Graphics in Java Applets

Graphics class in Applets helps us to draw different shapes in Applets,for drawing these shapes each shape has its own method.These methods are as follows:

Most Common Graphic class methods:

• drawString(String Str,int x,int y): This method is used to draw the required String.
• drawOval(int x,int y,int width,int height): It is used to draw Oval of the specified width and the height.
• drawRect(int x,int y,int width,int height): It is used to draw Rectangle of the specified height and width.
• drawLine(int x1,int y1,int x2,int y2): It is used to draw line between the points(x1,y1) and (x2,y2).
• drawArc(int x,int y,int width,int height,int start angle,int arc angle ): It is used to draw an arc of the specified angle.
• drawImage(Image img,int x,int y,Image observer): It is used to draw an Image of the specified parameters.
• fillOval(int x,int y,int width,int height): It is used to fill the Oval with specified Color and the parameters specified.
• fillRect(int x,int y,int width,int height): It is used to fill the Rectangle with specified Color and the parameters specified.
• fillArc(int x,int y,int width,int height): It is used to fill the Arc with specified Color and the parameters specified.
• setColor(Color c): This method is used to set the Color specified by the User.
• setFont(Font font): This method is used to set the Font type and size according to the specified parameters.

Now,to implement these functions,we had created a simple program which will not use these functions fully,but will cover most of them.

WAP to implement the use of Graphics class in Java Applets:

import java.awt.*;
import java.applet.*;
public class Applet3 extends Applet
{
Thread t;                                                                                           //Thread is declared
AudioClip soundFile1;

public void start()
{
soundFile1 = getAudioClip (getCodeBase()," 123.wav ");                 //Audio file

soundFile1.loop();


soundFile1.play();

}
public void paint(Graphics g)
{
g.setFont(new Font("VERDANA",2,50));
g.drawString("Keep Smiling!!!",50,50);
g.setColor(Color.yellow);
g.fillOval(70,200,230,230);
g.setColor(Color.black);
try

{
g.drawOval(170,320,55,55);
for(int i=0;i<30;i+=2)
{
g.setColor(Color.black);
g.drawOval(110,250,30,i);
g.drawOval(210,250,30,i);
t.sleep(50);
g.setColor(Color.yellow);
}
g.setColor(Color.black);
g.drawOval(110,250,30,30);

g.drawOval(210,250,30,30);

g.drawArc(100,230,50,50,0,180);//main arc
g.drawArc(101,231,50,50,0,180);
g.drawArc(102,232,50,50,0,180);
g.drawArc(200,230,50,50,0,180);//main arc
g.drawArc(201,231,50,50,0,180);
g.drawArc(202,232,50,50,0,180);

g.fillOval(110,250,30,30);
g.fillOval(210,250,30,30);
}
catch(InterruptedException e)
{
}
}
}

This is the output of our program:

Here is the Applet design:

Note: We had also used Audio file in our Applet,using Audio in Applet will be discussed in later posts.You just need to see the Graphic methods used.