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for (initialization; test; update) { statement(s); } |
public static void name(parameters) { statement(s); } |
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if (test) { statement(s); } else if (test) { statement(s); } else { statement(s); } |
public static type name(parameters) { statement(s);
... return expression; } |
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while (condition) { statement(s); } |
Scanner console = new Scanner(System.in); Random r = new Random(); |
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Math |
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Scanner |
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Method |
Description |
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Method |
Description |
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Math.abs(value) |
absolute value |
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nextInt() |
reads/returns input as int |
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Math.min(v1,
v2) |
smaller of two values |
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nextDouble() |
reads/returns input as double |
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Math.max(v1, v2) |
larger of two values |
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next() |
reads/returns input as String |
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Math.round(value) |
nearest whole number |
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Math.sqrt(value) |
square root |
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Random |
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Math.pow(b, e) |
base to the exponent power |
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Method |
Description |
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nextInt(max) |
random integer from 0 to max-1 |
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String |
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Method |
Description |
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contains(str) |
true if this string contains the other's characters inside it |
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endsWith(str), startsWith(str) |
true if this string starts/ends with the
other's characters |
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equals(str) |
true if this string is the same as str |
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equalsIgnoreCase(str) |
true if this string is the same as str, ignoring capitalization |
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indexOf(str) |
index in this string where given string begins (-1 if
not found) |
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length() |
number of characters in this string |
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substring(i, j) |
characters in this string from index i (inclusive) to j (exclusive) |
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substring(i) |
characters in this string from index i (inclusive) to end |
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toLowerCase(), toUpperCase() |
a new string with all lowercase or uppercase letters |
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charAt(i) |
returns char at index i |