Termometro proyecto para sensor

import java.awt.Color;
import java.awt.Graphics;
import java.applet.Applet;
import javax.swing.JApplet;
import javax.swing.JOptionPane;
import javax.swing.JOptionPane;

public class Temperatura extends Applet {
public void init(){

}
public void paint(Graphics g){

g.draw Rect(200, 50, 20, 100);

g.drawOval(10, 70, 100, 100);
g.drawString("-10º", 230, 150);
g.drawString("+100 C", 230, 50);
String aux = JOptionPane.showInputDialog(null,"Ingrese la temperatura deseada","titulo",JOptionPane.DEFAULT_OPTION);

g.drawString("0º", 120, 125);

int temp = Integer.parseInt(aux);

double porc = (double)temp*3.6;
g.fillArc(10, 70, 100, 100, 0, (int)(porc));

g.drawString("+"+temp+" C", 230, 150-temp);
g.setColor(Color.BLUE);
if (temp >80){
g.setColor(Color.RED);
g.fillOval(10, 10, 50, 50);
g.fillRect(200, 50, 20, 100-temp);
g.drawString("Alerta", 30, 10);


}
g.fillOval(10, 10, 50, 50);
g.fillRect(200, 50, 20, 100-temp);
g.fillArc(10, 70, 100, 100, 0, (int)(porc));
}
}