add, remove and sort elements of an ArrayList - Java Algorithm

Java examples for Algorithm:List

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Description

add, remove and sort elements of an ArrayList

Demo Code

package arrays;/*from w w w.  ja  va 2s .com*/

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

public class ArrayListExample {

  public static void main(String[] args) {
    int maxElements = 5000; // Determines the maximum number of elements in
                // the ArrayList
    int randomNumber; // The random number to add to the ArrayList

    // This is how to declare an ArrayList of Integers
    ArrayList<Integer> listOfNumbers = new ArrayList<Integer>();

    // Populate the ArrayList
    for (int loopCounter = 0; loopCounter < maxElements; loopCounter++) {
      randomNumber = (int) (Math.random() * 90000);
      listOfNumbers.add(randomNumber);
    }

    // Sort ArrayList
    Collections.sort(listOfNumbers);

    // Output the ArrayList, and removes the elements as they are printed
    for (int loopCounter = 0; loopCounter < listOfNumbers.size(); loopCounter++) {
      System.out.println(listOfNumbers.get(loopCounter));

      listOfNumbers.remove(loopCounter);
      loopCounter--; // Used to keep the loopCounter at 0
    }

    System.out.println();
  }

}

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