查询文件夹中的文件种类及行数

package scr;

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

public class Work620 {
public static int num = 0;
public static int row = 0;

public static void main(String[] args) {
show(new File("e:/user"));
System.out.printf("共有个%dJava文件，共有%d行代码",num,row);
}
public static void show(File file){
if(file.exists() && file.isDirectory()){
File[] fs = file.listFiles();
for(File f: fs){
if(f.isFile() && f.getName().endsWith(".java")){
num++;
int rows=0;
try{
BufferedReader br =new BufferedReader(new FileReader(f));
String rr = "";
while((rr=br.readLine())!=null){
rows++;
}
}catch(Exception e){

}
System.out.println(f.getAbsolutePath()+"(共" + rows + "行)");
row +=rows;
}else{
show(f);
}
}
}
}
}