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public class ArrayListExample
{
public static void main(String[] args)
{
ArrayList<String> list = new ArrayList<>(2);
list.add("A");
list.add("B");
list.add("C");
list.add("D");
System.out.println( list.contains("A") ); //true
System.out.println( list.contains("Z") ); //false
}
}