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Editorial Team
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Asked: 2026-05-29T08:15:12+00:00

I am trying to learn Hibernate and i can’t solve a design problem. I

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I am trying to learn Hibernate and i can’t solve a design problem.
I have Head and Group Classes. I have generated two tables listed below using hibernate. 

Table-Head
id, int4, primary key
name, varchar 50
description, varchar 250

Table-Group 
id, int4, primary key
name, varchar 25
description, varchar 250

I just want to ask how can i generate HeadAndGroup table which is listed below? I have tried to write HeadAndGroup as separate class but i can’t handle it.

Table HeadAndGroup (Many to Many)
id , int4, primary key
head_id , int4, foreign key -> head table
group_id , int4, foreign key -> group table


**head_id, group_id pair will be unique
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1 Answer

  1. Editorial Team

    You can add a Collection<Head> heads in your Group class with @ManyToMany annotation. Hibernate will then handle the HeadAndGroup table for you. 

    @ManyToMany(
    targetEntity=Head.class,
    cascade={CascadeType.PERSIST, CascadeType.MERGE}
)
public Collection getHeads() {
    return heads;
}

    Have a look here for details.

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