JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: How to swap two elements in a ArrayList?


Description:

This example gives how to swap two elements in the ArrayList. By calling Collections.swap() method you can swap two elements of the ArrayList. You have to pass the indexes which you need to swap.


Code:
package com.java2novice.arraylist;

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

public class MyArrayListSwap {

	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");
		list.add("Movie");
		list.add("Girl");
		
		Collections.swap(list, 2, 5);
		System.out.println("Results after swap operation:");
		for(String str: list){
			System.out.println(str);
		}
	}
}

Output:
Results after swap operation:
Java
Cric
Movie
Watch
Glass
Play
Girl
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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?
Knowledge Centre
Default value of a local variables?
The local variables are not initialized to any default values. We should not use local variables with out initialization. Even the java compiler throws error.

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Reference: Java™ Platform Standard Ed. 6 - API Specification | Java is registered trademark of Oracle.
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