Connecting netbeans with sql database

I've connected my database to netbeans and it automatically generated some code for me. This is one of the files of code it created.

Code :

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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package stud_info;
 
import java.io.Serializable;
import java.util.Collection;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;
 
/**
 *
 * @author vianna
 */
@Entity
@Table(name = "student")
@XmlRootElement
@NamedQueries({
    @NamedQuery(name = "Student.findAll", query = "SELECT s FROM Student s"),
    @NamedQuery(name = "Student.findByStudId", query = "SELECT s FROM Student s WHERE s.studId = :studId"),
    @NamedQuery(name = "Student.findByLastName", query = "SELECT s FROM Student s WHERE s.lastName = :lastName"),
    @NamedQuery(name = "Student.findByFirstName", query = "SELECT s FROM Student s WHERE s.firstName = :firstName"),
    @NamedQuery(name = "Student.findByGender", query = "SELECT s FROM Student s WHERE s.gender = :gender")})
public class Student implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Basic(optional = false)
    @Column(name = "Stud_Id")
    private Integer studId;
    @Basic(optional = false)
    @Column(name = "LastName")
    private String lastName;
    @Basic(optional = false)
    @Column(name = "FirstName")
    private String firstName;
    @Basic(optional = false)
    @Column(name = "Gender")
    private String gender;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "studId")
    private Collection<Address> addressCollection;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "studId")
    private Collection<AcademicDetails> academicDetailsCollection;
 
    public Student() {
    }
 
    public Student(Integer studId) {
        this.studId = studId;
    }
 
    public Student(Integer studId, String lastName, String firstName, String gender) {
        this.studId = studId;
        this.lastName = lastName;
        this.firstName = firstName;
        this.gender = gender;
    }
 
    public Integer getStudId() {
        return studId;
    }
 
    public void setStudId(Integer studId) {
        this.studId = studId;
    }
 
    public String getLastName() {
        return lastName;
    }
 
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
 
    public String getFirstName() {
        return firstName;
    }
 
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
 
    public String getGender() {
        return gender;
    }
 
    public void setGender(String gender) {
        this.gender = gender;
    }
 
    @XmlTransient
    public Collection<Address> getAddressCollection() {
        return addressCollection;
    }
 
    public void setAddressCollection(Collection<Address> addressCollection) {
        this.addressCollection = addressCollection;
    }
 
    @XmlTransient
    public Collection<AcademicDetails> getAcademicDetailsCollection() {
        return academicDetailsCollection;
    }
 
    public void setAcademicDetailsCollection(Collection<AcademicDetails> academicDetailsCollection) {
        this.academicDetailsCollection = academicDetailsCollection;
    }
 
    @Override
    public int hashCode() {
        int hash = 0;
        hash += (studId != null ? studId.hashCode() : 0);
        return hash;
    }
 
    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Student)) {
            return false;
        }
        Student other = (Student) object;
        if ((this.studId == null && other.studId != null) || (this.studId != null && !this.studId.equals(other.studId))) {
            return false;
        }
        return true;
    }
 
    @Override
    public String toString() {
        return "stud_info.Student[ studId=" + studId + " ]";
    }
 
}

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I want to use the database information to make array objects but I dont know where to go from there so that i can assign variables or even get the results of some of the functions in the automated code. Can someone please explain how I go about doing this please?

Also posted at Connecting netbeans with sql database - Dev Shed