How do I make a delay in Java

Question

I am trying to do something in Java and I need something to wait   delay for an amount of seconds in a while loop   while  true        if  i    3            i   0             ceva i  setSelected true           I need to wait here      ceva i  setSelected false           I need to wait here      i        I want to build a step sequencer and I m new to Java  Any suggestions

User · Answer

You need to use the Thread sleep   call   More info here  http   docs oracle com javase tutorial essential concurrency sleep html

User · Answer

Use  Thread sleep 100    The unit of time is milliseconds  For example   public class SleepMessages       public static void main String args            throws InterruptedException           String importantInfo                    Mares eat oats                Does eat oats                Little lambs eat ivy                A kid will eat ivy too                      for  int i   0               i  lt  importantInfo length               i                    Pause for 4 seconds             Thread sleep 4000                 Print a message             System out println importantInfo i

User · Answer

I know this is a very old post but this may help someone  You can create a method  so whenever you need to pause you can type pause 1000  or any other millisecond value   public static void pause int ms        try           Thread sleep ms         catch  InterruptedException e            System err format  IOException   s n   e             This is inserted just above the public static void main String   args   inside the class  Then  to call on the method  type pause ms  but replace ms with the number of milliseconds to pause  That way  you don t have to insert the entire try-catch statement whenever you want to pause

User · Answer

Use this  public static void wait int ms        try               Thread sleep ms             catch InterruptedException ex                Thread currentThread   interrupt             and  then you can call this method anywhere like  wait 1000

User · Answer

Use Thread sleep 1000    1000 is the number of milliseconds that the program will pause   try       Thread sleep 1000     catch InterruptedException ex        Thread currentThread   interrupt

User · Answer

If you want to pause then use java util concurrent TimeUnit   TimeUnit SECONDS sleep 1     To sleep for one second or  TimeUnit MINUTES sleep 1     To sleep for a minute   As this is a loop  this presents an inherent problem - drift  Every time you run code and then sleep you will be drifting a little bit from running  say  every second  If this is an issue then don t use sleep   Further  sleep isn t very flexible when it comes to control   For running a task every second or at a one second delay I would strongly recommend a ScheduledExecutorService and either scheduleAtFixedRate or scheduleWithFixedDelay   For example  to run the method myTask every second  Java 8    public static void main String   args        final ScheduledExecutorService executorService   Executors newSingleThreadScheduledExecutor        executorService scheduleAtFixedRate App  myTask  0  1  TimeUnit SECONDS      private static void myTask         System out println  Running        And in Java 7   public static void main String   args        final ScheduledExecutorService executorService   Executors newSingleThreadScheduledExecutor        executorService scheduleAtFixedRate new Runnable              Override         public void run                 myTask                     0  1  TimeUnit SECONDS      private static void myTask         System out println  Running

User · Answer

Using TimeUnit SECONDS sleep 1   or Thread sleep 1000   Is acceptable way to do it  In both cases you have to catch InterruptedExceptionwhich makes your code Bulky There is an Open Source java library called MgntUtils  written by me  that provides utility that already deals with InterruptedException inside  So your code would just include one line   TimeUtils sleepFor 1  TimeUnit SECONDS     See the javadoc here  You can access library from Maven Central or from Github  The article explaining about the library could be found here

[java] How do I make a delay in Java?

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