Add Author.java

src/main/java/com/ankurm/sdjpa4demo/domain/Author.java

@@ -0,0 +1,32 @@
+package com.ankurm.sdjpa4demo.domain;
+
+import jakarta.persistence.*;
+
+@Entity
+public class Author {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String name;
+
+    // Nullable on purpose: used to demonstrate NULLS FIRST/LAST precedence in Sort.
+    private String country;
+
+    protected Author() { }
+
+    public Author(String name, String country) {
+        this.name = name;
+        this.country = country;
+    }
+
+    public Long getId() { return id; }
+    public String getName() { return name; }
+    public String getCountry() { return country; }
+
+    @Override
+    public String toString() {
+        return "Author{id=" + id + ", name='" + name + "', country=" + country + "}";
+    }
+}