java统计单个文件行数

package test;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.text.DecimalFormat;
import java.text.NumberFormat;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class LineNum extends JFrame{
private JPanel topPanel = new JPanel();  
    private JPanel bottomPanel = new JPanel();  
    private JButton fileChoose = new JButton("选择目录");  
    private JTextField fileField = new JTextField(20);  
    private JFileChooser fc = new JFileChooser("选择目录");   
    private JTextArea filePathArea = new JTextArea(5 , 20);   
      
    /**普通行数*/ 
    private long normalLines=0;  
    /**注释行数*/ 
    private long commentLines=0;  
    /**空白行数*/ 
    private long spaceLines=0;  
    /**总行数*/ 
    private long totalLines=0;  

    private DecimalFormat myFormat = null;  
      
    public LineNum(String title)  
    {  
        super(title);         
        //设置面板  
        Container container = getContentPane();  
        container.setLayout(new BorderLayout());  
        topPanel.setLayout(new GridLayout(1 , 2));  
        bottomPanel.setLayout(new BorderLayout());  
        topPanel.add(fileChoose);  
        topPanel.add(fileField);   
        bottomPanel.add(new JScrollPane(filePathArea));            
        container.add(topPanel , BorderLayout.NORTH);  
        container.add(bottomPanel , BorderLayout.CENTER);    
          
        //添加选择目录监听，默认获取的是选择文件所在的父目录，程序统计对象是此父目录及其子目录下的所有java文件  
        fileChoose.addActionListener(new ActionListener()  
        {  
            public void actionPerformed(ActionEvent e)   
            {                 
                int result = fc.showOpenDialog(LineNum.this);  
                if(result == JFileChooser.APPROVE_OPTION)  
                {                     
                    String path = fc.getSelectedFile().getAbsolutePath();  
                    fileField.setText(path);   
                    File file = new File(path);  
                    CalculateLineNum(file);  
                }  
            }  
        });  
    }     
 
    /* 
     * 计算并显示统计信息 
     */ 
    private void CalculateLineNum(File file)  
    {  
        if(file.exists())  
        {  
        this.setNormalLines(0L);
            this.setCommentLines(0L);
            this.setSpaceLines(0L);
            this.setTotalLines(0L);
            displayLineNum(file);  
            myFormat = (DecimalFormat)NumberFormat.getPercentInstance();  
            myFormat.applyPattern("0.00%");   
            totalLines=normalLines+spaceLines+commentLines;
            filePathArea.setText("");
            filePathArea.setText(filePathArea.getText() + "\n" + " 总行数：" + totalLines + "行");  
            filePathArea.setText(filePathArea.getText() + "\n" + " 程序行数：" + normalLines + "行");  
            filePathArea.setText(filePathArea.getText() + "\n" + " 注释行数：" + commentLines + "行");  
            filePathArea.setText(filePathArea.getText() + "\n" + " 空行行数：" + spaceLines + "行");  
         
        }  
    }  
      
    //循环访问目录及子目录，统计代码总行数，注释行数及空行行数  
    public void displayLineNum(File file)  
    {  
    BufferedReader br=null;  
        boolean comment=false;  
        try {  
            br=new BufferedReader(new FileReader(file));  
            String line="";  
            while((line=br.readLine())!=null){  
                line=line.trim();//去除空格  
                //空白
                if(line.matches("^[\\s&&[^\\n]]*$")) {     
                       spaceLines ++;     
                }
                //  //
                else if(line.startsWith("//")) {     
                    commentLines ++;     
                }
                // 有/*的情况
                else if(line.indexOf("/*") != -1)
                {  
                // /*开始的情况
                if(line.startsWith("/*"))
                {  
                // 同一行里有*/
                if(line.indexOf("*/") != -1)
                    {  
                //以*/结尾
                    if(line.endsWith("*/"))
                    {
                    commentLines ++;
                    }
                    else
                    {
                    normalLines ++;    
                    }
                    }
                else
                {  
                commentLines ++;  
                comment = true;
                }               
               
                }
                // /*不是开始的情况
                else
                {  
                //同一行里没有*/
                if(line.indexOf("*/") == -1)
                {
                comment = true;
                normalLines ++;    
                }
                }
                }
                else if(true == comment)
                {                            
                       //是否有*/
                       if(line.indexOf("*/") != -1)
                       {   
                       if(line.endsWith("*/"))
                       {
                       commentLines ++; 
                       }
                       else
                       {
                       normalLines ++;    
                       }
                           comment = false;     
                       }  
                       else
                       {
                       commentLines ++; 
                       }
                }
                else
                {     
                    normalLines ++;     
                }   
              }  
              
        } catch (Exception e) {  
            e.printStackTrace();  
        }  

    }  
      
    public static void main(String args[])  
    {  
        LineNum lineFrame=new LineNum("java程序行数统计");  
        lineFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
        lineFrame.setBounds(212,159,600,420);  
        lineFrame.setVisible(true);   
        lineFrame.setResizable(false);    
    }

public long getNormalLines() {
return normalLines;
}

public void setNormalLines(long normalLines) {
this.normalLines = normalLines;
}

public long getCommentLines() {
return commentLines;
}

public void setCommentLines(long commentLines) {
this.commentLines = commentLines;
}

public long getSpaceLines() {
return spaceLines;
}

public void setSpaceLines(long spaceLines) {
this.spaceLines = spaceLines;
}

public long getTotalLines() {
return totalLines;
}

public void setTotalLines(long totalLines) {
this.totalLines = totalLines;
}  
   
   

}