Beginner Calculator
<p>Im making a calculator but i cant seen to figured what to put my for txtDisplay and my getOperator showing something wrong with it btw my first time posting </p>

<pre><code>public class Calculater1 extends javax.swing.JFrame {
/**
 * Creates new form Calculater
 */
private double total1 = 0.0;
private double total2 = 0.0;
private char math_operator;

public Calculater1() {
    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")
// &lt;editor-fold defaultstate="collapsed" desc="Generated Code"&gt;//GEN-BEGIN:initComponents
private void initComponents() {

    txtDisplay = new javax.swing.JTextField();
    jPanel1 = new javax.swing.JPanel();
    BtnOne = new javax.swing.JButton();
    BtnTwo = new javax.swing.JButton();
    BtnThree = new javax.swing.JButton();
    BtnFour = new javax.swing.JButton();
    BtnFive = new javax.swing.JButton();
    BtnSix = new javax.swing.JButton();
    BtnSeven = new javax.swing.JButton();
    BtnEight = new javax.swing.JButton();
    BtnNine = new javax.swing.JButton();
    BtnZero = new javax.swing.JButton();
    jPanel2 = new javax.swing.JPanel();
    BtnAdd = new javax.swing.JButton();
    BtnSubtract = new javax.swing.JButton();
    BtnMutiply = new javax.swing.JButton();
    BtnDivide = new javax.swing.JButton();
    BtnClear = new javax.swing.JButton();
    BtnEqual = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    setTitle("Calculator");

    txtDisplay.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            txtDisplayActionPerformed(evt);
        }
    });

    BtnOne.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N
    BtnOne.setText("1");
    BtnOne.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnOneActionPerformed(evt);
        }
    });

    BtnTwo.setText("2");
    BtnTwo.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnTwoActionPerformed(evt);
        }
    });

    BtnThree.setText("3");
    BtnThree.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnThreeActionPerformed(evt);
        }
    });

    BtnFour.setText("4");
    BtnFour.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnFourActionPerformed(evt);
        }
    });

    BtnFive.setText("5");
    BtnFive.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnFiveActionPerformed(evt);
        }
    });

    BtnSix.setText("6");
    BtnSix.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnSixActionPerformed(evt);
        }
    });

    BtnSeven.setText("7");
    BtnSeven.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnSevenActionPerformed(evt);
        }
    });

    BtnEight.setText("8");
    BtnEight.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnEightActionPerformed(evt);
        }
    });

    BtnNine.setText("9");
    BtnNine.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnNineActionPerformed(evt);
        }
    });

    BtnZero.setText("0");
    BtnZero.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnZeroActionPerformed(evt);
        }
    });

    BtnAdd.setText("+");
    BtnAdd.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnAddActionPerformed(evt);
        }
    });

    BtnSubtract.setText("-");
    BtnSubtract.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnSubtractActionPerformed(evt);
        }
    });

    BtnMutiply.setText("*");
    BtnMutiply.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnMutiplyActionPerformed(evt);
        }
    });

    BtnDivide.setText("/");
    BtnDivide.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnDivideActionPerformed(evt);
        }
    });

    BtnClear.setText("C");
    BtnClear.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnClearActionPerformed(evt);
        }
    });

    BtnEqual.setText("=");
    BtnEqual.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            BtnEqualActionPerformed(evt);
        }
    });

    javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
    jPanel2.setLayout(jPanel2Layout);
    jPanel2Layout.setHorizontalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel2Layout.createSequentialGroup()
            .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(BtnAdd)
                .addComponent(BtnSubtract)
                .addComponent(BtnMutiply)
                .addComponent(BtnDivide)
                .addComponent(BtnClear)
                .addComponent(BtnEqual))
            .addGap(0, 27, Short.MAX_VALUE))
    );
    jPanel2Layout.setVerticalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel2Layout.createSequentialGroup()
            .addGap(29, 29, 29)
            .addComponent(BtnAdd)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(BtnSubtract)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(BtnMutiply)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(BtnDivide)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(BtnClear)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(BtnEqual)
            .addContainerGap(14, Short.MAX_VALUE))
    );

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel1Layout.createSequentialGroup()
            .addContainerGap()
            .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addComponent(BtnThree, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(BtnZero, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGroup(jPanel1Layout.createSequentialGroup()
                            .addComponent(BtnSix, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                            .addComponent(BtnNine, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE))))
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addComponent(BtnOne, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(BtnFour, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(BtnSeven, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addComponent(BtnTwo, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(BtnFive, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(BtnEight, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );
    jPanel1Layout.setVerticalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel1Layout.createSequentialGroup()
            .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addGap(38, 38, 38)
                    .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(BtnSeven, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(BtnFour, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(BtnOne, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGap(9, 9, 9)
                    .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(BtnFive, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(BtnEight, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(BtnTwo, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                    .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(BtnSix, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(BtnNine, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(BtnThree, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                    .addComponent(BtnZero, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGap(0, 0, Short.MAX_VALUE))
                .addGroup(jPanel1Layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
            .addContainerGap())
    );

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(127, 127, 127)
            .addComponent(txtDisplay, javax.swing.GroupLayout.PREFERRED_SIZE, 150, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
            .addContainerGap(143, Short.MAX_VALUE)
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(19, 19, 19))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(24, 24, 24)
            .addComponent(txtDisplay, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(18, 18, 18)
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap())
    );

    pack();
}// &lt;/editor-fold&gt;//GEN-END:initComponents

private void txtDisplayActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_txtDisplayActionPerformed

