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ArrayList.java
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ArrayList.java
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//* Demo of the ArrayList
//* The ArrayList class is the dynamic array found in the java.util package.
public class ArrayList {
public static void main(String[] args) {
// ArrayList<Integer> a1 = new ArrayList<>(); //? Like this i am not implement
// ? the ArrayList this will give an error
java.util.ArrayList<Integer> a2 = new java.util.ArrayList<>(); // Create an instance of the ArrayList
System.out.println("Print the ArrayList-2");
a2.add(10);
a2.add(20);
a2.add(30);
java.util.ArrayList<Integer> a1 = new java.util.ArrayList<>();
System.out.println("Print the ArrayList-1");
a1.add(1);
a1.add(2);
a1.add(3);
a1.add(4);
a1.add(5);
a1.add(6);
a1.add(7);
// a1.add(0,7); //? Also you can add elements with the index
// a1.addAll(a2); // ? You can also insert the an collection in the arrayList
// a1.clear(); //? This will clear the collection
// We can check the if ArrayList contains any element or not
System.out.println(a1.contains(9)); // Output: false
// ? Print the elements of the arrayList
for (int i = 0; i <= a1.size() - 1; i++) {
System.out.println(a1.get(i));
}
}
}