Reference > Classes

Iterator

Definition

Iterator var = .... ;

Extends

• Object

Extended By

None

Method Summary

Owner	Name	Return Type	Description
Object	getClassName()	String	Returns the string name of this object's class type.
Iterator	hasNext()	Object	Returns "true" if there are more elements remaining in the iterator, i.e when next() returns an element, and "false" if not.
Iterator	next()	Object	Returns the next value from the iterator
Object	toJson()	String	Returns a string of a json representation of this object.

Method Definitions

---

getClassName()

String Object::getClassName()

Description

Returns the string name of this object's class type.

Example 17

Set s = new Set("a", "b", "c");
Iterator i = s.iterator();
i.getClassName();

// i.getClassName() = Iterator

---

hasNext()

Object Iterator::hasNext()

Description

Returns "true" if there are more elements remaining in the iterator, i.e when next() returns an element, and "false" if not.

Example 1

Set s = new Set(1, 2, 3);
Iterator i = s.iterator();
int setsize = 0;
while(i.hasNext()) { 
    i.next();
    setsize++;
}
// setsize = 3

Where sets don't natively have a size() method, iterators can be used instead to determine the size of a set.

---

next()

Object Iterator::next()

Description

Returns the next value from the iterator

Example 1

Set s = new Set(1, 2, 3);
Iterator i = s.iterator();
string nextvalue = i.next(); //iterate to the next element

// nextvalue = 1
// i.next() = 2

---

toJson()

String Object::toJson()

Description

Returns a string of a json representation of this object.

Example 17

Set s = new Set("a", "b", "c");
Iterator i = s.iterator();
i.toJson();

// i.toJson() = "java.util.LinkedHashMap$LinkedKeyIterator@1280851e"