递归方法和stack消除递归打印目录下的文件夹及文件名

import java.io.File;
import java.util.Stack;

public class PrintDir {

public static void main(String args[]){

File dir = new File("D://");
Long t1 = System.currentTimeMillis();
printDir1(dir);
Long t2 = System.currentTimeMillis();
System.out.println(t2-t1);
printDir2(dir);
System.out.println(System.currentTimeMillis()-t2);
}

/**
* 递归打印文件目录及文件名
* @param dir
*/
public static void printDir1(File dir){
System.out.println(dir.getAbsolutePath());
String [] res = dir.list();
for(String str: res){
   File file = new File(dir,str);
   if(file.isDirectory()){
    printDir1(file);
   }else{
    System.out.println(file.getAbsolutePath());
   }
}
}

/**
* 用stack消除递归打印文件目录及文件名
* @param dir
*/
public static void printDir2(File dir){
Stack stack = new Stack();
stack.push(dir);
while(!stack.isEmpty()){
   File f = (File) stack.pop();
   System.out.println(f.getAbsolutePath());
   String [] ss = f.list();
   for(String ts:ss){
    File file = new File(f,ts);
    if(file.isDirectory()){
     stack.push(file);
    }else{
     System.out.println(file.getAbsolutePath());
    }
   }
}
}

}

摘自 ITSource的专栏

补充：软件开发 , Java ,