have pojo class A and B
public class A {
@Id
@GeneratedValue
private Integer id;
private String name;

public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

@ManyToMany(cascade={CascadeType.MERGE,CascadeType.PERSIST}
)
@JoinTable(name="a_b",
joinColumns={@JoinColumn(name="a_id")},
inverseJoinColumns={@JoinColumn(name="b_id")}
)
private List<B> bs;

public List<B> getBs() {
return bs;
}

public void setBs(List<B> bs) {
this.bs = bs;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

}


@Entity
@Table(name="a")
@Entity
@Table(name = "b")
public class B {
@Id
@GeneratedValue
private Integer id;
private String name;

@ManyToMany(cascade = { CascadeType.PERSIST, CascadeType.MERGE }, mappedBy = "bs", targetEntity = A.class)
private List<A> as;

public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

public List<A> getAs() {
return as;
}

public void setAs(List<A> as) {
this.as = as;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

}

the problem is I can use
a.getBs();
but I can't use
b1.getAs();