Draw a Polygon in Java Applet Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report A polygon is a closed figure with a finite set of line segments joining one vertex to the other. The polygon comprises of set of (x, y) coordinate pairs where each pair is the vertex of the polygon. The side of the polygon is the line drawn between two successive coordinate pairs, and a line segment is drawn from the first pair to the last pair.Note: Java Applets are deprecated since Java 9 and removed in Java 11. Applets are no longer supported in modern browsers or Java versions. For modern applications, use Swing, JavaFX, or Java 2D API. This article is for educational purposes only.Ways to Draw a Polygon in JavaThere are three common ways to draw a polygon in Java applets or Swing components.1. Using drawPolygon(int[] x, int[] y, int numberOfPoints):This method is used to draw a polygon using arrays of x and y coordinates along with the number of vertices.Example: Java import java.awt.*; import javax.swing.*; public class Geeks extends JApplet { // Called when the applet is started public void init() { // Set the size of the applet setSize(200, 200); setVisible(true); } // Draw the polygon on the screen public void paint(Graphics g) { // x coordinates of the vertices int[] x = {10, 30, 40, 50, 110, 140}; // y coordinates of the vertices int[] y = {140, 110, 50, 40, 30, 10}; // Number of vertices int numberOfPoints = 6; // Set the color of the line to blue g.setColor(Color.blue); // Draw the polygon using drawPolygon function g.drawPolygon(x, y, numberOfPoints); } } Output:2. Using drawPolygon(Polygon p)This method draws a polygon with the given object of Polygon class.Example: Java import java.awt.*; import javax.swing.*; public class Geeks extends JApplet { // Called when the applet is started public void init() { // Set the size of the applet setSize(200, 200); setVisible(true); } // Draw the polygon on the screen public void paint(Graphics g) { // x coordinates of the vertices int[] x = {10, 30, 40, 50, 110, 140}; // y coordinates of the vertices int[] y = {140, 110, 50, 40, 30, 10}; // Number of vertices int numberOfPoints = 6; // Create a polygon object with the given x, y coordinates Polygon p = new Polygon(x, y, numberOfPoints); // Set the color of the line to blue g.setColor(Color.blue); // Draw the polygon using the Polygon object g.drawPolygon(p); } } Output:3. Using drawLine(int x, int y, int x1, int y1)This method manually connects each pair of vertices using lines and closes the shape by connecting the last and first points.Example: Java import java.awt.*; import javax.swing.*; public class Geeks extends JApplet { // Called when the applet is started public void init() { // Set the size of the applet setSize(200, 200); setVisible(true); } // Draw the polygon on the screen public void paint(Graphics g) { // x coordinates of the vertices int[] x = {10, 30, 40, 50, 110, 140}; // y coordinates of the vertices int[] y = {140, 110, 50, 40, 30, 10}; // Number of vertices int numberOfPoints = 6; // Set the color of the line to blue g.setColor(Color.blue); // Draw lines between adjacent vertices for (int i = 0; i < numberOfPoints - 1; i++) { g.drawLine(x[i], y[i], x[i + 1], y[i + 1]); } // Connect the first and last vertex g.drawLine(x[0], y[0], x[numberOfPoints - 1], y[numberOfPoints - 1]); } } Output: Comment More infoAdvertise with us A andrew1234 Follow Improve Article Tags : Java Programming Language java-swing java-applet Practice Tags : Java Similar Reads Java Tutorial Java is a high-level, object-oriented programming language used to build web apps, mobile applications, and enterprise software systems. 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