16.12. Using parameters

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<div class="title">Example 420. Parameters example</div>
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<pre class="prettyprint highlight">`CriteriaBuilder builder = entityManager.getCriteriaBuilder();

CriteriaQuery&lt;Person&gt; criteria = builder.createQuery( Person.class );
Root&lt;Person&gt; root = criteria.from( Person.class );

ParameterExpression&lt;String&gt; nickNameParameter = builder.parameter( String.class );
criteria.where( builder.equal( root.get( Person_.nickName ), nickNameParameter ) );

TypedQuery&lt;Person&gt; query = entityManager.createQuery( criteria );
query.setParameter( nickNameParameter, "JD" );
List&lt;Person&gt; persons = query.getResultList();`</pre>
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Use the parameter method of `javax.persistence.criteria.CriteriaBuilder` to obtain a parameter reference.
Then use the parameter reference to bind the parameter value to the `javax.persistence.Query`.

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