Java-graphic programming

I. Create a framework

frame, No window with other windows

Swing based on awt, the first step in creating a framework requires the import of swing and AWT packages

Importjava.awt.*;Importjavax.swing.*; Swing in the Java expansion pack/*** File Name: Simpleframetest.java
* Function: understand the framework to build the deploymentSteps
* 1. Define subclass simpleframe, The size of the constructor is set to 300 * 200 pixels
* 2. Create a Simpleframe object in the main method in Simpleframetest frame
* 3. Defines the response action when the user closes the frame, which is hidden by default, not closed
* 4. Show frame, default not displayed*/ public classsimpleframetest{ public Static voidmain (string[] Args) {eventqueue.invokelater (NewRunnable () { public voidRun () {simpleframe frame=NewSimpleframe ();               Frame.setdefaultcloseoperation (jframe.exit_on_close); Frame.setvisible (true);   }         }); }}classSimpleframeextendsjframe{Private Static Final intDefault_width = 300; Private Static Final intDefault_height = 200;  publicsimpleframe () {setSize (default_width, default_height); }}

second, Frame Size

Importjava.awt.*;Importjavax.swing.*;/*** File Name: Sizedframetest.java* Features: Added frame properties, add title
*
* */ public classsizedframetest{ public Static voidmain (string[] Args) {eventqueue.invokelater (NewRunnable () { public voidRun () {JFrame frame=NewSizedframe (); Frame.settitle ("sizedframe");               Set frame title name Frame.setdefaultcloseoperation (jframe.exit_on_close); Frame.setvisible (true);   }         }); }}classSizedframeextendsjframe{ publicSizedframe () {
//Get frame size
Steps:
1. Call the static method of the Toolkit class Getdefaulttookit get a Tookit object
2. This method returns the screen size in dimension mode
3. Dimension saving screen width and height with public variable width and hightToolkit Kit=Toolkit.getdefaulttoolkit (); Dimension screensize=kit.getscreensize (); intScreenHeight =screensize.height; intScreenWidth =screensize.width; //Set the screen to half with the size set in frame properties
Let the system position the framesetSize (screenwidth/2, SCREENHEIGHT/2); Setlocationbyplatform (true); //Set frame icon 　　　　 Image img=NewImageIcon ("icon.gif"). getImage ();         Seticonimage (img); }}

Iii. displaying information in Components

Importjavax.swing.*;Importjava.awt.*;/*** File name: Nothelloworld * function: Display information in component * Step: * 1. */ public classnothelloworld{ public Static voidmain (string[] Args) {eventqueue.invokelater (NewRunnable () { public voidRun () {JFrame frame=NewNothelloworldframe (); Frame.settitle ("nothelloworld");               Frame.setdefaultcloseoperation (jframe.exit_on_close); Frame.setvisible (true);   }         }); }}/*** Create a new panel in the constructor and add it to the frame*/classNothelloworldframeextendsjframe{ publicnothelloworldframe () {add (Newnothelloworldcomponent ());   Pack (); }}/*** Graphics brushes inherit from Jcompoent and can also inherit from JPanel*/classNothelloworldcomponentextendsjcomponent{ public Static Final intmessage_x = 75;  public Static Final intmessage_y = 100; Private Static Final intDefault_width = 300; Private Static Final intDefault_height = 200;  public voidpaintcomponent (Graphics g) {g.drawstring ("not a Hello, the world program", message_x, message_y); }       publicDimension getpreferredsize () {return NewDimension (default_width, default_height); }}    

Iv. painting a tank with a paintbrush

Importjavax.swing.*;Importjava.awt.*;/*** Function: draw out tank * Step * 1. Create tank class Tank * 2. Create my tank class hero inherit Tank * 3. Create my panel mypanel inherit JPanel * 4. In the TankGame1 class, add Add Mypanel **/ public classTankGame1extendsjframe{//Create a Panel object MPMypanel MP =NULL;  public Static voidmain (string[] Args) {TankGame1 mtg=NewTankGame1 (); }        //constructor Function     publicTankGame1 () {mp=NewMypanel ();  this. Add (mp);//add into the panel         this. setSize (400, 300);//size             this. Setdefaultcloseoperation (jframe.exit_on_close);  this. setvisible (true);//Show    }    }//my panelclassMypanelextendsjpanel{//define a tank of mineHero Hero =NULL; //constructor Function     publicMypanel () {hero=NewHero (100,100); }        //Re-Paint     public voidpaint (Graphics G) {Super. Paint (g); //Set the Active AreaG.fillrect (0, 0, 400, 300); //Call function Drawtank draw out my tank.         this. Drawtank (hero.getx (), hero.gety (), g, 0, 1); }        //draw the function of a tank     public voidDrawtank (intXinty, Graphics g,intDirectintType) {                //judging what type of tank        Switch(type) { case0: G.setcolor (color.cyan);  break;  case1: G.setcolor (color.yellow); }                //Judging Direction        Switch(direct) {//Upward         case0:            //draw out my tank.//1. Draw the left rectangleG.fill3drect (x, y, 5, 30,false); //2. Reveal the right rectangleG.fill3drect (x+15, y, 5, 30,false); //3. Draw the middle rectangleG.fill3drect (x+5, y+5, 10, 20,false); //4. Draw a circleG.filloval (x+5, y+10, 10, 10); //5. Draw the outletG.drawline (x+10, y+15, x+10, y); }    }}//Tank Classclasstank{intx = 0;//indicates the horizontal axis of the tank    inty = 0;//indicates the ordinate of the tankTank (intXintY) { this. x =x;  this. y =y; }         public intGetX () {returnx; }     public voidSetX (intX) { this. x =x; }     public intGetY () {returny; }     public voidSety (intY) { this. y =y; }    }//my Tank.classHeroextendstank{ publicHero (intXintY) {Super(x, y); }}

Java-graphic programming