1-) Java - ÇERÇEVE ŞEKLİNDE BUTTON YERLEŞTİRİR

public class borderlayout extends JFrame implements ActionListener{

JPanel panel;

public int sayi = 0;

public borderlayout() {

panel=new JPanel();

add(panel);

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

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

button.setText(String.valueOf(sayi));

if (sayi == 0) {

add(button,BorderLayout.PAGE_START);

button.addActionListener(new aListener()); }

if (sayi == 1) {

add(button,BorderLayout.CENTER);

button.addActionListener(new aListener()); }

if (sayi == 2) {

add(button,BorderLayout.LINE_START);

button.addActionListener(new aListener()); }

if (sayi == 3) {

add(button,BorderLayout.LINE_END);

button.addActionListener(new aListener()); }

if (sayi == 4) {

add(button,BorderLayout.PAGE_END);

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) {

borderlayout acojfar=new borderlayout();

} }}