I can’t put picture in a Jbutton

Question

I tried to put the image but it’s just enough NullPointerException, I have tried creating a folder called img inside the briefcase src and point there however unsuccessfully too. I don’t know what I might be doing wrong. The image is in the directory.

Follows the code:

public class GuiTeste {
JFrame frame = new JFrame();
JButton bTOrdenar = new JButton();

public void iniciar() {
bTOrdenar.setIcon(new javax.swing.ImageIcon(getClass().getResource("img/iconOrganize.png")));
frame.setSize(520,120);
frame.setLocationRelativeTo(null);
frame.getContentPane().add(BorderLayout.NORTH,bTOrdenar);
frame.setResizable(false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public static void main(String[] args) {
    GuiTeste teste= new GuiTeste();
    teste.iniciar();
}

}

I also tried the command:

Image img = ImageIO.read(getClass().getResource("img/IconLoad2.bmp")); bTOrdenar.setIcon(new ImageIcon(img));

Answer 1

Your code is not reproducible, but to work, the image needs to be in the package img at the same class level within your project in the IDE. If there is no package img, the image will not be located and will pop nullpointer. Check in your project if the package exists and is at the same level as the class that is trying to access it.

To exemplify the hierarchy in a project without package naming(not recommended):

Being this way, class and package img within the same package, the code performs without errors.

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As mentioned in the comments and as you can see in the figure, is using a hierarchy of packages own in the eclipse, and the ideal is always to inform the complete path, in your case, would be:

getClass().getResource("/br/com/williamcasa/servicodeordenacao/icons/iconOrganize.png");