JAVA EXAMPLE PROGRAMS

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Program: How to reverse ArrayList content?


Description:

This example shows how to reverse ArrayList content. You can reverse the content by calling Collections.reverse() method. You have to pass ArrayList instance to this method, which reverses the content.


Code:
package com.java2novice.arraylist;

import java.util.ArrayList;
import java.util.Collections;

public class MyArrayListReverse {

	public static void main(String a[]){
		ArrayList<String> list = new ArrayList<String>();
		list.add("Java");
		list.add("Cric");
		list.add("Play");
		list.add("Watch");
		list.add("Glass");
		Collections.reverse(list);
		System.out.println("Results after reverse operation:");
		for(String str: list){
			System.out.println(str);
		}
	}
}

Output:
Results after reverse operation:
Glass
Watch
Play
Cric
Java
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List Of All ArrayList Sample Programs:

  1. Basic ArrayList Operations.
  2. How to read all elements in ArrayList by using iterator?
  3. How to copy or clone a ArrayList?
  4. How to add all elements of a list to ArrayList?
  5. How to delete all elements from my ArrayList?
  6. How to find does ArrayList contains all list elements or not?
  7. How to copy ArrayList to array?
  8. How to get sub list from ArrayList?
  9. How to sort ArrayList using Comparator?
  10. How to reverse ArrayList content?
  11. How to shuffle elements in ArrayList?
  12. How to swap two elements in a ArrayList?
  13. How to convert list to csv string format?
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Purpose of garbage collection
The garbage collection process is to identify the objects which are no longer referenced or needed by a program so that their resources can be reclaimed and reused. These identified objects will be discarded.
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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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