Notes

package furkan;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class App1 extends JFrame{
int sayi;
int sonuc=0;
int isaretci=0;
public App1(){

//super("Flow Layout Ornek");
//Container com = null;
//Ekle(com);
//this.setVisible(true);
this.setTitle("Flow Layout Ornek");
this.setSize(300,200);
this.setLayout(new FlowLayout());
Ekle(this.getContentPane());
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}
private void Ekle(Container contentPane){
//contentPane.setLayout(new GridLayout(4,4));
JPanel butonPanel=new JPanel(new GridLayout(4,4));
JPanel ustPanel=new JPanel();
JButton num7=new JButton("7");
JButton num8=new JButton("8");
JButton num9=new JButton("9");
JButton numArti=new JButton("+");
JButton num4=new JButton("4");
JButton num5=new JButton("5");
JButton num6=new JButton("6");
JButton numEksi=new JButton("-");
JButton num1=new JButton("1");
JButton num2=new JButton("2");
JButton num3=new JButton("3");
JButton numCarp=new JButton("*");
JButton num0=new JButton("0");
JButton numClear=new JButton("Clear");
JButton numEsittir=new JButton("=");
JButton numBol=new JButton("/");
JTextField textField=new JTextField(20);
JLabel label=new JLabel("*****");

ustPanel.add(label);
ustPanel.add(textField);

num7.setBackground(Color.BLACK);
num7.setForeground(Color.WHITE);
butonPanel.add(num7);
num7.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(textField.getText()+"7");

}
});
num8.setBackground(Color.BLACK);
num8.setForeground(Color.WHITE);
butonPanel.add(num8);
num8.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(textField.getText()+"8");
}
});
num9.setBackground(Color.BLACK);
num9.setForeground(Color.WHITE);
butonPanel.add(num9);
num9.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(textField.getText()+"9");
}
});
numArti.setBackground(Color.BLACK);
numArti.setForeground(Color.WHITE);
butonPanel.add(numArti);
numArti.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
sonuc=Integer.parseInt(textField.getText());
isaretci=1;
textField.setText(null);
//int toplam=0;
//sayi=Integer.parseInt(textField.getText());
//textField.setText("+");
//textField.setText(null);
//toplam=sayi+toplam;
//sonuc=(String.valueOf(toplam));



}
});
num4.setBackground(Color.BLACK);
num4.setForeground(Color.WHITE);
butonPanel.add(num4);
num4.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(textField.getText()+"4");
}
});
num5.setBackground(Color.BLACK);
num5.setForeground(Color.WHITE);
butonPanel.add(num5);
num5.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(textField.getText()+"5");
}
});
num6.setBackground(Color.BLACK);
num6.setForeground(Color.WHITE);
butonPanel.add(num6);
num6.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(textField.getText()+"6");
}
});
numEksi.setBackground(Color.BLACK);
numEksi.setForeground(Color.WHITE);
butonPanel.add(numEksi);
numEksi.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText("-");
}
});
num1.setBackground(Color.BLACK);
num1.setForeground(Color.WHITE);
butonPanel.add(num1);
num1.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(textField.getText()+"1");
}
});
num2.setBackground(Color.BLACK);
num2.setForeground(Color.WHITE);
butonPanel.add(num2);
num2.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(textField.getText()+"2");
}
});
num3.setBackground(Color.BLACK);
num3.setForeground(Color.WHITE);
butonPanel.add(num3);
num3.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(textField.getText()+"3");
}
});
numCarp.setBackground(Color.BLACK);
numCarp.setForeground(Color.WHITE);
butonPanel.add(numCarp);
numCarp.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText("*");
}
});
num0.setBackground(Color.BLACK);
num0.setForeground(Color.WHITE);
butonPanel.add(num0);
num0.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(textField.getText()+"0");
}
});
numClear.setBackground(Color.BLACK);
numClear.setForeground(Color.WHITE);
butonPanel.add(numClear);
numClear.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText(" ");
isaretci=0;
sonuc=0;
}
});
numEsittir.setBackground(Color.BLACK);
numEsittir.setForeground(Color.WHITE);
butonPanel.add(numEsittir);
numEsittir.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(isaretci==1){
sayi=Integer.parseInt(textField.getText());
sonuc=sayi+sonuc;
textField.setText(String.valueOf(sonuc));
}
}
});
numBol.setBackground(Color.BLACK);
numBol.setForeground(Color.WHITE);
butonPanel.add(numBol);
numBol.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
textField.setText("/");
}
});


contentPane.add(ustPanel);
contentPane.add(butonPanel);
/*add(new Button("üst"), BorderLayout.PAGE_START);
add(new Button("sol"), BorderLayout.LINE_START);
add(new Button("orta"), BorderLayout.CENTER);
add(new Button("sağ"), BorderLayout.LINE_END);
add(new Button("alt"), BorderLayout.PAGE_END);*/
}

public static void main(String[] args) {
// TODO Auto-generated method stub
new App1();

}

}