How to reiterate while loop containing scanner in order to restart code in java?

Basically the issue is that once the main method completes, it prompts to restart the code or not, except it terminates after prompting, no matter what I enter. Note that this is just the main class. How do I fix this?

public static void main(String[] args) {    Scanner scan = new Scanner(System.in);    while (true) {              Random rand = new Random();            System.out.print("\nEnter what to paste: ");            String input = scan.nextLine();            System.out.print("\nEnter typing speed (10 is reccommended) (Lower is faster, higher is slower): ");            int speed = scan.nextInt();            try{Thread.sleep(3000);} catch(InterruptedException e){}            for(int i = 0; i < input.length(); i++){                try{Thread.sleep(rand.nextInt(30 * speed));} catch(InterruptedException e){}                int delete = rand.nextInt(20 * speed);                if(delete == 5){                    int randomChar = rand.nextInt(10);                    switch(randomChar){                        case 1: convert('a'); break;                        case 2: convert('b'); break;                        case 3: convert('c'); break;                        case 4: convert('d'); break;                        case 5: convert('e'); break;                        case 6: convert('f'); break;                        case 7: convert('g'); break;                        case 8: convert('h'); break;                        case 9: convert('i'); break;                        default:convert('j'); break;                    }                    try{Thread.sleep(40 * speed);} catch(InterruptedException e){}                    doType(KeyEvent.VK_BACK_SPACE);                    try{Thread.sleep(20 * speed);} catch(InterruptedException e){}                }                if(input.charAt(i) == '\\') {                    if(input.charAt(i + 1) == 't') {                        convert('\t');                        i++;                    }                    else if(input.charAt(i + 1) == 'n') {                        convert('\n');                        i++;                    }                    else                        convert(input.charAt(i));                }                   else                    convert(input.charAt(i));            }        System.out.print("\nDo you want to paste again? (y/n): ");            String choice = scan.next();            if(!choice.equals("y"))                break;    }         scan.close();    }

I tried making the main method its own method, then calling the method within a while loop in the main method. All the same result.