Basic HTML version of Foils prepared Sept 21 1998

Foil 17 Determining and Testing Class of Object

From Java Tutorial 98- 4: Multi-Treading, Useful Java Classes, I/O and Networking NAVO Tutorial -- Sept 23 1998. by Geoffrey C. Fox, Nancy McCracken
1 Suppose we have an object called obj. We get the class of obj by:
  • Class class = obj.getClass();
2 and its name by:
  • String name = class.getName();
3 One can also use instanceof in following fashion:
  • "foo" instanceof String
4 evaluates to true, but
  • ( new mPoint(x,y) ) instanceof String
5 evaluates to false.
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