如何保持程序检查while循环是否为真Java

Question

My Code:

import java.time.*;
import java.time.temporal.*;

class {
public static void main(String[] arguments)  {

    LocalDateTime now = LocalDateTime.now();
    int Seconds = now.get(ChronoField.SECOND_OF_MINUTE);

    do{
        \\ My Code is Here          
    } while ( Seconds <= 00);

I have it so that it should repeat when the minute changes but it won't loop unless I start it right before the minute changes. How do get the program to wait until the While becomes true so it will loop?

Answer 1

You can wait for the amount of seconds to reach a full minute:

LocalDateTime now = LocalDateTime.now();
int seconds = now.get(ChronoField.SECOND_OF_MINUTE);
if (seconds > 0) {
    TimeUnit.SECONDS.sleep(60-seconds);
}

In fact, if you want to repeat some code every full minute, you should wait inside your loop:

do {
    LocalDateTime now = LocalDateTime.now();
    int seconds = now.get(ChronoField.SECOND_OF_MINUTE);
    if (seconds > 0) {
        TimeUnit.SECONDS.sleep(60-seconds);
    }
    // your code
    TimeUnit.SECONDS.sleep(1);  // sleep for 1 second, so your code doesn't get executed twice per minute
} while(true/*best to have some proper condition in here*/);