Java : Cursor : Iterator

Iterators are used to traverse through the collection element. Its applicable for all collection classes.

Example :

import java.util.Iterator;
import java.util.ArrayList;

public class CursorTest {

    public void iteratorTest(){

        ArrayList<Integer> ar=new ArrayList<Integer>();
        for(int i=0;i<10;i++){
            ar.add(i);
        }
        System.out.println(ar);

        Iterator<Integer> it=ar.iterator();
        while (it.hasNext()) {
            Integer intg=(Integer)it.next();
            if (itg % 3==0) {
                System.out.println(itg);
            }else{
                it.remove();
            }
        }
        System.out.println(ar);  
    }
    
}

Supported methods :

.hasnext()-Checks if there is any element present in the collection. Return type is boolean .
.next() -Returns the next element in the collection. Return type is object .
.remove()- remove the element from the collection. Does not return anything (void) .