Java: What are static fields and methods in Records?

1public record Person(String name, int age) {
2    public static final int MAX_AGE = 150;
3    private static int count = 0;
4
5    public Person {
6        count++;
7    }
8
9    public static int getCount() {
10        return count;
11    }
12}

1public record Person(String name, int age) {
2    public static Person of(String name, int age) {
3        return new Person(name, age);
4    }
5    public static Person unknown() {
6        return new Person("Unknown", 0);
7    }
8}

1public record Person(String name, int age) {
2    public boolean isAdult() {
3        return age >= 18;
4    }
5
6    @Override
7    public String toString() {
8        return name + " (" + age + ")";
9    }
10}

1public record Money(java.math.BigDecimal amount, String currency) {
2    private static final java.util.Set<String> VALID_CURRENCIES =
3        java.util.Set.of("USD", "EUR", "GBP", "JPY");
4
5    public Money {
6        if (amount == null || amount.signum() < 0) {
7            throw new IllegalArgumentException("Amount must be non-negative");
8        }
9        if (!VALID_CURRENCIES.contains(currency)) {
10            throw new IllegalArgumentException("Invalid currency: " + currency);
11        }
12    }
13
14    public static Money usd(java.math.BigDecimal amount) {
15        return new Money(amount, "USD");
16    }
17
18    public static Money eur(java.math.BigDecimal amount) {
19        return new Money(amount, "EUR");
20    }
21}