This is an example of Java swing; here we are going to print a wave form. To implement this program, we are using two packages and its classes, objects: java.awt.* and javax.swing.*
import java.awt.*; import javax.swing.*; public class WavePrint extends JPanel { int SCALEFACTOR = 200; int cycles; int points; double[] sines; int[] pts; public void setCycles(int cycles) { this.cycles = cycles; this.points = SCALEFACTOR * cycles * 2; this.sines = new double[points]; for (int i = 0; i < points; i++) { double radians = (Math.PI / SCALEFACTOR) * i; this.sines[i] = Math.sin(radians); } } public void paintComponent(Graphics g) { int maxWidth = getWidth(); double hstep = (double) maxWidth / (double) points; int maxHeight = getHeight(); pts = new int[points]; for (int i = 0; i < points; i++) { pts[i] = (int) (sines[i] * maxHeight / 2 * .95 + maxHeight / 2); } g.setColor(Color.BLUE); for (int i = 1; i < points; i++) { int x1 = (int) ((i - 1) * hstep); int x2 = (int) (i * hstep); int y1 = pts[i - 1]; int y2 = pts[i]; g.drawLine(x1, y1, x2, y2); } } public static void main(String[] args) { JFrame.setDefaultLookAndFeelDecorated(true); JFrame frame = new JFrame("Print the wave pattern"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setBackground(Color.white); frame.setSize(500, 200); WavePrint sw = new WavePrint(); sw.setCycles(10); frame.add(sw); frame.setVisible(true); } }
Output
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Program to print a wave form using in java
Output
![print wave form in java using swing classes](https://www.includehelp.com/java-programs/Images/WavePrint.jpg)
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