Notes

import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Main {

public String sonuc;


public Main() {
JFrame j1 = new JFrame("Hesap Makinası"); // CTRL SHIFT O
j1.setSize(400,400);
bilesenleriEkle(j1.getContentPane());
j1.setVisible(true);
j1.setDefaultCloseOperation(j1.EXIT_ON_CLOSE);
}

public void bilesenleriEkle(Container contentPane) {
JPanel p1 = new JPanel();
p1.setLayout(null);

JTextField jt = new JTextField();
jt.setBounds(40,50,225,25);
JButton b7 = new JButton("7");
b7.setBounds(40, 100, 45, 45);
b7.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"7");

}
});

JButton b8 = new JButton("8");
b8.setBounds(100, 100, 45, 45);
b8.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"8");

}
});
JButton b9 = new JButton("9");
b9.setBounds(160, 100, 45, 45);
b9.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"9");

}
});
JButton arti = new JButton("+");
arti.setBounds(220, 100, 45, 45);
arti.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"+");

}
});
JButton b4 = new JButton("4");
b4.setBounds(40, 160, 45, 45);
b4.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"4");

}
});
JButton b5 = new JButton("5");
b5.setBounds(100, 160, 45, 45);
b5.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"5");

}
});

JButton b6 = new JButton("6");
b6.setBounds(160, 160, 45, 45);
b6.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"6");

}
});

JButton eksi = new JButton("-");
eksi.setBounds(220, 160, 45, 45);
eksi.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"-");

}
});
JButton b1 = new JButton("1");
b1.setBounds(40, 220, 45, 45);
b1.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"1");

}
});
JButton b2 = new JButton("2");
b2.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"2");
}
});
b2.setBounds(100, 220, 45, 45);
JButton b3 = new JButton("3");
b3.setBounds(160, 220, 45, 45);
b3.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"3");
}
});
JButton bolum = new JButton("/");
bolum.setBounds(220, 220, 45, 45);
bolum.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"/");
}
});
JButton b0 = new JButton("0");
b0.setBounds(40, 280, 45, 45);
b0.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"0");

}
});
JButton c = new JButton("C");
c.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
jt.setText(null);

}
});
c.setBounds(100, 280, 45, 45);
JButton esittir = new JButton("=");
esittir.setBounds(160, 280, 45, 45);
esittir.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {

sonuc = jt.getText();
//Integer temp = Integer.parseInt(sonuc);
Double blabla = Double.parseDouble(sonuc);
System.out.println(blabla+10);


}
});

JButton carpim = new JButton("*");
carpim.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
String temp = jt.getText();
jt.setText(temp +"*");

}
});
carpim.setBounds(220, 280, 45, 45);

p1.add(jt);
p1.add(b7);
p1.add(b8);
p1.add(b9);
p1.add(arti);
p1.add(b4);
p1.add(b5);
p1.add(b6);
p1.add(eksi);
p1.add(b1);
p1.add(b2);
p1.add(b3);
p1.add(bolum);
p1.add(b0);
p1.add(c);
p1.add(esittir);
p1.add(carpim);







p1.add(b9);



contentPane.add(p1);
}

public static void main(String[] args) {
new Main();
}

}