1-) Java - IZGARA ŞEKLİNDE BÖLER MİSAL 4 SATIR 3 SUTUN VE BUTTONLARI YERLESTIRIR

public class gridlayout extends JFrame implements ActionListener {

JPanel panel;

public int sayi = 0;

public gridlayout() {

//super("Add component on JFrame at runtime");

//setLayout(new FlowLayout());

//setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));

panel=new JPanel();

GridLayout experimentLayout = new GridLayout(5,2);

//experimentLayout.setAlignment(FlowLayout.TRAILING);

panel.setLayout(experimentLayout);

//panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));

add(panel);

for(int i=0;i<10;i++) {

JButton button=new JButton("CLICK HERE");

button.setText(String.valueOf(sayi)+" nolu button");

//button.setBounds(0, sayi * 20, 10, 10);

panel.add(button);

button.addActionListener(new aListener());

sayi++; }

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setSize(500,500);

setVisible(true); }

public void actionPerformed(ActionEvent evt) {

panel.add(new JButton("Button"));

panel.revalidate();

validate(); }

class aListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

JButton b = (JButton) e.getSource();

System.out.println(b.getText()); } }

public static void main(String[] args) {

gridlayout acojfar=new gridlayout();

//for (Component c : jPanel1.getComponents())

//{

// if (c instanceof JLabel)

// {

// System.out.println("label var");

// JLabel ll = (JLabel) c;

// ll.setText("deneme");

// }

}}