JAVA IO - 是不是文件check

import java.io.File;


public class IsFile {
    public static void main(String args[]){
    	File f = new File("c:\\work\\hello");
    	isFile(f);
    	
    }

	private static void isFile(File f) {
		if(f.isFile()){
    		System.out.println("It's a file " + f.getName());
    	}else{
    		System.out.println("It's a folder " + f.getName());
    		for(File file : f.listFiles()){
    			isFile(file);
    		}
    	}
	}
}