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lec17Feb1108 - Lecture 17 Characters A primitive type...

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Lecture 17 February 11, 08
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Characters A primitive type Single character value – char ch = ‘a’ – char ch = ‘\u039A’
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• boolean isLetter(char ch) – Determines if specified char value is a letter • boolean isDigit(char ch) – Determines if specified char value is a digit • boolean isWhiteSpace(char ch) – Determines if specified char value is white space • boolean isUpperCase(char ch) – Determines if specified char value is uppercase
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• boolean isLowerCase(char ch) • char toUpperCase(char ch) • char toLowerCase(char ch) – Returns the uppercase or lowercase form of the specified char value respectively • toString(char ch) – Returns a String object representing the specified character value
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Strings Consists of a sequence of characters Are objects Provided by Java Platform
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Creating Strings String variableName = stringLiteral e.g. String str = “Hello!”; (Or) Use the new keyword and a constructor The String class provides you with 11 constructors!
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