CMSC433, Spring 2001 Programming Language Technology and Paradigms …

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Basic Java, continued. Alan Sussman. October 9, 2001. CMCS 433, Fall 2001 - Alan Sussman. 2. Administrivia. . Midterm Thursday …

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CMSC 433, Alan Sussman, U. Maryland
(via Bill Pugh) 1
CMSC433, Spring 2001
Programming Language
Technology and Paradigms
Basic Java, continued
Alan Sussman
October 9, 2001
CMCS 433, Fall 2001 - Alan Sussman 2
Administrivia
?Midterm Thursday
- on everything covered up through today
?Project 2 questions?
- problems with parsing arguments?
?Project 1 commentary due tomorrow (10/10) at
6PM
- submit with submit 11 1.txt 2.txt
- final drivers used for grading posted
?Project 2 out for commentary soon
- due 10/24
?Project 3 out by tomorrow - threads
- due dates will change!
CMCS 433, Fall 2001 - Alan Sussman 3
Last time - Java
?I/O
- usually best to turn everything into PrintWriter for
output and BufferedReader for input
?Packages
- like C++ namespaces
- use import to allow short names
?Wrapper classes allow using primitive types as
classes, and provide utility functions
?Exceptions
- just classes with special semantics
- methods must declare all exceptions they might throw
- all exceptions eventually get caught
CMCS 433, Fall 2001 - Alan Sussman 4
Inner Classes
?Allow a class to be…