sample jpa annotations

Scratch.java

import javax.persistence.*;

@Entity
class Scratch {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    String a;

    @ManyToOne(fetch = FetchType.LAZY, cascade = {CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH})
    @JoinColumn(name = "column_name")
    String b;

    @ManyToMany
    @JoinTable(name = "table_name",
            joinColumns = {@JoinColumn(name = "column_name")},
            inverseJoinColumns = {@JoinColumn(name = "inverse_column_name")})
    String c;

    @OneToMany(orphanRemoval = true, cascade = {CascadeType.ALL})
    @JoinColumn(name = "column_name")
    String d;

    @OneToMany(mappedBy = "property_name", cascade = {CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH})
    String e;
}