I am working on a program that shows all folders and sub folders in proper format but i am not able to maintain proper spacing between them

public void listf(String directoryName) {

    File directory = new File(directoryName);

    File[] fList = directory.listFiles();
    for (File file : fList) {
        if (file.isDirectory()) {
            for (File file1 : fList) {
                System.out.print("\t");
            }
          System.out.println(file.getName());
          listf(file.getAbsolutePath());
          
    }
}
}

CodePudding user response：

Here is my solution to that problem:

public void listf(String directoryName){
    recursiveListf(directoryName,2,0);
}

public void recursiveListf(String directoryName, int depth, int tabs) {
    if(depth<=0){
        return;
    }
    if(tabs<0){
        return;
    }
    File directory = new File(directoryName);

    File[] fList = directory.listFiles();
    for (File file : fList) {
        if (file.isDirectory()) {
            recursiveListf(directoryName "/" file.getName(), depth-1, tabs 1);
        }else{
            for(int i = 0; i < tabs; i  ){
                System.out.print("\t");
            }
            System.out.println(file.getAbsolutePath());
        }
    }
}

The depth describes how deep you want your folder structure to be displayed.

CodePudding user response：

If by this you mean to say you want indentation that indicates folder depth, then it's a recursive problem, with each call to itself adding another space.

A good video on understanding recursive problems