[ JDK VERSION : 1.5.0_06 ]

Suppose following table:

create table Issue (
  IssueNo integer not null primary key,
  Subject varchar(100),
  Description varchar(4000),
  Reporter integer not null constraint fk_reporter referentes User (UserId),
  LastUpdateBy integer null constraint fk_lastUpdateBy references User (UserId)
)

Actually, perssitence from db generates fields

private Users users;
private Users users1;

for last two fields of the table. Better names is

private Users reporter;
private Users lastUpdateBy;

(using column name as name of the field, not the referenced table).