19% Aufschlag per JRadioButton

Jaydon · 9. Dez 2016

Hallo liebe Leute,

habe ein Schulprojekt und mithilfe des JRadioButton2 möchte ich 19% auf die vorher ausgerechnete Summe draufschlagen. Könnt ihr mir sagen was an meinem Code dazu nicht passt? Ebenfalls sollte beim 2. Klicken auf "Summe berechnen" die Einträge der Anzahl (jTextArea4-8) wieder freigegeben werden.

Code:

/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/

/**
*
* @author Jaydon
*/
public class NewJFrame extends javax.swing.JFrame {
double summe;
    /**
     * Creates new form NewJFrame
     */
    public NewJFrame() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                         
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jRadioButton1 = new javax.swing.JRadioButton();
        jRadioButton2 = new javax.swing.JRadioButton();
        jLabel6 = new javax.swing.JLabel();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();
        jTextField1 = new javax.swing.JTextField();
        jTextField2 = new javax.swing.JTextField();
        jTextField3 = new javax.swing.JTextField();
        jTextField4 = new javax.swing.JTextField();
        jTextField5 = new javax.swing.JTextField();
        jTextField6 = new javax.swing.JTextField();
        jTextField7 = new javax.swing.JTextField();
        jTextField8 = new javax.swing.JTextField();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setFont(new java.awt.Font("Lucida Grande", 1, 24)); // NOI18N
        jLabel1.setText("Kaffeehausrechner");

        jLabel2.setText("Kaffee");

        jLabel3.setText("Tee");

        jLabel4.setText("Kuchen");

        jLabel5.setText("Eis");

        jRadioButton1.setText("ohne MwSt.");
        jRadioButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jRadioButton1ActionPerformed(evt);
            }
        });

        jRadioButton2.setText("mit MwSt.");
        jRadioButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jRadioButton2ActionPerformed(evt);
            }
        });

        jLabel6.setText("Summe:");

        jButton1.setFont(new java.awt.Font("Lucida Grande", 1, 13)); // NOI18N
        jButton1.setText("Preise ändern");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jButton2.setFont(new java.awt.Font("Lucida Grande", 1, 13)); // NOI18N
        jButton2.setText("Preise schützen");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });

        jButton3.setFont(new java.awt.Font("Lucida Grande", 1, 13)); // NOI18N
        jButton3.setText("Summe berechen");
        jButton3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton3ActionPerformed(evt);
            }
        });

        jTextField1.setText("3.50");
        jTextField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField1ActionPerformed(evt);
            }
        });

        jTextField2.setText("3.00");
        jTextField2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField2ActionPerformed(evt);
            }
        });

        jTextField3.setText("4.00");
        jTextField3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField3ActionPerformed(evt);
            }
        });

        jTextField4.setText("4.00");
        jTextField4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField4ActionPerformed(evt);
            }
        });

        jTextField5.setText(" ");
        jTextField5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField5ActionPerformed(evt);
            }
        });

        jTextField6.setText(" ");
        jTextField6.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField6ActionPerformed(evt);
            }
        });

        jTextField7.setText(" ");
        jTextField7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField7ActionPerformed(evt);
            }
        });

        jTextField8.setText(" ");
        jTextField8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField8ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(41, 41, 41)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jRadioButton2)
                                    .addComponent(jRadioButton1)
                                    .addComponent(jLabel1))
                                .addGap(280, 280, 280)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                    .addComponent(jButton3)
                                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                        .addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                        .addComponent(jButton2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jLabel2)
                                    .addComponent(jLabel3))
                                .addGap(24, 24, 24)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                    .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 74, Short.MAX_VALUE)
                                    .addComponent(jTextField2))
                                .addGap(31, 31, 31)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                    .addComponent(jTextField5, javax.swing.GroupLayout.PREFERRED_SIZE, 108, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addGroup(layout.createSequentialGroup()
                                        .addComponent(jTextField6)
                                        .addGap(1, 1, 1))))
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jLabel4)
                                    .addComponent(jLabel5))
                                .addGap(18, 18, 18)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jTextField4, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 73, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, 73, javax.swing.GroupLayout.PREFERRED_SIZE))
                                .addGap(31, 31, 31)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jTextField7, javax.swing.GroupLayout.PREFERRED_SIZE, 107, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(jTextField8, javax.swing.GroupLayout.PREFERRED_SIZE, 107, javax.swing.GroupLayout.PREFERRED_SIZE)))))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(73, 73, 73)
                        .addComponent(jLabel6, javax.swing.GroupLayout.PREFERRED_SIZE, 271, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(29, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1)
                .addGap(12, 12, 12)
                .addComponent(jButton1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(jButton2)
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jTextField5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jTextField6, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel4)
                    .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jTextField7, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel5)
                            .addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jTextField8, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(21, 21, 21)
                        .addComponent(jButton3)))
                .addGap(20, 20, 20)
                .addComponent(jRadioButton1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jRadioButton2)
                .addGap(32, 32, 32)
                .addComponent(jLabel6)
                .addContainerGap(18, Short.MAX_VALUE))
        );

