统计项目中Java文件数和Java代码行数

其实就是使用递归遍历目录下所有文件。

import java.io.BufferedReader;  
import java.io.File;  
import java.io.FileNotFoundException;  
import java.io.FileReader;  
import java.io.IOException;  
  
public class JavaCodeLines {  
    private static final String PROJECT_DIR = "C:\\workspace\\YourProj";  
    private static int fileNum = 0;  
    private static int lineNum = 0;  
  
    private static void listNext(File dir) {  
        File[] files = dir.listFiles();  
  
        for (int i = 0; i < files.length; i++) {  
            if (files[i].isDirectory()) {  
                listNext(files[i]);  
            } else {  
                // System.out.println(fs[i].getAbsolutePath());  

                try {  
                    if (files[i].getName().endsWith(".java")) {  
                        fileNum++;  
                        BufferedReader br = new BufferedReader(new FileReader(  
                                files[i]));  
                        while (br.readLine() != null) {  
                            lineNum++;  
                        }  
                    }  
                } catch (FileNotFoundException e) {  
                    e.printStackTrace();  
                } catch (IOException e) {  
                    e.printStackTrace();  
                }  
            }  
        }  
    }  
  
    public static void main(String[] args) throws Exception {  
        File root = new File(PROJECT_DIR);  
        listNext(root);  
        System.out.println("Java files number: " + fileNum);  
        System.out.println("Java code lines: " + lineNum);  
    }  
  
}