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Draw a ellipse and a rectangle in Java Applet
• Difficulty Level : Hard
• Last Updated : 06 Jun, 2018

Java applets are application that can be executed in web browsers or applet viewers . We can draw shapes on the Java applet.
In this article we will draw a ellipse on Java applet by two ways . By using the drawOval(int x, int y, int width, int height) or by using mathematical formula (X= A * sin a, Y= B *cos a, where A and B are major and minor axes and a is the angle ) .
Similarly, we will draw a rectangle on Java applet by two ways . By using the drawRect(int x, int y, int width, int height) or by drawing four lines joining the edges .

To draw a ellipse in Java Applet
Examples:
Let us draw a oval with width 150 and height 100

```Input : x and y coordinates 100, 100 respectively
Width and height 150 and 100 respectively
```

Output : To draw a rectangle in Java Applet
Examples:
We will draw a rectangle of height 200 and width 200 and
At a position 100,100 on the applet.

```Input : x and y coordinates 100, 100 respectively
Width and height 200 and 200 respectively.
```

Output : 1. Java Program to draw a ellipse using drawOval(int x, int y, int width, int height)

 `// java program to draw a ellipse``// using drawOval function.``import` `java.awt.*;``import` `javax.swing.*;`` ` `public` `class` `ellipse ``extends` `JApplet {`` ` `    ``public` `void` `init()``    ``{``        ``// set size``        ``setSize(``400``, ``400``);`` ` `        ``repaint();``    ``}`` ` `    ``// paint the applet``    ``public` `void` `paint(Graphics g)``    ``{``        ``// set Color for rectangle``        ``g.setColor(Color.red);`` ` `        ``// draw a ellipse``        ``g.drawOval(``100``, ``100``, ``150``, ``100``);``    ``}``}`

Output : 2. program to draw a ellipse using drawLine function

 `// java program to draw a ellipse``// using drawLine function``import` `java.awt.*;``import` `javax.swing.*;`` ` `public` `class` `ellipse ``extends` `JApplet {`` ` `    ``public` `void` `init()``    ``{``        ``setSize(``300``, ``300``);``    ``}`` ` `    ``public` `void` `paint(Graphics g)``    ``{``        ``// center of the``        ``int` `cx, cy;`` ` `        ``// center of th ellipse``        ``cx = ``150``;``        ``cy = ``175``;`` ` `        ``// major and minor axis``        ``double` `A = ``75``, B = ``50``, px = ``0``, py = ``0``;`` ` `        ``// set color``        ``g.setColor(Color.red);`` ` `        ``// draw the ellipse``        ``for` `(``int` `i = ``0``; i <= ``360``; i++) {``            ``double` `x, y;``            ``x = A * Math.sin(Math.toRadians(i));``            ``y = B * Math.cos(Math.toRadians(i));`` ` `            ``if` `(i != ``0``) {``                ``// draw a line joining previous and new point .``                ``g.drawLine((``int``)px + cx, (``int``)py + cy,``                                ``(``int``)x + cx, (``int``)y + cy);``            ``}`` ` `            ``// store the previous points``            ``px = x;``            ``py = y;``        ``}``    ``}``}`

Output : Now we will see how to draw a rectangle in a Java Applet

We can draw rectangle in java applet by two ways.
1. Draw a rectangle using drawRect(int x, int y, int width, int height)

 `// Java Program to  Draw a rectangle``// using drawRect(int x, int y, int width, int height)``import` `java.awt.*;``import` `javax.swing.*;`` ` `public` `class` `rectangle ``extends` `JApplet {`` ` `    ``public` `void` `init()``    ``{``        ``// set size``        ``setSize(``400``, ``400``);`` ` `        ``repaint();``    ``}`` ` `    ``// paint the applet``    ``public` `void` `paint(Graphics g)``    ``{``        ``// set Color for rectangle``        ``g.setColor(Color.red);`` ` `        ``// draw a rectangle``        ``g.drawRect(``100``, ``100``, ``200``, ``200``);``    ``}``}`

Output: 2. Draw a rectangle using drawLine(int x, int y, int x1, int y1)

 `// Java Program  Draw a rectangle``// using drawLine(int x, int y, int x1, int y1)``import` `java.awt.*;``import` `javax.swing.*;`` ` `public` `class` `rectangle ``extends` `JApplet {`` ` `    ``public` `void` `init()``    ``{``        ``// set size``        ``setSize(``400``, ``400``);`` ` `        ``repaint();``    ``}`` ` `    ``// paint the applet``    ``public` `void` `paint(Graphics g)``    ``{``        ``// set Color for rectangle``        ``g.setColor(Color.red);`` ` `        ``// draw a rectangle by drawing four lines``        ``g.drawLine(``100``, ``100``, ``100``, ``300``);``        ``g.drawLine(``100``, ``300``, ``300``, ``300``);``        ``g.drawLine(``300``, ``300``, ``300``, ``100``);``        ``g.drawLine(``300``, ``100``, ``100``, ``100``);``    ``}``}`

Output : Note : the following programs might not run in an online compiler please use an offline IDE.

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