Draw a ellipse and a rectangle in Java Applet
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 functionimport 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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