        setBounds(0, 0, 746, 386);
    }// </editor-fold>                       

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        jTextField1.setEnabled(true);
        jTextField2.setEnabled(true);
        jTextField3.setEnabled(true);
        jTextField4.setEnabled(true);
    }                                       

    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
        jTextField1.setEnabled(false);
    }                                          

    private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
         jTextField2.setEnabled(false);
    }                                          

    private void jTextField3ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
         jTextField3.setEnabled(false);
    }                                          

    private void jTextField4ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
         jTextField4.setEnabled(false);
    }                                          

    private void jTextField5ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
    }                                          

    private void jTextField6ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
    }                                          

    private void jTextField7ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
    }                                          

    private void jTextField8ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
    }                                          

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        jTextField1.setEnabled(false);
        jTextField2.setEnabled(false);
        jTextField3.setEnabled(false);
        jTextField4.setEnabled(false);
    }                                       

    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                        
        String text_1=jTextField1.getText();
        String text_2=jTextField2.getText();
        String text_3=jTextField3.getText();
        String text_4=jTextField4.getText();
       
        String a1=jTextField5.getText();
        String a2=jTextField6.getText();
        String a3=jTextField7.getText();
        String a4=jTextField8.getText();
       
        double preis_1=Double.parseDouble(text_1);
        double preis_2=Double.parseDouble(text_2);
        double preis_3=Double.parseDouble(text_3);
        double preis_4=Double.parseDouble(text_4);
      
        double anzahl_1=Double.parseDouble(a1);
        double anzahl_2=Double.parseDouble(a2);
        double anzahl_3=Double.parseDouble(a3);
        double anzahl_4=Double.parseDouble(a4);
       
        double summe = preis_1*anzahl_1+preis_2*anzahl_2+preis_3*anzahl_3+preis_4*anzahl_4;
        jLabel6.setText("Summe: "+summe);
       
        jTextField1.setEnabled(false);
        jTextField2.setEnabled(false);
        jTextField3.setEnabled(false);
        jTextField4.setEnabled(false);
        jTextField5.setEnabled(false);
        jTextField6.setEnabled(false);
        jTextField7.setEnabled(false);
        jTextField8.setEnabled(false);
    }                                       

    private void jRadioButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
          if ( jRadioButton2.isSelected() )
{  
    jLabel6.getText();
    jLabel6.setText("Summe: "+summe/100*19+summe);
}
    }                                            

    private void jRadioButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
     
               
    }                                            

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewJFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                    
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JRadioButton jRadioButton1;
    private javax.swing.JRadioButton jRadioButton2;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField jTextField3;
    private javax.swing.JTextField jTextField4;
    private javax.swing.JTextField jTextField5;
    private javax.swing.JTextField jTextField6;
    private javax.swing.JTextField jTextField7;
    private javax.swing.JTextField jTextField8;
    // End of variables declaration                  
}

Cromewell · 9. Dez 2016

Jaydon hat gesagt.:
summe/100*19+summe

Wenn du 19% auf summe rechnen willst, würde ich summe*1.19 rechnen(ist Geschmackssache, ich weiß

. Doch so find ich es ersichtlicher, was passiert).
Was ist denn überhaupt der Fehler? Was funktioniert nicht, wie es soll?

Cromewell · 9. Dez 2016

Also: einmal musst du die Anzahlen default auf 0 setzen, da du sonst eine Exception bekommst, weil der String beim konvertieren empty ist (zudem finde ich es auch übersichtlicher und einheitlicher).
Dann würde ich noch in deinen SummeBerechnenHandler

Java:

if(mwst){
    summe *= 1.19;
}
jLabel6.setText("Summe: "+ new DecimalFormat("#.##").format(summe));

sowas einbauen, damit nur 2 Nachkommastellen angezeigt werden.
Und der Boolean mwst wird, wenn mit Mehrwertsteuer ausgewählt ist, true - sprich, dann rechnet er auf die Summe 19% drauf.

Java:

if (jRadioButton2.isSelected()){
    mwst = true;
}

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19% Aufschlag per JRadioButton

Jaydon

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Cromewell

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Cromewell

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