JET Expressions Syntax Reference
JET Templates may emit the result of a Java expression by
enclosing the Java expression between the characers
<%= and %>.
Valid Expressions
Expressions contain valid Java expressions. Java expressions are
not complete statements, and in particular, they do not include a
semi-colon (;). Expressions may access any Java element inscope
Java elemement, including fields and methods declared in
Java declarations, or in
Java scriptlets, or
Implicit Java Objects.
The emitted Java code for the template will evaluate the Java
expression and convert the result to a string (if necessary). The
following are examples of Java expressions:
The name of the class executing is: <%= this.getClass().getName() %>
Although slightly silly, expression may be constant, like <%= 5 %> and <%= "hello" %>.
Invalid Expressions
Any syntax error in the Java expression will result errors in
the emitted Java code. The JET compiler does not attempt to
correlate the Java compile error back to the JET template. Some
examples:
<%= 3 + 4; %> <%-- semicolon not allowed in Java expressions --%>
Escaping Expression characters
To emit the characters <%= in a templates
output, enter <\%=. To emit %>,
enter %\>
