A small example of JAVA traversing all the files in a folder

import java.io.File;
import java.util.ArrayList;
public class FileTest {
 private static ArrayList<String> filelist = new ArrayList<String>();

 public static void main(String[] args) throws Exception {

    String filePath = "E://Struts2";
    getFiles(filePath);
 } 
 
 static void getFiles(String filePath){
  File root = new File(filePath);
    File[] files = root.listFiles();
    for(File file:files){     
     if(file.isDirectory()){
      
      getFiles(file.getAbsolutePath());
      filelist.add(file.getAbsolutePath());
      System.out.println(" According to "+filePath+" All subdirectories and their files "+file.getAbsolutePath());
     }else{
      System.out.println(" According to "+filePath+" Under all subdirectories "+file.getAbsolutePath());
     }     
    }
 }
}