Units which include an 'i' conform to the IEC standard for binary prefixes. Others are orders of 10.
"); public JLabel lbl_InputSize = new JLabel("Storage Size: "); public JLabel lbl_InputUnits = new JLabel("Input Units: "); public JLabel lbl_OutputUnits = new JLabel("Output Units: "); public JLabel lbl_OutputResults = new JLabel("Results: "); public JLabel lbl_Output = new JLabel(); public JTextField tf_InputSize = new JTextField(20); public JComboBox cb_InputUnits = new JComboBox(comboUnits); public JComboBox cb_OutputUnits = new JComboBox(comboUnits); public JButton b_Submit = new JButton("Calculate"); /** * Constructor */ public MemoryConverter() { lbl_InputSize.setHorizontalAlignment(JLabel.RIGHT); lbl_InputUnits.setHorizontalAlignment(JLabel.RIGHT); lbl_OutputUnits.setHorizontalAlignment(JLabel.RIGHT); lbl_OutputResults.setHorizontalAlignment(JLabel.RIGHT); b_Submit.addActionListener(this); JPanel fields = new JPanel(); fields.setLayout(new GridLayout(4,2)); fields.setBackground(Color.WHITE); Container window = getContentPane(); window.setLayout(new BorderLayout()); fields.add(lbl_InputSize); fields.add(tf_InputSize); fields.add(lbl_InputUnits); fields.add(cb_InputUnits); fields.add(lbl_OutputUnits); fields.add(cb_OutputUnits); fields.add(lbl_OutputResults); fields.add(lbl_Output); //window.add(lbl_Header, "North"); window.add(fields, "Center"); window.add(b_Submit, "South"); window.setBackground(Color.WHITE); } // When "Calculate" button is clicked... public void actionPerformed(ActionEvent event) { String s_InputSize = tf_InputSize.getText(); try { double d_InputSize = Double.valueOf(s_InputSize.trim()).doubleValue(); double d_Output = _GetCalculatedValue(cb_InputUnits.getSelectedIndex(), cb_OutputUnits.getSelectedIndex(), d_InputSize); if(d_Output > Double.MAX_VALUE || d_Output < 0) { lbl_Output.setText("Invalid Input."); } else { lbl_Output.setText(Double.toString(d_Output) + " " + comboUnits[cb_OutputUnits.getSelectedIndex()]); } } catch (NumberFormatException nfe) { lbl_Output.setText("NumberFormatException: " + nfe.getMessage()); } } // Returns converted value... public double _GetCalculatedValue(int inputIndex, int outputIndex, double value) { return (value * unitValues[inputIndex]) / unitValues[outputIndex]; } public void init() { JApplet frm = new MemoryConverter(); frm.setSize(375, 200); frm.setVisible(true); } }