public class File002 {
public static void main(String[] args) {
File f = new File("/Users/apple/Desktop/docker");
printFile(f,0);
}
static void printFile(File file, int level){
for(int i=0; i<level; i++){
System.out.print("-");
}
System.out.println(file.getName());
if(file.isDirectory()){
File[] files = file.listFiles();
for(File temp:files){
printFile(temp,level+1);
}
}
}
}