}//GEN-LAST:event_txtDisplayActionPerformed

private void BtnNineActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnNineActionPerformed
  String BtnNineText = txtDisplay.getText() + BtnNine.getText();
  txtDisplay.setText( BtnNineText );  
}//GEN-LAST:event_BtnNineActionPerformed

private void BtnEightActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnEightActionPerformed
    String BtnEightText = txtDisplay.getText() + BtnEight.getText();
    txtDisplay.setText( BtnEightText );
}//GEN-LAST:event_BtnEightActionPerformed

private void BtnOneActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnOneActionPerformed
    String BtnOneText = txtDisplay.getText() + BtnOne.getText();
    txtDisplay.setText( BtnOneText );
}//GEN-LAST:event_BtnOneActionPerformed

private void BtnTwoActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnTwoActionPerformed
    String BtnTwoText = txtDisplay.getText() + BtnTwo.getText();
    txtDisplay.setText( BtnTwoText );
}//GEN-LAST:event_BtnTwoActionPerformed

private void BtnThreeActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnThreeActionPerformed
    String BtnThreeText = txtDisplay.getText() + BtnThree.getText();
    txtDisplay.setText( BtnThreeText );
}//GEN-LAST:event_BtnThreeActionPerformed

private void BtnFourActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnFourActionPerformed
    String BtnFourText = txtDisplay.getText() + BtnFour.getText();
    txtDisplay.setText( BtnFourText );
}//GEN-LAST:event_BtnFourActionPerformed

private void BtnFiveActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnFiveActionPerformed
    String BtnFiveText = txtDisplay.getText() + BtnFive.getText();
    txtDisplay.setText( BtnFiveText );
}//GEN-LAST:event_BtnFiveActionPerformed

private void BtnSixActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnSixActionPerformed
    String BtnSixText = txtDisplay.getText() + BtnSix.getText();
    txtDisplay.setText( BtnSixText );
}//GEN-LAST:event_BtnSixActionPerformed

private void BtnSevenActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnSevenActionPerformed
    String BtnSevenText = txtDisplay.getText() + BtnSeven.getText();
    txtDisplay.setText( BtnSevenText );
}//GEN-LAST:event_BtnSevenActionPerformed

private void BtnZeroActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnZeroActionPerformed
    String BtnZeroText = txtDisplay.getText() + BtnZero.getText();
    txtDisplay.setText( BtnZeroText );
}//GEN-LAST:event_BtnZeroActionPerformed

private void BtnAddActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnAddActionPerformed

    String button_text = BtnAdd.getText();
    getOperator(button_text);
}//GEN-LAST:event_BtnAddActionPerformed

private void BtnEqualActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnEqualActionPerformed
    switch ( math_operator ) {
    case '+':
    total2 = total1 + Double.parseDouble(txtDisplay.getText( ) );
    break;
    case '-':
    total2 = total1 + Double.parseDouble(txtDisplay.getText( ) );
    break;
    case '/':   
    total2 = total1 + Double.parseDouble(txtDisplay.getText( ) );
    break;

    case '*':
    total2 = total1 + Double.parseDouble(txtDisplay.getText( ) );
    break;
    }
    txtDisplay.setText( Double.toString(total2) );
    total1 = 0;
}//GEN-LAST:event_BtnEqualActionPerformed

private void BtnClearActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnClearActionPerformed
    total2 = 0;
    txtDisplay.setText("");
}//GEN-LAST:event_BtnClearActionPerformed

private void BtnSubtractActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnSubtractActionPerformed
    String button_text = BtnSubtract.getText();
    getOperator(button_text);
}//GEN-LAST:event_BtnSubtractActionPerformed

private void BtnDivideActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnDivideActionPerformed
    String button_text = BtnDivide.getText();
    getOperator(button_text);
}//GEN-LAST:event_BtnDivideActionPerformed

private void BtnMutiplyActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_BtnMutiplyActionPerformed
    String button_text = BtnMutiply.getText();
    getOperator(button_text);
}//GEN-LAST:event_BtnMutiplyActionPerformed

/**
 * @param args the command line arguments
 */
public static void main(String args[]) {
    /* Set the Nimbus look and feel */
    //&lt;editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "&gt;
    /* 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(Calculater.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(Calculater.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(Calculater.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(Calculater.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //&lt;/editor-fold&gt;

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new Calculater().setVisible(true);
        }
    });
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton BtnAdd;
private javax.swing.JButton BtnClear;
private javax.swing.JButton BtnDivide;
private javax.swing.JButton BtnEight;
private javax.swing.JButton BtnEqual;
private javax.swing.JButton BtnFive;
private javax.swing.JButton BtnFour;
private javax.swing.JButton BtnMutiply;
private javax.swing.JButton BtnNine;
private javax.swing.JButton BtnOne;
private javax.swing.JButton BtnSeven;
private javax.swing.JButton BtnSix;
private javax.swing.JButton BtnSubtract;
private javax.swing.JButton BtnThree;
private javax.swing.JButton BtnTwo;
private javax.swing.JButton BtnZero;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JTextField txtDisplay;
// End of variables declaration//GEN-END:variables
</code></pre>

<p>}</p>
