Dessiner des courbes avec java

import java.applet.Applet;
import java.awt.Graphics;

public class Courbe extends Applet {

	//La formule de ta courbe :
	double f(double x) {
		return (Math.cos(x / 5) + Math.sin(x / 7) + 2) * getSize().height / 4;
	}

	public void paint(Graphics g) {
		for (int x = 0; x < getSize().width; x++) {
			g.drawLine(x, (int) f(x), x + 1, (int) f(x + 1));
		}
	}
}

import java.applet.Applet;
import java.awt.Graphics;

public class Histogramme extends Applet {

	//La formule de ton histogramme :
	double f(double x) {
		return (Math.cos(x / 5) + Math.sin(x / 7) + 2) * getSize().height / 4;
	}

	public void paint(Graphics g) {
		for (int x = 0; x < getSize().width; x+=20) {
			g.drawLine(x, getSize().width, x, (int) f(x + 1));
		}
	}
}

import java.awt.Graphics;
import javax.swing.JFrame;

public class Histogramme extends JFrame {

	public Histogramme() {
		setSize(200, 200);
		setVisible(true);
	}

	// La formule de ton histogramme :
	double f(double x) {
		return (Math.cos(x / 5) + Math.sin(x / 7) + 2) * getSize().height / 4;
	}

	public void paint(Graphics g) {
		for (int x = 0; x < getSize().width; x += 20) {
			g.drawLine(x, getSize().width, x, (int) f(x + 1));
		}
	}

	public static void main(String[] args) {
		new Histogramme();
	}
}