import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class Funktionsplotter extends Frame {
// Anfang Attribute
boolean draw = false;
float f,j,h,p1,p2,p3,p4,p5;
float zoom = 1;
//Textfelder
private TextField textField1 = new TextField();
private TextField textField2 = new TextField();
private TextField textField3 = new TextField();
private TextField textField4 = new TextField();
private TextField textField5 = new TextField();
private TextField textField6 = new TextField();
//Label
private Label label1 = new Label();
private Label label2 = new Label();
private Label label3 = new Label();
private Label label4 = new Label();
private Label label5 = new Label();
private Label label6 = new Label();
private Label label7 = new Label();
private Label label8 = new Label();
private Label label9 = new Label();
private Label label10 = new Label();
//Buttons
private Button button1 = new Button();
private Button button2 = new Button();
private Button button3 = new Button();
private Button button4 = new Button();
private Button button5 = new Button();
private Button button6 = new Button();
private Button button7 = new Button();
//Text Area
private TextArea tabelle = new TextArea("", 1, 1, TextArea.SCROLLBARS_BOTH);
//Anleitung
anleitung = new Anleitung();
private Anleitung anleitung;
// Ende Attribute
public Funktionsplotter(String title) {
// Frame-Initialisierung
super(title);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent evt) { System.exit(0); }
});
int frameWidth = 1000;
int frameHeight = 800;
setSize(frameWidth, frameHeight);
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
int x = (d.width - getSize().width) / 2;
int y = (d.height - getSize().height) / 2;
setLocation(x, y);
this.setLayout(null);
this.setBackground(Color.lightGray);
//Panel anlegen
Panel cp = new Panel(null);
add(cp);
cp.setBounds(700,0,300,700);
cp.setBackground(Color.gray);
Panel cp2 = new Panel(null);
add(cp2);
cp2.setBounds(0,700,1000,100);
cp2.setBackground(Color.gray);
// Anfang Komponenten
//Textfield
textField1.setBounds(64, 87, 30, 24);
textField1.setText("0");
cp.add(textField1);
textField2.setBounds(51, 59, 28, 24);
textField2.setText("0");
cp.add(textField2);
textField3.setBounds(116, 60, 28, 24);
textField3.setText("0");
cp.add(textField3);
textField4.setBounds(138, 88, 30, 24);
textField4.setText("0");
cp.add(textField4);
textField5.setBounds(197, 89, 25, 24);
textField5.setText("0");
cp.add(textField5);
textField6.setBounds(170, 625, 33, 24);
textField6.setText("1");
cp.add(textField6);
//Label
label1.setBounds(27, 60, 24, 24);
label1.setText("f(x)=");
label1.setFont(new Font("MS Sans Serif", Font.PLAIN, 13));
cp.add(label1);
label2.setBounds(83, 61, 32, 16);
label2.setText("x^4+");
label2.setFont(new Font("MS Sans Serif", Font.PLAIN, 13));
cp.add(label2);
label3.setBounds(147, 63, 20, 16);
label3.setText("x^3");
label3.setFont(new Font("MS Sans Serif", Font.PLAIN, 13));
cp.add(label3);
label4.setBounds(100, 92, 33, 16);
label4.setText("x^2 +");
label4.setFont(new Font("MS Sans Serif", Font.PLAIN, 13));
cp.add(label4);
label5.setBounds(172, 92, 24, 16);
label5.setText("x +");
label5.setFont(new Font("MS Sans Serif", Font.PLAIN, 13));
cp.add(label5);
label6.setBounds(46, 91, 14, 16);
label6.setText("+");
label6.setFont(new Font("MS Sans Serif", Font.PLAIN, 13));
cp.add(label6);
label7.setBounds(29, 190, 214, 16);
label7.setText("HINWEISE!");
label7.setFont(new Font("MS Sans Serif", Font.PLAIN, 13));
cp.add(label7);
label9.setBounds(29, 210, 214, 16);
label9.setText("Jedes Feld benötigt eine Eingabe!");
label9.setFont(new Font("MS Sans Serif", Font.PLAIN, 13));
cp.add(label9);
//Überschrift
label10.setBounds(29, 25, 214, 16);
label10.setText("Funktionsplotter 1.1");
label10.setFont(new Font("MS Sans Serif", Font.PLAIN, 18));
cp.add(label10);
//Text
label8.setBounds(152, 600, 68, 16);
label8.setText("Zoomfaktor");
label8.setFont(new Font("MS Sans Serif", Font.PLAIN, 13));
cp.add(label8);
//Buttons
button1.setBounds(24, 135, 97, 33);
button1.setLabel("Zeichne");
button1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
button1_ActionPerformed(evt);
}
});
cp.add(button1);
button2.setBounds(24, 590, 121, 41);
button2.setLabel("Reinzoomen");
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
button2_ActionPerformed(evt);
}
});
cp.add(button2);
button3.setBounds(24, 640, 121, 41);
button3.setLabel("Rauszoomen");
button3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
button3_ActionPerformed(evt);
}
});
cp.add(button3);
button4.setBounds(224, 595, 57, 89);
button4.setLabel("Zoomen");
button4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
button4_ActionPerformed(evt);
}
});
cp.add(button4);
button5.setBounds(136, 136, 89, 33);
button5.setLabel("Ableitung");
button5.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
button5_ActionPerformed(evt);
}
});
cp.add(button5);
button6.setBounds(25, 50, 89, 33);
button6.setLabel("Schliessen");
button6.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
button6_ActionPerformed(evt);
}
});
cp2.add(button6);
button7.setBounds(100, 50, 89, 33);
button7.setLabel("Anleitung");
button7.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
button7_ActionPerformed(evt);
}
});
cp2.add(button7);
//Wertetabelle
tabelle.setText("");
tabelle.setEditable(false);
tabelle.setBounds(25, 250, 240, 300);
cp.add(tabelle);
// Ende Komponenten
setResizable(false);
setVisible(true);
}
public float pot (float x,float ex) //Potenzieren
{
float y =1;
for (float i = 0; i< ex; i++)
{
y = y*x;
}
return y;
}
public float func (float x)
{
float y = p1
*pot(x,4)+p2
*pot(x,3)+p3
*pot(x,2)+p4
*x+p5;
return y;
}
//Ableitung bilden
public void Abl ()
{
float koef4, koef3, koef2, koef1;
koef4=Float.valueOf(textField2.getText());
koef3=Float.valueOf(textField3.getText());
koef2=Float.valueOf(textField1.getText());
koef1=Float.valueOf(textField4.getText());
textField2.setText(""+0.0);
textField3.setText(""+(koef4*4));
textField1.setText(""+(koef3*3));
textField4.setText(""+(koef2*2));
textField5.setText(""+koef1);
}
public void paint (Graphics g)
{
//Nullpunkt bei: 350|350
g.drawLine(0,350,700,350);
g.drawLine(350,0,350,700);
g.setColor(Color.red);
tabelle.setText("Wertetabelle"+"\n");
if(draw == true)
{
p1 = Float.valueOf(textField2.getText()); //Koeffizienten werden aus den Textfeldern gelesen
p2 = Float.valueOf(textField3.getText());
p3 = Float.valueOf(textField1.getText());
p4 = Float.valueOf(textField4.getText());
p5 = Float.valueOf(textField5.getText());
for (float i = -350; i<350; i=i+zoom) //x-Werte von -350 bis 350 werden durchgegangen
{
f = func(i); //Funktionswert zum momentanen X-Wert wird gebildet
j = i+zoom;
h = func(j);
int x1,x2,y1,y2;
x1=(int)(i/zoom);
x2=(int)(j/zoom);
y1=(int)(f/zoom);
y2=(int)(h/zoom);
g.drawLine(350+x1,350 - y1,350+x2,350 - y2);
// Wertetabelle
tabelle.setText(tabelle.getText()+" X= "+i+" "+" Y= "+f+"\n");
}
}
}
// Anfang Methoden
public void button1_ActionPerformed(ActionEvent evt) {
// ZEICHNEN
draw = true; //Funktionsplotter soll gezeichnet werden
repaint();
}
public void button2_ActionPerformed(ActionEvent evt) {
// REINZOOMEN
zoom=zoom/2;
textField6.setText(""+(1/zoom));
repaint();
}
public void button3_ActionPerformed(ActionEvent evt) {
// RAUSZOOMEN
zoom=zoom*2;
textField6.setText(""+(1/zoom));
repaint();
}
public void button4_ActionPerformed(ActionEvent evt) {
// ZOOM aus Textfenster
zoom=1/Float.valueOf(textField6.getText());
repaint();
}
public void button5_ActionPerformed(ActionEvent evt) {
// ABLEITUNG ZEICHNEN
Abl(); //Ableitung wird gebildet
draw = true; //Funktionsplotter soll gezeichnet werden
repaint();
}
public void button6_ActionPerformed(ActionEvent evt) {
dispose();
}
public void button7_ActionPerformed(ActionEvent evt) {
anleitung.show();
}
// Ende Methoden
public static void main(String[] args) {
new Funktionsplotter("Funktionsplotter 1.1");
}
}
