201671010131 2016-2017-2 "Java Programming"

This week, I learned graphic programming.

The basic content is: simple graphics frame construction.

Eventqueue.invokelater (()
{
Simpleframe frame = new Simpleframe ();

Frame.settitle ();
Frame.setdefaultcloseoperation (Jframe.exit_on_close);
Frame.setvisible (TRUE);
});

private static String message;

public static String GetMessage () {
return message;
}
Public Simpleframe ()
{
SetSize (Default_width, default_height);
}

Writing of graphical cues: Fra.settitle ("welcome!"); /Window Prompt

Frame positioning:

Set frame width, height and let platform pick

SetSize (SCREENWIDTH/2, SCREENHEIGHT/2);//long, wide, half the screen,
Setlocationbyplatform (TRUE);//determines where the frame is placed.

To display information in the component:

public void Paintcomponent (Graphics g)//Describes methods for drawing components.
{
graphics2d g2 = (graphics2d) g;

Draw a rectangle

Double LEFTX = 100;
Double topy = 100;
Double width = 200;
Double height = 150;.. }

There is also the construction of the graphics in the component:

Public Drawframe ()
{
Add (New Drawcomponent ());//Adds a given component to the contents pane, which is titled Rectangle.
Pack ();//Adjust window size.
}

Rectangle2D rect = new Rectangle2d.double (LEFTX, topy, width, height);
G2.draw (rect);

G2.draw (New Line2d.double (LEFTX, topy, Leftx + width, topy + height);//. The position and height of the upper left corner.

Multiple windows can be generated, but not multi-layered.

201671010131 2016-2017-2 "Java Programming"