Dugmici

package geometrija;

import java.awt.EventQueue;

import javax.swing.JFrame;
import java.awt.BorderLayout;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.JPanel;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.CardLayout;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.LayoutStyle.ComponentPlacement;
import java.awt.GridLayout;

public class Aplikacija {

    private JFrame frame;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Aplikacija window = new Aplikacija();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     */
    public Aplikacija() {
        initialize();
    }

    /**
     * Initialize the contents of the frame.
     */
    private void initialize() {
        frame = new JFrame();
        frame.setBounds(100, 100, 463, 385);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel crtez = new JPanel();
        frame.getContentPane().add(crtez, BorderLayout.CENTER);

        JPanel odabir = new JPanel();
        frame.getContentPane().add(odabir, BorderLayout.NORTH);

        JButton btnTacka = new JButton("Tacka");

        JButton btnLinija = new JButton("Linija");

        JButton btnKvadrat = new JButton("Kvadrat");

        JButton btnPravougaonik = new JButton("Pravougaonik");

        JButton btnKrug = new JButton("Krug");
        GroupLayout gl_odabir = new GroupLayout(odabir);
        gl_odabir.setHorizontalGroup(
            gl_odabir.createParallelGroup(Alignment.LEADING)
                .addGroup(gl_odabir.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(btnTacka, GroupLayout.PREFERRED_SIZE, 55, Short.MAX_VALUE)
                    .addPreferredGap(ComponentPlacement.UNRELATED)
                    .addComponent(btnLinija, GroupLayout.PREFERRED_SIZE, 51, Short.MAX_VALUE)
                    .addPreferredGap(ComponentPlacement.RELATED)
                    .addComponent(btnKvadrat, GroupLayout.PREFERRED_SIZE, 65, Short.MAX_VALUE)
                    .addPreferredGap(ComponentPlacement.RELATED)
                    .addComponent(btnPravougaonik, GroupLayout.PREFERRED_SIZE, 91, Short.MAX_VALUE)
                    .addPreferredGap(ComponentPlacement.RELATED)
                    .addComponent(btnKrug, GroupLayout.PREFERRED_SIZE, 49, Short.MAX_VALUE)
                    .addGap(68))
        );
        gl_odabir.setVerticalGroup(
            gl_odabir.createParallelGroup(Alignment.LEADING)
                .addGroup(gl_odabir.createSequentialGroup()
                    .addGroup(gl_odabir.createParallelGroup(Alignment.BASELINE)
                        .addComponent(btnTacka)
                        .addComponent(btnLinija)
                        .addComponent(btnKvadrat)
                        .addComponent(btnPravougaonik)
                        .addComponent(btnKrug))
                    .addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        odabir.setLayout(gl_odabir);

        JPanel kontrola = new JPanel();
        frame.getContentPane().add(kontrola, BorderLayout.WEST);

        JButton btnSelektuj = new JButton("Selektuj");

        JButton btnModifikuj = new JButton("Modifikuj");

        JButton btnObrisi = new JButton("Obrisi");

        JButton btnObrisiSve = new JButton("Obrisi sve");
        GroupLayout gl_kontrola = new GroupLayout(kontrola);
        gl_kontrola.setHorizontalGroup(
            gl_kontrola.createParallelGroup(Alignment.LEADING)
                .addGroup(gl_kontrola.createSequentialGroup()
                    .addContainerGap()
                    .addGroup(gl_kontrola.createParallelGroup(Alignment.LEADING)
                        .addComponent(btnSelektuj)
                        .addComponent(btnModifikuj)
                        .addComponent(btnObrisi)
                        .addComponent(btnObrisiSve))
                    .addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        gl_kontrola.setVerticalGroup(
            gl_kontrola.createParallelGroup(Alignment.LEADING)
                .addGroup(gl_kontrola.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(btnSelektuj)
                    .addPreferredGap(ComponentPlacement.UNRELATED)
                    .addComponent(btnModifikuj)
                    .addPreferredGap(ComponentPlacement.RELATED)
                    .addComponent(btnObrisi)
                    .addPreferredGap(ComponentPlacement.RELATED, 182, Short.MAX_VALUE)
                    .addComponent(btnObrisiSve)
                    .addContainerGap())
        );
        kontrola.setLayout(gl_kontrola);
    }
}