How to set size of JButton?

java, jbutton, layout-manager, preferredsize, swing

Solution

Change the layout. Try adding the button to another `JPanel` then add the panel the frame. `BorderLayout` will stretch the button across the available width of the panel when the component is placed in the `NORTH` or `SOUTH` position

import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class TestBorderLayout {

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

    public TestBorderLayout() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JButton fat = new JButton("Fat");
                JButton skinny = new JButton("Skinny");

                JPanel buttonPane = new JPanel();
                buttonPane.add(skinny);

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(fat, BorderLayout.NORTH);
                frame.add(buttonPane, BorderLayout.SOUTH);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

}

Problem

i am trying to set size of JButton, but by default it take whole frame, it's height easily set but i can't set it's width & why its behaving like that i don't know. my code : ``` JButton btnNewButton = new JButton(""); btnNewButton.setPreferredSize(new Dimension(32,0)); ImageIcon icon = new ImageIcon(this.getClass().getResource("/images/images_Left.png")); btnNewButton.setIcon(icon); boxTlacitek.add(btnNewButton); getContentPane().add(btnNewButton, BorderLayout.NORTH); ``` any suggestion please ?

Original source