source: java2python/core/src/test/hasnext/testcode/HasNext.java

package testcode;

import java.util.Arrays;
import java.util.Iterator;

/**
 * To test iterator hasNext() which is pretty special in python
 */
public class HasNext {

        public String stringit(Iterator<?> it) {
                String res = "";
                while (it.hasNext())
                        res += it.next().toString();
                return res;
        }

        private Iterator<?> itt;

        /**
         * Same test, but now it uses a field rather than a local var for the
         * iteration process. This makes huge difference in python also related to
         * all the hacks we need for hasnext().
         * 
         * @param it
         * @return
         */
        public String stringitfield(Iterator it) {
                this.itt = it;
                String res = "";
                while (itt.hasNext())
                        res += itt.next().toString();
                return res;
        }

        static public void main(String[] args) {
                HasNext obj = new HasNext();
                System.out.println(obj.stringit(Arrays.asList(1, 2, 3).iterator()));
                System.out.println(obj.stringit(Arrays.asList().iterator()));
                System.out.println(obj.stringit(Arrays.asList("a", "b").iterator()));
                System.out.println(
                                obj.stringit(Arrays.asList("fielda", "fieldb").iterator()));
        }
}