Java integer list

Question

I am trying to make java go trough a list of numbers  It chooses the first one  gives this as output  waits sleeps like 2000 milliseconds and then give the next one as output  waits 2000 milliseconds  etc   They should not be listed behind eachother so when my list is  10 20 30 40 50  It should not give as output  10 20 30 40 50  But just 50   It would be even better if it was able to repeat itself   So far i tried   List lt Integer gt  myCoords   new ArrayList lt Integer gt     myCoords add 10   myCoords add 20   myCoords add 30   myCoords add 40   myCoords add 50   Iterator lt Integer gt  myListIterator   someList iterator     while  myListIterator hasNext          Integer coord   myListIterator next             But this has no timer  and i am not sure if this will only show  20  or  10 20 30 40 50  as output  And i dont really know how to put a sleep wait command and a repeat command in this  s  might have overlooked the repeat command if its already in   Edit Tyvm all  i can go on with the rest of the coding now

User · Answer

To insert a sleep command you can use Thread.sleep(2000). So the code would be:

List<Integer> myCoords = new ArrayList<Integer>();
myCoords.add(10);
myCoords.add(20);
myCoords.add(30);
myCoords.add(40);
myCoords.add(50);
Iterator<Integer> myListIterator = someList.iterator(); 
while (myListIterator.hasNext()) {
    Integer coord = myListIterator.next();    
    System.out.println(coord);
    Thread.Sleep(2000);
}

This would output: 10 20 30 40 50

If you want the numbers after each other you could use: System.out.print(coord +" " ); and if you want to repeat the section you can put it in another while loop.

List<Integer> myCoords = new ArrayList<Integer>();
myCoords.add(10);
myCoords.add(20);
myCoords.add(30);
myCoords.add(40);
myCoords.add(50);
while(true)
    Iterator<Integer> myListIterator = someList.iterator(); 
    while (myListIterator.hasNext()) {
        Integer coord = myListIterator.next();    
        System.out.print(coord + " ");
        Thread.Sleep(2000);
    }
}

This would output: 10 20 30 40 50 10 20 30 40 50 ... and never stop until you kill the program.

Edit: You do have to put the sleep command in a try catch block

User · Answer

code that works  but output is   10 20 30 40 50   so       List lt Integer gt  myCoords   new ArrayList lt Integer gt         myCoords add 10       myCoords add 20       myCoords add 30       myCoords add 40       myCoords add 50       for  Integer number   myCoords            System out println number           try               Thread sleep 2000             catch  InterruptedException e                e printStackTrace

User · Answer

Let s use some java 8 feature   IntStream iterate 10  x - gt  x   10  limit 5     forEach System out  println     If you need to store the numbers you can collect them into a collection eg   List numbers   IntStream iterate 10  x - gt  x   10  limit 5     boxed      collect Collectors toList       And some delay added   IntStream iterate 10  x - gt  x   10  limit 5     forEach x - gt        System out println x       try         Thread sleep 2000         catch  InterruptedException e             Do something with the exception

User · Answer

If you want to rewrite a line on console  print a control character  r  carriage return    List lt Integer gt  myCoords   new ArrayList lt Integer gt     myCoords add 10   myCoords add 20   myCoords add 30   myCoords add 40   myCoords add 50   Iterator lt Integer gt  myListIterator   myCoords iterator     while  myListIterator hasNext          Integer coord   myListIterator next             System out print   r        System out print coord       Thread sleep 2000

User · Answer

So it would become   List lt Integer gt  myCoords   new ArrayList lt Integer gt     myCoords add 10   myCoords add 20   myCoords add 30   myCoords add 40   myCoords add 50   while true      Iterator lt Integer gt  myListIterator   myCoords iterator         while  myListIterator hasNext              Integer coord   myListIterator next                System out print   r    coord           try      Thread sleep 2000      catch Exception e         handle the exception

[java] Java integer list

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