import java.awt.BorderLayout; import java.awt.Component; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.JTextPane; public class TemperatureConverter implements ActionListener { private JTextPane outputPane; private JTextField inputField; public Component createContent() { JPanel contentPanel = new JPanel(); contentPanel.setLayout(new BorderLayout(3,3)); contentPanel.add(createOutputPane(), BorderLayout.CENTER); contentPanel.add(createInputField(), BorderLayout.PAGE_START); return contentPanel; } private Component createInputField() { this.inputField = new JTextField(); this.inputField.addActionListener(this); return this.inputField; } private Component createOutputPane() { this.outputPane = new JTextPane(); this.outputPane.setContentType("text/html"); this.outputPane.setEditable(false); return this.outputPane; } public void actionPerformed(ActionEvent e) { String inputStr = this.inputField.getText(); try { int inputInt = Integer.parseInt(inputStr); setOutput(inputInt); } catch(NumberFormatException nfe) { this.outputPane.setText("

Wrong Input

\n"+nfe); } } private void setOutput(int inputInt) { StringBuilder sb = new StringBuilder(); sb.append("

Konvertierung

"); sb.append(" \n"); this.outputPane.setText(sb.toString()); } private static int fahrenheitToCelsius(int fahrenheit) { // TCelsius = ( TFahrenheit - 32 ) × 5 / 9 return ((fahrenheit - 32) * 5) / 9; } private static int celsiusToFahrenheit(int celsius) { // TFahrenheit = (( TCelsius × 9 ) / 5 ) + 32 return ((celsius * 9) / 5) + 32; } public static void main(String[] args) { TemperatureConverter temperatureConverter = new TemperatureConverter(); JFrame frame = new JFrame("TemperatureConverter"); frame.add(temperatureConverter.createContent()); frame.setSize(300, 200); frame.setVisible(true); } }