Java/JavaTemperatureConverter.java at main · abdullahaziz12/Java · GitHub

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importjavax.swing.*;
importjava.awt.event.*;

publicclassJavaTemperatureConverter {

publicstaticvoidmain(String[] args) {

JFrameframe = newJFrame("Temperature Converter");
frame.setSize(400, 300);
frame.setLayout(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// Labels
JLabelcLabel = newJLabel("Celsius:");
cLabel.setBounds(30, 30, 100, 30);

JLabelfLabel = newJLabel("Fahrenheit:");
fLabel.setBounds(30, 80, 100, 30);

// Text Fields
JTextFieldcText = newJTextField();
cText.setBounds(130, 30, 150, 30);

JTextFieldfText = newJTextField();
fText.setBounds(130, 80, 150, 30);

// Buttons
JButtonconvertBtn = newJButton("Convert");
convertBtn.setBounds(30, 140, 100, 30);

JButtonclearBtn = newJButton("Clear");
clearBtn.setBounds(140, 140, 100, 30);

JButtonexitBtn = newJButton("Exit");
exitBtn.setBounds(250, 140, 100, 30);

// ================= EVENT HANDLING =================

// Convert Button
convertBtn.addActionListener(newActionListener() {
publicvoidactionPerformed(ActionEvente) {

try {
// If Celsius field is not empty → convert to Fahrenheit
if (!cText.getText().isEmpty()) {

doublec = Double.parseDouble(cText.getText());
doublef = (c * 9 / 5) + 32;

fText.setText(String.valueOf(f));
 }

// If Fahrenheit field is not empty → convert to Celsius
elseif (!fText.getText().isEmpty()) {

doublef = Double.parseDouble(fText.getText());
doublec = (f - 32) * 5 / 9;

cText.setText(String.valueOf(c));
 }

 } catch (Exceptionex) {
JOptionPane.showMessageDialog(frame, "Invalid Input");
 }
 }
 });

// Clear Button
clearBtn.addActionListener(newActionListener() {
publicvoidactionPerformed(ActionEvente) {
cText.setText("");
fText.setText("");
 }
 });

// Exit Button
exitBtn.addActionListener(newActionListener() {
publicvoidactionPerformed(ActionEvente) {
frame.dispose(); // closes window
 }
 });

// Add to Frame
frame.add(cLabel);
frame.add(fLabel);
frame.add(cText);
frame.add(fText);
frame.add(convertBtn);
frame.add(clearBtn);
frame.add(exitBtn);

frame.setVisible(true);
 }
}