Verifica 28/01/2010

L’esercizio della verifica consisteva nel fare la conversione da gradi centigradi a gradi Fahrenheit e nel tracciare un grafico

import javax.swing.*;
import java.awt.*;
public class Grafico extends JPanel {
    private int x2=100;
    private int p1;
    private int p2;
    double cast =x2*1.8+32;
    private int y2=(int)cast;
    private int x1=0;
    private int y1=32;
    public void paintComponent(Graphics g){
        int h=this.getHeight();
        g.setColor(Color.RED);
        g.drawLine(x1, h-y1, x2, h-y2);
    }
}

 

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class Verifica {
    JFrame f1=new JFrame("Converti");
    JTextField t1=new JTextField();
    JLabel conv=new JLabel();
    JLabel farin=new JLabel("Temperatura in °F");
    JLabel celsius=new JLabel("temperatura in °C");
    JButton b=new JButton("Converti");
    Grafico g=new Grafico();
    public Verifica(){
        b.addActionListener(new Bottone());
        f1.setLayout(new GridLayout(3,4));
        f1.add(t1);
        f1.add(celsius);
        f1.add(conv);
        f1.add(farin);
        f1.add(g);
        f1.add(BorderLayout.SOUTH,b);
        f1.setSize(500,500);
        f1.setVisible(true);
        f1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    class Bottone implements ActionListener{
        public void actionPerformed(ActionEvent e){
            String valore=t1.getText();
            double valore1=Double.parseDouble(valore);
            Double farinheit=valore1*1.8+32;
            String conversione=Double.toString(farinheit);
            int v=(int)valore1;
            conv.setText(conversione);
            f1.repaint();
        }

    }
    public static void main(String Args[]){
        Verifica v=new Verifica();
    }

}