import java.util.List;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.hibernate.annotations.Cascade;


@Entity

@Table(name="student")

public class Student {


@Id
@GeneratedValue

private int id;


@OneToMany(fetch=FetchType.LAZY,cascade=CascadeType.ALL,orphanRemoval=true)
@JoinTable(name = "student_phone", joinColumns = { @JoinColumn(name = "student_id_fk") }, inverseJoinColumns = { @JoinColumn(name = "phone_id_fk") })
private List<Phone> phonenumbers;






public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

@Column(name="sname", length=100,nullable=false)

private String sname;


public String getSname() {

return sname;
}

Student(String sname,List<Phone> phonenumbers)
{
   this.sname=sname;
   this.setPhonenumbers(phonenumbers);
}

public void setSname(String sname) {

this.sname = sname;

}


@Column(name="sroll",nullable=false)

private int sroll;

/**

* @return the sroll

*/

public int getSroll() {

return sroll;

}

/**

* @param sroll the sroll to set

*/

public void setSroll(int sroll) {

this.sroll = sroll;

}

@Column(name="scourse",length=10,nullable=false)

private String scourse;

/**

* @return the scourse

*/

public String getScourse() {

return scourse;

}

/**

* @param scourse the scourse to set

*/

public void setScourse(String scourse) {

this.scourse = scourse;

}

public void setPhonenumbers(List<Phone> phonenumbers) {
   this.phonenumbers = phonenumbers;
}

public List<Phone> getPhonenumbers() {
   return phonenumbers;
}

}

package student;

import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

@Entity
@Table(name = "PHONE")
public class Phone {
   
   
   private long phoneId;
    private String phoneType;
    private String phoneNumber;
   
   
   


    public Phone() {
   }

   public Phone(String phoneType, String phoneNumber) {
       this.phoneType = phoneType;
       this.phoneNumber = phoneNumber;
    }
   
    @Id
    @GeneratedValue
   @Column(name = "PHONE_ID")
   public long getPhoneId() {
       return this.phoneId;
    }

   public void setPhoneId(long phoneId) {
        this.phoneId = phoneId;
    }

   @Column(name = "PHONE_TYPE", nullable = false, length=10)
    public String getPhoneType() {
       return this.phoneType;
    }

    public void setPhoneType(String phoneType) {
        this.phoneType = phoneType;
    }
     
    @Column(name = "PHONE_NUMBER", nullable = false, length=15)
    public String getPhoneNumber() {
        return this.phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

   

   

}

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Hibernate:
    select
        phone0_.phone_id as phone1_1_0_,
        phone0_.phone_number as phone2_1_0_
    from
        phone phone0_
    where
        phone0_.phone_id=?
Record Deleting ...1
Hibernate:
    delete
    from
        phone
    where
        phone_id=?
Exception in thread "main" javax.persistence.RollbackException: Error while committing the transaction
   at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:93)
   at JpaDelete.main(JpaDelete.java:18)
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
   at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1214)
   at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1147)
   at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:81)
   ... 1 more
Caused by: org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
   at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:96)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
   at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:268)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:189)
   at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
   at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)
   at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216)
   at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383)
   at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133)
   at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:76)
   ... 1 more
Caused by: java.sql.BatchUpdateException: Cannot delete or update a parent row: a foreign key constraint fails (`jpacrud`.`student_phone`, CONSTRAINT `FKDD1C4A6AD9D22DA6` FOREIGN KEY (`phone_id_fk`) REFERENCES `phone` (`phone_id`))
   at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:1213)
   at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:912)
   at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70)
   at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268)
   ... 9 more