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Ivan18113

ArrayList

Mar 5th, 2021
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Java 1.49 KB | None | 0 0
  1. import java.util.*;
  2.  
  3.  
  4. public class App7 {
  5.     public static void main(String[] args) {
  6.         ArrayList<Integer> Numbers = new ArrayList<Integer>();
  7.         Numbers.add(13);
  8.         Numbers.add(26);
  9.         Numbers.add(17);
  10.         Numbers.add(4);
  11.         Numbers.add(181);
  12.  
  13.  
  14.         // Разпечатване на съдържанието
  15.         System.out.println("Content: "+ Numbers);
  16.         System.out.println("Size: " + Numbers.size());
  17.         System.out.println("To string: " + Numbers.toString());
  18.         System.out.println();
  19.  
  20.  
  21.         // Премахване на ИНДЕКС
  22.         System.out.println("Remove element at index [4] => " + Numbers.remove(4));
  23.         System.out.println("Content: " + Numbers);
  24.         System.out.println();
  25.  
  26.  
  27.         // Премахване по ЕЛЕМЕНТ (value)
  28.         System.out.println("Remove element (26) by value: " + Numbers.remove(Numbers.indexOf(26)));
  29.         System.out.println("Content: " + Numbers);
  30.         System.out.println();
  31.  
  32.  
  33.         // Добавяне на елемент на края
  34.         System.out.println("Add element (21) at end: " + Numbers.add(21));
  35.         System.out.println("Content: " + Numbers);
  36.         System.out.println();
  37.  
  38.  
  39.         //Add element at INDEX (position)
  40.         System.out.println("Add element (18) at index [0]: ");
  41.               Numbers.add(0 ,18);
  42.         System.out.println("Content: " + Numbers);
  43.         System.out.println();
  44.  
  45.     }//end of main
  46.  
  47. } //end of class
  48.  
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