Java Quick Reference Console Input Scanner input = new Scanner(System.in); int intValue = input.nextInt(); long longValue = input.nextLong(); double doubleValue = input.nextDouble(); float floatValue = input.nextFloat(); String string = input.next(); Console Output System.out.println(anyValue); JOptionPane.showMessageDialog(null, "Enter input"); GUI Input Dialog String string = JOptionPane.showInputDialog( "Enter input"); int intValue = Integer.parseInt(string); double doubleValue = Double.parseDouble(string); Message Dialog

Primitive Data Types byte short int long float double char boolean 8 bits 16 bits 32 bits 64 bits 32 bits 64 bits 16 bits true/false

Arithmetic Operators + * / % ++var --var var++ var-addition subtraction multiplication division remainder preincrement predecrement postincrement postdecrement

Assignment Operators = += -= *= /= %= assignment addition assignment subtraction assignment multiplication assignment division assignment remainder assignment

Relational Operators < >= == != less than less than or equal to greater than greater than or equal to equal to not equal

Logical Operators && || ! ^ short circuit AND short circuit OR NOT exclusive OR

if Statements if (condition) { statements; } if (condition) { statements; } else { statements; } if (condition1) { statements; } else if (condition2) { statements; } else { statements; }

switch Statements switch (intExpression) { case value1: statements; break; ... case valuen: statements; break; default: statements; }

loop Statements while (condition) { statements; } do { statements; } while (condition); for (init; condition; adjustment) { statements; }

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Java Quick Reference Frequently Used Static Constants/Methods Math.PI Math.random() Math.pow(a, b) System.currentTimeMillis() System.out.println(anyValue)