統計代碼的小工具，程序功能不是很完善，歡迎大傢多給意見
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.UIManager;
public class CodeCounterFrame extends JFrame
{
JMenuBar menuBar = new JMenuBar();
JMenu fileMenu = new JMenu("文件");
JMenuItem openMenuItem = new JMenuItem("打開");
JTextArea txa = new JTextArea();
JScrollPane jsp =new JScrollPane(txa);
String output = "";
static long codeLines = 0;
static long commentLines = 0;
static long blankLines = 0;
public CodeCounterFrame()
{
this.setJMenuBar(menuBar);
menuBar.add(fileMenu);
fileMenu.add(openMenuItem);
txa.setEditable(false); //txa裡面的內容不能被編輯
add(jsp);
//內部匿名類監聽器
openMenuItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
if(e.getSource() == openMenuItem)
{
//點擊瞭打開菜單
//彈出文件選擇器
JFileChooser chooser = new JFileChooser();
chooser.showOpenDialog(null);
//獲取選中的文件
File selectedFile = chooser.getSelectedFile();
BufferedReader br = null;
boolean flag = false;
try {
FileReader reader = new FileReader(selectedFile);//讀取文檔的內容
br = new BufferedReader(reader);
String line = "";
//2讀文件
while ((line = br.readLine()) != null)
{
line = line.trim(); // 除去註釋前的空格
if (line.matches("^[ ]*$"))
{
// 匹配空行
blankLines++;
}
else if (line.startsWith("//"))
{
commentLines++;
}
else if (line.startsWith("/*") && !line.endsWith("*/"))
{
commentLines++;
flag = true;
}
else if (line.startsWith("/*") && line.endsWith("*/"))
{
commentLines++;
}
else if (flag == true)
{
commentLines++;
if (line.endsWith("*/"))
{
flag = false;
}
}
else
{
codeLines++;
}
}
//將結果保存到output
output+=("代碼行數：" + codeLines+"\n"+"註釋行數：" + commentLines+"\n"
+"空白行數：" + blankLines+"\n"+"總行數：" + (codeLines+commentLines+blankLines));
//將統計的結果在txa裡面顯示
txa.setText(output);
}
catch (FileNotFoundException ex)
{
ex.printStackTrace();
}
catch (IOException ex)
{
ex.printStackTrace();
}
finally
{
if (br != null)
{
try {
br.close();
br = null;
}
catch (IOException ex)
{
ex.printStackTrace();
}
}
}
}
}
});
}
//Frame主程序
public static void main(String[] args)
{
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); //windows界面風格
} catch (Exception e) {
e.printStackTrace();
}
CodeCounterFrame frame = new CodeCounterFrame();
frame.setTitle("統計代碼的小工具");
frame.setSize(300,200);
frame.setVisible(true);
frame.setLocationRelativeTo(null);//窗體居中顯示
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
運行的窗口：
輸出的結果：
