Step by Step solution about How to resolve the algorithm Spinning rod animation/Text step by step in the Java programming language

The Java code you provided is a simple program that prints a spinning rod on the terminal. The program uses the System.out.print() method to print the rod and the Thread.sleep() method to pause the program for a short period of time. The \033[2J escape sequence is used to clear the terminal and the \033[0;0H escape sequence is used to place the cursor at the top left corner of the terminal. The \033[?25h escape sequence is used to restore the cursor.

Here is a breakdown of the code:

• The main() method is the entry point of the program. It initializes the string a to the value "|/-\". This string represents the four different positions of the spinning rod.
• The System.out.print("\033[2J"); line clears the terminal.
• The long start = System.currentTimeMillis(); line gets the current time in milliseconds. This time is used to track how long the program has been running.
• The while (true) loop is the main loop of the program. It will continue to run until the break statement is executed.
• The for (int i = 0; i < 4; i++) loop iterates through the four different positions of the spinning rod.
• The System.out.print("\033[2J"); line clears the terminal.
• The System.out.print("\033[0;0H"); line places the cursor at the top left corner of the terminal.
• The for (int j = 0; j < 80; j++) loop prints the spinning rod. The number 80 represents the width of the terminal in characters.
• The Thread.sleep(250); line pauses the program for 250 milliseconds. This gives the user time to see the spinning rod.
• The long now = System.currentTimeMillis(); line gets the current time in milliseconds.
• The if (now - start >= 20000) break; line checks if the program has been running for more than 20 seconds. If so, the break statement is executed and the program exits.
• The System.out.print("\033[?25h"); line restores the cursor.

The output of the program is a spinning rod that rotates on the terminal. The rod will continue to spin until the program has been running for 20 seconds.

public class SpinningRod
{
    public static void main(String[] args) throws InterruptedException {
        String a = "|/-\\";
        System.out.print("\033[2J");   // hide the cursor
        long start = System.currentTimeMillis();
        while (true) {
            for (int i = 0; i < 4; i++) {
                System.out.print("\033[2J");     // clear terminal
                System.out.print("\033[0;0H");   // place cursor at top left corner
                for (int j = 0; j < 80; j++) {   // 80 character terminal width, say
                    System.out.print(a.charAt(i));
                }
                Thread.sleep(250);
            }
            long now = System.currentTimeMillis();
            // stop after 20 seconds, say
            if (now - start >= 20000) break;
        }
        System.out.print("\033[?25h"); // restore the cursor
    }
}