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My Intro to Object-Oriented Programming
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Class Notes
Monday November 6 , 2000
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Tonight we were introduced to some
String Processing
through a specification (very partial) of java.lang.String class.
1)
< String > .length ()
-- >
< int >
2)
< String > .indexOf (< String >)
-- >
< int >
- the < int > result of: ``frim fram sauce''.indexOf (``fr'') would be 0
- the < int > result of: ``frim fram sauce''.indexOf (``fra'') would be 5
3 a)
< String > .substring (< int >)
-- >
< String >
- returns the substring from the position specified by the parameter to the end of the string. Example: result of ``Monday''.substring (3) would be ``day''
3 b)
< String > .substring (< int >, < int >)
-- >
< String >
- returns the substring from the position specified by the parameter to the position one less than the second parameter. Example: result of ``tired hand''.substring (2, 7) would be ``red h''
4)
< String > .equals (< String >)
-- >
< boolean >
- ``cat''.equals (``dog'') - > false
- ``cat''.equals (``cat'') - > true
- ``cat''.equals (``Cat'') - > false
5)
< String > .equalsIgnoreCase (< String >)
6)
< String > .compareTo (< String >)
-- >
< int > returns....
- 0 if the two strings are equal
- something negative if the receiving is alphabetically less than the parameter
- something positive if the receiving is alphabetically greater than the parameter
- Example: ``cat''.compareTo (``bat'') - > greater than
- Example: ``bat''.compareTo (``bats'') - > something negative
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