public class Main {
  public static void main(String[] args) {
    int age = 25;
    boolean hasTicket = true;

    boolean canEnter = age >= 18 && hasTicket; // both must hold
    boolean needsHelp = age < 12 || age > 65;  // either qualifies
    boolean noTicket = !hasTicket;             // flips true to false

    System.out.println(canEnter); // true
    System.out.println(needsHelp); // false
    System.out.println(noTicket);  // false
  }
}