MATHEMATICAL FUNCTIONS, CHARACTERS, AND STRINGS - Introduction to Java Programming: Comprehensive Version - page 119

CHAPTER

4

M ATHEMATICAL

F UNCTIONS ,

C HARACTERS ,

AND S TRINGS

Objectives

To solve mathematical problems by using the methods in the Math class (§4.2).

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To represent characters using the char type (§4.3).

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To encode characters using ASCII and Unicode (§4.3.1).

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To represent special characters using the escape sequences (§4.4.2).

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To cast a numeric value to a character and cast a character to an integer (§4.3.3).

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To compare and test characters using the static methods in the Character
class (§4.3.4).

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To introduce objects and instance methods ( § 4.4).

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To represent strings using the String object (§4.4).

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To return the string length using the length() method (§4.4.1).

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To return a character in the string using the charAt(i) method (§4.4.2).

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To use the + operator to concatenate strings (§4.4.3).

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To return an uppercase string or a lowercase string and to trim a string (§4.4.4).

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To read strings from the console (§4.4.5).

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To read a character from the console (§4.4.6).

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To compare strings using the equals method and the compareTo methods
(§4.4.7).

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To obtain substrings (§4.4.8).

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To find a character or a substring in a string using the indexOf method (§4.4.9).

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To program using characters and strings ( GuessBirthday ) (§4.5.1).

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To convert a hexadecimal character to a decimal value ( HexDigit2Dec )
(§4.5.2).

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To revise the lottery program using strings ( LotteryUsingStrings ) (§4.5.3). ■

To format output using the System.out.printf method (§4.6). ■