Pattern Matching

int j = switch (day) {
  case MONDAY, null -> 0;
  case TUESDAY -> 1;
  default -> {
    int k = day.toString().length();
    yield k;
  }
};

record Range(List<Integer> values) {
  Range { Objects.requirenNonNull(values); }

  Range(List<Integer> values) {
    this.values = List.copyOf(values);
  }

  Range(Integer i1, Integer i2) {
    this(List.of(i1,i2));
  }

  int length() { return values.length(); }
}

sealed interface Shape permits Circular, Cornered { }

non-sealed class Circular implements Shape {}

sealed class Cornered implements Shape {
    final class Rectangle implements Cornered {}
  record Square(int h) implements Cornered {}
}

if (o instanceof Triangle t) {
    System.out.println("Area: " + t.calculateArea());
} else if (!(o instanceof String str)) {
    System.out.println("Not Triangle or String ");
} else {
    System.out.println("String value is:" + str);
}

switch (s) {
  case Triangle t when t.calculateArea() > 100 ->
    System.out.println("Large");
  case Triangle t -> System.out.println("Small");
  default -> System.out.println("Non-triangle");
}

record Point<T>(T x, T y) {}

static <T> void print(Object o) {
  if (o instanceof Point(T x, T y)) {
    System.out.println(x + "+" + y);
  }
}