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Program: How to remove an element from collection using Iterator object?


Description:

Below example shows how to remove an element from collection object using Iterator object. The remove() method removes from the underlying collection the last element returned by the iterator


Code:
package com.java2novice.iterator;

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

public class MyItrRemoveElement {

	public static void main(String a[]){
		
		String removeElem = "Perl";
		List<String> myList = new ArrayList<String>();
		myList.add("Java");
		myList.add("Unix");
		myList.add("Oracle");
		myList.add("C++");
		myList.add("Perl");
		System.out.println("Before remove:");
		System.out.println(myList);
		Iterator<String> itr = myList.iterator();
		while(itr.hasNext()){
			if(removeElem.equals(itr.next())){
				itr.remove();
			}
		}
		System.out.println("After remove:");
		System.out.println(myList);
	}
}

Output:
Before remove:
[Java, Unix, Oracle, C++, Perl]
After remove:
[Java, Unix, Oracle, C++]
<< Previous Program 

List Of Iterator Sample Programs:

  1. How to iterate through collection objects?
  2. How to remove an element from collection using Iterator object?
Knowledge Centre
Can interface be final?
No. We can not instantiate interfaces, so in order to make interfaces useful we must create subclasses. The final keyword makes a class unable to be extended.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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