<div>
Maybe the imagePanel is null. Please post full stack trace
</div>


Maybe the imagePanel is null. Please post full stack trace

<div>
ive declared it like this:<br />
<br />
private JPanel imagePanel, infoPanel = new JPanel();<br />
<br />
is this legal?
</div>


ive declared it like this:

private JPanel imagePanel, infoPanel = new JPanel();

is this legal?

<div>
<div class="content wysiwyg-content">
int cols = d.listOfImages.size() ;<br />
&nbsp; &nbsp; &nbsp; &nbsp; <br />
System.out.println(&quot;cols &quot;+cols); &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&nbsp;prints out 2<br />
&nbsp; &nbsp; &nbsp; &nbsp; <br />
imagePanel.setLayout( new GridLayout( 1, cols ) ) ;<br />
<br />
<br />
whats wrong?
</div>
</div>


int cols = d.listOfImages.size() ;
        
System.out.println("cols "+cols); <<<<<<<<< prints out 2
        
imagePanel.setLayout( new GridLayout( 1, cols ) ) ;


whats wrong?

null pointer

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.