Workaround for Project Lombok's builders with inheritance issue.

Child.java

import lombok.Builder;
import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
public class Child extends Parent {

    private String childField_1;

    private String childField_2;

    @Builder
    private Child(String childField_1, String childField_2, String parentField_1, String parentField_2) {
        super(parentField_1, parentField_2);
        this.childField_1 = childField_1;
        this.childField_2 = childField_2;
    }

}

LombokTest.java

import org.junit.Test;

import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;

public class LombokTest {

    @Test
    public void shouldBuilderWorksForInheritance() {
        Child childInstance = Child.builder()
                .childField_1("c1")
                .parentField_1("p1")
                .childField_2("c2")
                .parentField_2("p2")
                .build();

        assertThat(childInstance.getChildField_1(), equalTo("c1"));
        assertThat(childInstance.getChildField_2(), equalTo("c2"));
        assertThat(childInstance.getParentField_1(), equalTo("p1"));
        assertThat(childInstance.getParentField_2(), equalTo("p2"));
    }

}

Parent.java

import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
@AllArgsConstructor
public class Parent {

    private String parentField_1;

    private String parentField_2;

}