Programming Kotlin

Creating an Entity Class

Seeing the H2 library in the classpath, Spring has already configured the database. We need to define an entity class that represents data that will be stored in a table in the database.

Again, if we were using Java, we’d write the Task entity class like so:

//Java code only for comparison purpose
package com.agiledeveloper.todo;

import javax.persistence.*;

@Entity
public class Task {
  @Id @GeneratedValue private Long id;
  private String description;

  public Long getId() { return id; }

  public String getDescription() { return description; }
}

Instead, we’ll write that code using Kotlin. Create a new file todo/src/main/kotlin/com/agiledeveloper/todo/Task.kt and add the following ...