println("ERRORFile");
}

JTextArea textarea = new JTextArea(filename.toString());//文本框
        JScrollPane scroller = new JScrollPane(textarea);
        
        FileReader fr = null;
        BufferedReader bfr = null;
        char[] buff = new char[128];
        try {
            fr = new FileReader(filename);
            bfr = new BufferedReader(fr);
            while(bfr.read(buff)!=-1)//读取文本，并显示在文本框中
            {
                String s = new String(buff);
                textarea.append(s);
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
                try {
                    if(bfr!=null) bfr.close();
                    if(fr!=null)fr.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
        }
        
        //创建FileCount类对象，统计文本中的行数、字符数和词数
        FileCount filecount = new FileCount(this.filename);
        filecount.count();
        textarea.append("\n\nSysmbols are "+filecount.getSymbols()+"\nwords are "+filecount.getWords()+
                        "\nlines are "+filecount.getLines());