Shortest way to get an Iterator over a range of Integers in Java

Question

What\'s the shortest way to get an Iterator over a range of Integers in Java? In other words, implement the following:

/** 
* Returns an Iterator over the in         


        

Answer 1

An example using the guava framework. Note that this will not materialize the set (although you have to read the ContiguousSet implementation to verify that).

import com.google.common.collect.ContiguousSet;
import com.google.common.collect.DiscreteDomain;
import com.google.common.collect.DiscreteDomains;

class RangeIterator { 

    public Iterator range(int start, int length) {
        assert length > 0;
        Range dim_range = Ranges.closedOpen(start, start + length);
        DiscreteDomain ints = DiscreteDomains.integers();
        ContiguousSet dim = dim_range.asSet(ints);
        return dim.iterator();
    }
}