abstract class Animal0603 {
    abstract void sound();

    void sleep() {
        System.out.println("Sleeping...");
    }
}

class Dog0603 extends Animal0603 {
    void sound() {
        System.out.println("Bark");
    }
}

public class Task060325 {
    public static void main(String[] args) {
        Animal0603 animal = new Dog0603();
        animal.sound();
        animal.sleep();
    }
}

@Version
private int version;

spring.jpa.hibernate.ddl-auto=update

spring.jpa.properties.hibernate.format_sql=true
Эти настройки не влияют напрямую на @Version, но могут помочь в отладке SQL-запросов, связанных с оптимистичной блокировкой.

@Entity
@Access(AccessType.FIELD)
public class User {
    @Id
    private Long id;

    private String name;
}

@Entity
@Access(AccessType.FIELD)
public class User {
    @Id
    private Long id;

    private String name;

    @Access(AccessType.PROPERTY)
    public String getFullName() {
        return this.name.toUpperCase();
    }

    public void setFullName(String fullName) {
        this.name = fullName.toLowerCase();
    }
}

import java.math.BigDecimal;

public class Task070325 {
    public static void main(String[] args) {
        int a = 5;
        double b = 10.5;
        float c = 3.5f;
        BigDecimal d = new BigDecimal("3.5");
        int e = (int) (a + b + c + d);
        System.out.println(e);
    }
}

@Embedded
@AttributeOverride(name = "street", column = @Column(name = "home_street"))
private Address address;

@Embedded
@AttributeOverrides({
    @AttributeOverride(name = "street", column = @Column(name = "home_street")),
    @AttributeOverride(name = "city", column = @Column(name = "home_city"))
})
private Address address;

@Embeddable
public class Address {
    private String street;
    private String city;
}

@Entity
public class User {
    @Id
    private Long id;

    @Embedded
    @AttributeOverrides({
        @AttributeOverride(name = "street", column = @Column(name = "home_street")),
        @AttributeOverride(name = "city", column = @Column(name = "home_city"))
    })
    private Address homeAddress;

    @Embedded
    @AttributeOverrides({
        @AttributeOverride(name = "street", column = @Column(name = "work_street")),
        @AttributeOverride(name = "city", column = @Column(name = "work_city"))
    })
    private Address workAddress;
}