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Related Flashcards
Cards In This Set
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Program necessities
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Public class something { public static void main(string[] args) {}}
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Print out a string on page
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System.out.println("something");system.out.print("something");
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Declaring and initializing a variable
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type name = expression;first letter must be lower cased
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Types of expressions
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Literal= 0, 0.1, true, 'a'; int, double, charvariable= expressionoperation= expression operation expressionsome method calls= methodName(information)constant= something
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Finding the remainder
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int % int
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Using classes from a package
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Import package.classname; or import package.*; -a package is a collection of classes with a related purpose-must be at top of source code
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Reading input
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Import java.util.Scanner;...Scanner in = new Scanner(System.in)
System.out.println("Prompt to User")... in.nextlnt().... System.out.println("Prompt to User")...in.nextDouble()... |
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In/decreasing variables by 1
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++--
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Adding comments for programmer
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// comment/*blockcomment*/
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Declaring a constant
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Final type NAME = expression;
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Math class
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Import java.lang.math;Math.squrt(number);Math.pow(number, power);Math.abs(number);-and many more on api
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Casting
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(type) expression-changes expression into the type described
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String Variables
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String name = StringExpression;name = StringExpression;
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String and char literals
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String literal"text"char literal'char'-char is one character
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String concatenation
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StringExpressionA + StringExpressionB goes toStringExpressionAStringExpressionB
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