private void jComboBox1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
//9
txtTot.setText(jComboBox1.getSelectedItem().toString());
tot= Double.parseDouble(txtTot.getText());
CMB= (Double)jComboBox1.getSelectedItem();
Total2=tot+CMB;
txtTot.setText(Double.toString(Total2));
}
From the ComboBox
I'm setting the jtextfield
and the second line I'm taking the string
from the textfield
and trying to convert it into a double
.
Error below:
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Double
at test.Test.jComboBox1ActionPerformed(Test.java:392)
at test.Test.access$600(Test.java:18)
at test.Test$7.actionPerformed(Test.java:134)
at javax.swing.JComboBox.fireActionEvent(JComboBox.java:1258)
at javax.swing.JComboBox.setSelectedItem(JComboBox.java:586)
at javax.swing.JComboBox.setSelectedIndex(JComboBox.java:622)
To me it seems like you are selecting a value from a combobox then trying to add them together to create a grand total, with the total being updated every time you select a new value from the combobox.
This seems to be working for me, Note I've taken the first line away because it interfered with the existing total.
tot= Double.parseDouble(txtTot.getText());
CMB = Double.parseDouble((String) jComboBox1.getSelectedItem());
Total2=tot+CMB;
txtTot.setText(Double.toString(Total2));
Try to print the txtTot.getText () to the console and check whether it is in proper decimal format. Incorrect format could be the cause of error.
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