📁 Java Tutorial 102 - Code Viewer

import java.awt.Color; import java.awt.Font; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.math.BigDecimal; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; public class EsZamanliTextField { public EsZamanliTextField() { JFrame frame = new JFrame("102 Eş zamanlı JTextField Işlemi | Java Blackboard [102]"); frame.setLayout(null); JPanel panel = new JPanel(); // Yesil renkli paneli olusturuyoruz. panel.setLayout(null); panel.setBackground(new Color(222, 254, 212)); // Renk kodu. panel.setBounds(50, 50, 400, 200); // Ubuntu fontu bilgisayarinizda yoksa // bu linkten free olarak indirevilirsiniz: // https://fonts.google.com/?query=Ubuntu Font font = new Font("Ubuntu", Font.BOLD, 27); JLabel labelFiyat = new JLabel("Fiyat :"); labelFiyat.setFont(font); labelFiyat.setHorizontalTextPosition(JLabel.RIGHT); labelFiyat.setBounds(50, 30, 90, 30); JTextField tfFiyat = new JTextField("0.00012500"); tfFiyat.setFont(font); tfFiyat.setBounds(160, 30, 200, 30); JLabel labelAdet = new JLabel("Adet :"); labelAdet.setFont(font); labelAdet.setHorizontalTextPosition(JLabel.RIGHT); labelAdet.setBounds(50, 80, 90, 30); JTextField tfAdet = new JTextField(); tfAdet.setFont(font); tfAdet.setBounds(160, 80, 200, 30); JLabel labelTutar = new JLabel("Tutar :"); labelTutar.setFont(font); labelTutar.setHorizontalTextPosition(JLabel.RIGHT); labelTutar.setBounds(50, 130, 90, 30); JTextField tfTutar = new JTextField("0.0"); tfTutar.setFont(font); tfTutar.setBounds(160, 130, 200, 30); tfFiyat.addKeyListener(new KeyAdapter() { public void keyReleased(KeyEvent e) { double fiyat = 0, adet = 0, tutar = 0; try { fiyat = Double.parseDouble(tfFiyat.getText()); } catch (NumberFormatException ex) { tfFiyat.setText("0.00012500"); } try { adet = Double.parseDouble(tfAdet.getText()); } catch (NumberFormatException ex) { adet = 0; } tutar = fiyat * adet; tfTutar.setText(String.valueOf(tutar)); } }); tfAdet.addKeyListener(new KeyAdapter() { public void keyReleased(KeyEvent e) { double fiyat = 0, adet = 0, tutar = 0; try { fiyat = Double.parseDouble(tfFiyat.getText()); } catch (NumberFormatException ex) { tfFiyat.setText("0.00012500"); } try { adet = Double.parseDouble(tfAdet.getText()); } catch (NumberFormatException ex) { adet = 0; } tutar = fiyat * adet; tfTutar.setText(String.valueOf(tutar)); } }); tfTutar.addKeyListener(new KeyAdapter() { public void keyReleased(KeyEvent e) { double fiyat = 0, adet = 0, tutar = 0; try { fiyat = Double.parseDouble(tfFiyat.getText()); } catch (NumberFormatException ex) { tfFiyat.setText("0.00012500"); } try { tutar = Double.parseDouble(tfTutar.getText()); } catch (NumberFormatException ex) { tutar = 0; } adet = tutar / fiyat; tfAdet.setText(String.valueOf(adet)); } }); panel.add(labelFiyat); panel.add(tfFiyat); panel.add(labelAdet); panel.add(tfAdet); panel.add(labelTutar); panel.add(tfTutar); frame.add(panel); frame.setSize(500, 320); frame.setLocationRelativeTo(null); frame.setResizable(false); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } }