Iteration loop inside another loop

Question

Is there any way I can use an Iterator inside another loop? I am asking this because I can't find a way to bring the iterator at the start of the list again after the first loop is done and therefore at a second loop the iter.hasNext() will give me false

Iterator iter = list.iterator();
for (int i=0;i<30;i++)
{
 while (iter.hasNext())
 {
  ...
 }

}

Well mind stops working sometimes... I don't know why I didn't think of that. — JimS
– JimS, Commented Apr 29, 2015 at 23:19

Evan Williams · Accepted Answer · 2015-04-29 23:16:17Z

2

Iterator iter;
for (int i=0;i<30;i++)
{
    iter = list.iterator();
    while (iter.hasNext())
     {
      ...
     }

}

answered Apr 29, 2015 at 23:16

Evan Williams

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Comments

Mureinik · Accepted Answer · 2015-04-29 23:15:58Z

0

You could just reset the iterator in the outer loop:

for (int i=0;i<30;i++) {
    Iterator iter = list.iterator();
    while (iter.hasNext()) {
        Object obj = iter.next();
    }
}

answered Apr 29, 2015 at 23:15

Mureinik

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Comments

Karol Król · Accepted Answer · 2015-04-29 23:18:03Z

0

The iterator was consumed during first cycle of a loop (i==0). To fix the problem u need to reinitialise the item reference inside a loop. Best!

answered Apr 29, 2015 at 23:18

Karol Król

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