You can evaluate expressions in the expressions window. Expressions may include program variables or Java operators, but not method calls.
There are two ways to enter expressions in this window. Menu command Data|
[0]Copy to Expression copies any selected expression from the program window to the expressions window. To enter
a new expression select Data|
[0]New Expression,
type the expression and press Return.
To modify an expression, double-click it and make the desired changes. Hit Return to display its value.