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Thread: I want to display the last record first, and the first record last

  1. #1
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    Default I want to display the last record first, and the first record last

    Hello All,
    I have this code pulling data from an SQLite db with multiple columns and records. It works fine, but it displays the record information with the 1st record being displayed 1st. I want to reverse the order so that the LAST record displays first, then the rest with the 1st record being displayed last.... is there an easy way to do this? I've seen several youtube vids but none of them address what i'm trying to do, they just reverse the order of the words, i.e.: Hello becomes olleH. Any help is appreciated. Here is the code i'm using to create the stringbuffer:


    public void viewAll() {
            button_view.setOnClickListener(
                    new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            Cursor res = myDb.getLoadData();
                            if(res.getCount() == 0) {
                                // show message
                                showMessage ("Error","No loads found...");
                                return;
                            }
     
                            StringBuffer buffer = new StringBuffer();
                            while (res.moveToNext()) {
                                buffer.append("UNIQUE ID #: " + res.getString(0) + "\n\n");
     
                                buffer.append("LOAD #: " + res.getString(1) + "\n\n");
     
                                buffer.append("PICKUP AT: " + "\n" + res.getString(9) + "\n\n");
                                buffer.append("ON: " + "\n" + res.getString(10) + "\n\n");
     
                                buffer.append("DELIVER TO: " + "\n" + res.getString(14) + "\n\n");
                                buffer.append("ON: " + "\n" + res.getString(15) + "\n\n");
     
                                buffer.append("PAY: " + res.getString(19) + "\n\n");
                                buffer.append("========================"  + "\n\n");
     
                            }
     
                            // Show all data
                            showMessage("LOADS - Basic Info",buffer.toString());
                        }
     
                    }
            );
    Last edited by jgc73; April 2nd, 2020 at 01:54 PM. Reason: part of the code didnt copy/paste

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: I want to display the last record first, and the first record last

    Can you push the records onto a stack and remove them in reverse order?

    Please edit your post and wrap your code with code tags:

    [code]
    **YOUR CODE GOES HERE**
    [/code]

    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: I want to display the last record first, and the first record last

    hmmm, I don't know how to do that. I'm just a beginner in java, and it's only because I've recently gotten interested in it. I'll see if I can find some youtube beginner guides on stacks.... I was just hoping there was an easy way to reverse the order of the records being displayed... Thx for the reply

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: I want to display the last record first, and the first record last

    Look at the ArrayDeque class. It has methods for removing elements from either end of the queue.
    If you don't understand my answer, don't ignore it, ask a question.

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