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Biblioteka

Iterator Worksheet

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Posljednje ažuriranje about 2 years ago
4 questions
1
Pitanje 1
1.

What is output by the code at right?

ArrayList<Integer> x = new ArrayList<Integer>();

x.add(11);

x.add(9);

Iterator<Integer> it = x.iterator();

System.out.println(it.next());

System.out.println(it.next());

1
Pitanje 2
2.

What is output by the code at right?

ArrayList<Integer> w = new ArrayList<Integer>();

w.add(4);

w.add(6);

w.add(8);

Iterator<Integer> iter = w.iterator();

while(iter.hasNext()){

System.out.println(iter.next());

iter.remove();

}

System.out.println(w);

1
Pitanje 3
3.

1
Pitanje 4
4.

What is output by the code at right?

ArrayList<Integer> z;

z = new ArrayList<Integer>();

z.add(3);

z.add(7);

z.add(3);

z.add(7);

z.add(9);

z.add(5);

System.out.println(z);

Iterator<Integer> itera = z.iterator();

while(itera.hasNext()){

if(itera.next().compareTo(7)==0)

itera.remove();

}

System.out.println(z);

What is output by the code at right?

ArrayList<Integer> a = new ArrayList<Integer>();

a.add(5);

a.add(6);

a.add(9);

a.add(7);

a.add(2);

ListIterator<Integer> iterator = a.listIterator();

iterator.next();

iterator.set(1);

iterator.next();

iterator.set(4);

iterator.previous();

iterator.remove();

iterator.previous();

iterator.set(0);

System.out.println(a);