100. Using generic records in record patterns

Declaring a generic record for mapping fruit data can be done as follows:

public record FruitRecord<T>(T t, String country) {}

Now, let’s assume a MelonRecord, which is a fruit (actually, there is some controversy over whether a melon is a fruit or a vegetable, but let’s say that it is a fruit):

public record MelonRecord(String type, float weight) {}

We can declare a FruitRecord<MelonRecord> as follows:

FruitRecord<MelonRecord> fruit = 
  new FruitRecord<>(new MelonRecord("Hami", 1000), "China");

This FruitRecord<MelonRecord> can be used in record patterns with instanceof:

if (fruit instanceof FruitRecord<MelonRecord>(
    MelonRecord melon, String country)) {
  System.out.println(melon + " from " + country);
} 

Or, in switch statements/expressions:

switch(fruit) {
  case FruitRecord<MelonRecord>(
       MelonRecord...