Nesne Tabanlı Programlama-2 (Bahar-2016) Hafta-2/2-2

import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.*;
import javax.swing.*;


public class hesapmak extends JFrame implements ActionListener {

	JTextField jtf1, jtf2;
	JLabel jlab;
	public hesapmak() {
		setSize(100, 150);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setLayout(new FlowLayout());
		
		Dimension dmn1 = new Dimension(90, 20);
		Dimension dmn2 = new Dimension(90, 30);
		
		jtf1= new JTextField();
		jtf2= new JTextField();
		jlab = new JLabel("-");
	
		JButton jbtntopla= new JButton("+");
		JButton jbtncikar= new JButton("-");
		
		jbtntopla.setActionCommand("toplama");
		
		jbtntopla.addActionListener(this);
		jbtncikar.addActionListener(this);
		
		jtf1.setPreferredSize(dmn1);
		jtf2.setPreferredSize(dmn1);
		jlab.setPreferredSize(dmn1);
		jbtntopla.setPreferredSize(dmn2);
		jbtncikar.setPreferredSize(dmn2);
	
		add(jtf1);
		add(jtf2);
		add(jlab);
		add(jbtntopla);
		add(jbtncikar);
	
		setVisible(true);
		
	}

	@Override
	public void actionPerformed(ActionEvent arg0) {
		try{
			
			int sayi1= Integer.parseInt(jtf1.getText());
			int sayi2= Integer.parseInt(jtf2.getText());
			
			if(arg0.getActionCommand().equals("toplama"))
				jlab.setText("Sonuç:"+(sayi1+sayi2));
			else
				jlab.setText("Sonuç:"+(sayi1-sayi2));	
			
			
		}
		catch(Exception ex)
		{
			JOptionPane.showMessageDialog(this, "Girilen Bilgiler Uygun Formatta Değil!","Hata!",JOptionPane.ERROR_MESSAGE);
		}

	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		new hesapmak();
	}

}