000
31.03.2003, 18:03 Uhr
~Paul
Gast
|
Wie muss ich folgende Datei ändern so, dass nach drücken
der Ergebnis-Taste die korrekten Ergebnisse im Pull-Down-Menue,
in den Checkboxes, im Radion-Button sowie im Textelement korrekt angezeigt
werden.
Danke für Eure Hilfe!
MfG Paul!
| C++: |
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class Quiz extends Applet {
Panel pa;
Label l1, l2, l3, l4, l5, l6, l7;
Choice ch;
Checkbox cb1a, cb1b, cb1c;
Checkbox cb2a, cb2b, cb2c;
CheckboxGroup cbg;
TextField tf;
Button bu;
final Color PAN = Color.green;
Font fH;
boolean corr1, corr2, corr3, corr4;
void addComponent (Component comp, Color col, int x, int y, int w,
int top, int left, int bottom, int right) {
GridBagConstraints c = new GridBagConstraints();
c.gridx = x; c.gridy = y;
c.gridwidth = w; c.gridheight = 1;
c.fill = GridBagConstraints.HORIZONTAL;
c.anchor = GridBagConstraints.CENTER;
c.weightx = 1; c.weighty = 1;
c.insets = new Insets(top,left,bottom,right);
((GridBagLayout)pa.getLayout()).setConstraints(comp,c);
comp.setBackground(col);
comp.setFont(fH);
pa.add(comp);
}
public void init () {
fH = new Font("SansSerif",Font.BOLD,12);
setLayout(new BorderLayout());
pa = new Panel();
pa.setLayout(new GridBagLayout());
pa.setBackground(PAN);
l1 = new Label("1. Wie ist der Druck definiert?");
addComponent(l1,PAN,0,0,3,10,10,0,10);
ch = new Choice();
ch.addItem("Kraft + Fl„che");
ch.addItem("Kraft - Fl„che");
ch.addItem("Fl„che - Kraft");
ch.addItem("Kraft Fl„che");
ch.addItem("Kraft / Fl„che");
ch.addItem("Fl„che / Kraft");
addComponent(ch,Color.white,0,1,4,0,10,0,10);
l2 = new Label("2. Welche der folgenden Aussagen sind richtig?");
addComponent(l2,PAN,0,2,3,10,10,0,10);
cb1a = new Checkbox("F = p A");
cb1b = new Checkbox("A = F / p");
cb1c = new Checkbox("A = p F");
addComponent(cb1a,PAN,0,3,1,0,10,0,10);
addComponent(cb1b,PAN,1,3,1,0,10,0,10);
addComponent(cb1c,PAN,2,3,1,0,10,0,10);
l3 = new Label("3. Welche der folgenden Einheiten ist eine SI-Einheit?");
addComponent(l3,PAN,0,4,3,10,10,0,10);
cbg = new CheckboxGroup();
cb2a = new Checkbox("Torr",cbg,false);
cb2b = new Checkbox("Pascal",cbg,false);
cb2c = new Checkbox("Bar",cbg,false);
addComponent(cb2a,PAN,0,5,1,0,10,0,10);
addComponent(cb2b,PAN,1,5,1,0,10,0,10);
addComponent(cb2c,PAN,2,5,1,0,10,0,10);
l4 = new Label("4. Rechne um:");
addComponent(l4,PAN,0,6,1,10,10,0,0);
l5 = new Label("0,025 N/cmý = ");
addComponent(l5,PAN,1,6,1,10,0,0,0);
tf = new TextField(8);
addComponent(tf,Color.white,2,6,1,10,0,0,0);
l6 = new Label("Pa");
addComponent(l6,PAN,3,6,1,10,5,0,10);
bu = new Button("Ergebnis");
addComponent(bu,Color.cyan,0,7,4,10,10,0,10);
l7 = new Label();
addComponent(l7,PAN,0,8,4,10,10,10,10);
add("Center",pa);
bu.addActionListener(new BuListener());
}
double stringToDouble (String s) {
StringBuffer sbuf = new StringBuffer(s);
double val;
int i;
for (i=0; i<sbuf.length(); i++)
if (sbuf.charAt(i) == ',')
sbuf.setCharAt(i,'.');
try {val = Double.valueOf(sbuf.toString()).doubleValue();}
catch (NumberFormatException e) {val = 0;}
return val;
}
public void actionPerformed (ActionEvent e) {
String s = "Folgende Aufgaben wurden richtig beantwortet: ";
ch.setEnabled(false);
cb1a.setEnabled(false);
cb1b.setEnabled(false);
cb1c.setEnabled(false);
cb2a.setEnabled(false);
cb2b.setEnabled(false);
cb2c.setEnabled(false);
tf.setEnabled(false);
corr1 = (ch.getSelectedIndex() == 4);
corr2 =
(cb1a.getState() && cb1b.getState() && !cb1c.getState());
corr3 = cb2b.getState();
corr4 =
(stringToDouble(tf.getText()) == 250);
if (corr1) s += " 1. ";
if (corr2) s += " 2. ";
if (corr3) s += " 3. ";
if (corr4) s += " 4. ";
l7.setText(s);
}
}
}
|
| Bearbeitung: |
Tags gesetzt
|
Dieser Post wurde am 21.07.2003 um 14:21 Uhr von Loddab editiert. |
