Components of a Code Basic How To Calling

Components of a Code Basic How To

Calling a Program For the first program you guys created ( the house model ). You guys declared one class called Draw. Square. Inside of this class we setup a method called main. From this main method, the Draw. Square created a Sketch. Pad named paper. We set the size of this paper to something like 300 by 300 [(the measurements for this size is in pixels) and (the size could have been different for each person, meaning that the 300 by 300 is not default, it's just what we used)]

To Start making things We used the Drawing. Tool class and created the object pencil, then preceded to give the pencil a sequence of messages to draw the house.

Comments comments are created by applying two different notations /*This style will allow you to write longer documentation notes as the text can wrap around to succeeding lines. */ // This style automatically ends at the end of the line.

Import packages As simple as learning how to write your name. you type the word “import” in the beginning of the line then add a space and type the name of the file. Immediately after the name of the file add an “*” and end the line with a semicolon.

Class When you use the word class you are marking the beginning of a class declaration.

modifiers the modifiers refers to a sequence of terms designating different kinds of methods.

return_type The return_type refers to the type of data a method returns. You can use this on predefined types or a user-defined type.

Declaration class_name object_name; a. class_name is the name of the class to which these objects belong b. object_name is a sequence of object names separated by commas

Creation An object is not actually created when you declare it. An object is created by using the new operation. object_name = new class_name(arguments); a. object_name is the name of the declared object b. class_name is the name of the class to which the object belongs c. arguments is a sequence of zero or more values passed to the new operation paper = new Sketch. Pad(300, 300);

Message Sending You can only send a message after the object is created. object_name. method_name(arguments); a. object_name is the name of the declared object b. methid_name is the name of a method of the object c. arguments is a sequence of zero or more values passed to the object

Recap The Difference Between Objects and Classes

A class is a template that defines attributes and methods is written by a programmer as a part of a program does not exist when programs execute, except in the form of one or more member objects it’s code cannot be altered during program execution it's named by a class name

object must belong to some class exists during the time that a program executes must be explicitly declared and constructed by the executing program has attributes that can change in values and methods that can execute during program execution is often referenced using a variable name

Assignment 1. Check the website or come see us if you missed a meeting. 2. Continue working on your house if you have not completed it. 3. Build a Benzene model. A Benzene model is an organic compound. Its chemical formula is C 6 H 6.