As you have seen, the mapping of a parameter type is dependent on the IDL type of that parameter as well as the parameter passing mode of that parameter. To know what to expect from the IDL compiler, you should have a good handle on the possible combinations. Click the View Table button below to see an illustration of the mapping from IDL to Java for each primitive type and parameter passing mode. The columns for in and return are the same as are the columns for out and inout.
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In the next lesson, you will learn the mapping for attributes in IDL interfaces.