10-string-methods - Strings and Things CSE 114(Computer...

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Strings and Things CSE 114 (Computer Science I) SUNY at Stony Brook 1
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Strings Are Fundamental! The String class is probably the most commonly used class in Java programming Let’s take a quick look at the methods provided by the String class... 2
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String Methods String() — creates a new String ex. String s = new String(“Hello!”); Shorthand: String s = “Hello!”; length() — returns the total number of characters in the String trim() — returns a new String with no leading or trailing whitespace 3
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String Methods charAt() — returns the character at a given index Indices range from 0 to (length - 1) indexOf( str ) — returns the first index at which str occurs in the string (or -1 if it isn’t there) toLowerCase() / toUpperCase() — return a new copy of the string in lower/ uppercase The original string is unchanged; Java strings are immutable 4
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Objects vs. Primitives Remember the difference between primitive (built-in) types and objects:
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