[appB] More examples records. Also, resurrected the Customer data class (old)... (20895484) · Commits · examples / Head First Java 3rd Edition

src/main/java/appB/Customer.java

+2 −2

Changes for src/main/java/appB/Customer.java: 2 added lines, 2 removed lines.
Original line number	Diff line number	Diff line
		package appB;

		public record Customer(int id, String name) {
		}
		// 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) { }

+12 −3

Changes for src/main/java/appB/CustomerWithValidation.java: 12 added lines, 3 removed lines.
Original line number	Diff line number	Diff line
		package appB;

		import java.util.Objects;

		public record CustomerWithValidation(int id, String name) {
		public CustomerWithValidation {
		if (id < 0) {
		@@ -7,11 +9,18 @@ public record CustomerWithValidation(int id, String name) {
		}
		}

		public int id() {
		return id;
		@Override
		public boolean equals(Object o) {
		return id == ((CustomerWithValidation) o).id;
		}

		private void checkEverythingIsOk() {
		@Override
		public int hashCode() {
		return Objects.hash(id);
		}

		private boolean isValidName(String name) {
		// some implementation
		return true;
		}
		}

+45 −2

Changes for src/main/java/appB/old/Customer.java: 45 added lines, 2 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) { }
		import java.util.Objects;

		public class Customer {
		private final int id;
		private final String name;

		public Customer(int id, String name) {
		this.id = id;
		this.name = name;
		}

		public int getId() {
		return id;
		}

		public String getName() {
		return name;
		}

		@Override
		public boolean equals(Object obj) {
		if (obj == this) {
		return true;
		}
		if (obj == null \|\| obj.getClass() != this.getClass()) {
		return false;
		}
		var that = (Customer) obj;
		return this.id == that.id &&
		Objects.equals(this.name, that.name);
		}

		@Override
		public int hashCode() {
		return Objects.hash(id, name);
		}

		@Override
		public String toString() {
		return "Customer{" +
		"id=" + id +
		", name='" + name + '\'' +
		'}';
		}
		}