[appB] Example of records validation (099a1ad5) · Commits · examples / Head First Java 3rd Edition

src/main/java/appB/CustomerWithValidation.java

0 → 100644

+20 −0

Changes for src/main/java/appB/CustomerWithValidation.java: 20 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		package appB;

		public record CustomerWithValidation(int id, String name) {
		public CustomerWithValidation(int id, String name) {
		if (id < 0) {
		throw new ValidationException();
		}
		this.id = id;
		this.name = name;
		}

		public int id() {
		checkEverythingIsOk();
		return id;
		}

		private void checkEverythingIsOk() {

		}
		}

+3 −1

Changes for src/main/java/appB/UsingRecords.java: 3 added lines, 1 removed line.
Original line number	Diff line number	Diff line
		@@ -7,8 +7,10 @@ public class UsingRecords {

		static void usingARecordLooksJustLikeANormalClass() {
		Customer customer = new Customer(7, "Trisha");
		System.out.println("customer = " + customer);
		System.out.println(customer);
		System.out.println(customer.name());

		System.out.println("customer = " + customer);
		System.out.println("customer.name() = " + customer.name());
		}
		}

0 → 100644

+4 −0

Changes for src/main/java/appB/ValidationException.java: 4 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		package appB;

		public class ValidationException extends IllegalArgumentException {
		}

+1 −0

Changes for src/main/java/appB/old/Customer.java: 1 added line, 0 removed lines.
Original line number	Diff line number	Diff line
		package appB.old;

		// This requires at least Java 16. Recommend using Java 17, as it's the current Long Term Support release.
		public record Customer(int id, String name) { }