Name: nkR10003 Date: 11/17/2000


JFileChooser.setSelectedFile(File) sometimes throws NullPointerException

Example below demonstrates this problem:
------------------example--------------------
//test.java
import javax.swing.*;
import java.io.*;
public class test {
    public static void main(String[] args) {
        File wdir = new File("/etc");
        for (int i=0; i<1000; i++) {
            try {
                JFileChooser fileChooser = new JFileChooser(wdir);
                File pswd = new File(wdir, "passwd");
                fileChooser.setSelectedFile(pswd);
                if (!fileChooser.getSelectedFile().equals(pswd)) {
                    System.out.println("Method setSelectedFile() works wrong");
                    System.out.println("Test failed");
                    System.exit(0);
                }
            } catch (Exception e) {
                e.printStackTrace();
                System.out.println("Test failed");
                System.exit(0);
            }
        }
        
        System.out.println("Test passed OK");
        System.exit(0);
    }
}
----------------output:----------------------
java.lang.NullPointerException
        at javax.swing.JLabel.setIcon(JLabel.java:377)
        at javax.swing.plaf.metal.MetalFileChooserUI$FileRenderer.getListCellRendererComponent(MetalFileChooserUI.java:637)
        at javax.swing.plaf.basic.BasicListUI.updateLayoutState(BasicListUI.java:772)
        at javax.swing.plaf.basic.BasicListUI.maybeUpdateLayoutState(BasicListUI.java:722)
        at javax.swing.plaf.basic.BasicListUI.getCellBounds(BasicListUI.java:598)
        at javax.swing.JList.getCellBounds(JList.java:845)
        at javax.swing.JList.ensureIndexIsVisible(JList.java:758)
        at javax.swing.plaf.metal.MetalFileChooserUI.setFileSelected(MetalFileChooserUI.java:709)
        at javax.swing.plaf.metal.MetalFileChooserUI.doSelectedFileChanged(MetalFileChooserUI.java:734)
        at javax.swing.plaf.metal.MetalFileChooserUI.access$800(MetalFileChooserUI.java:31)
        at javax.swing.plaf.metal.MetalFileChooserUI$8.propertyChange(MetalFileChooserUI.java:847)
        at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(SwingPropertyChangeSupport.java:162)
        at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(SwingPropertyChangeSupport.java:130)
        at javax.swing.JComponent.firePropertyChange(JComponent.java:3438)
        at javax.swing.JFileChooser.setSelectedFile(JFileChooser.java:417)
        at test.main(test.java:10)
Test failed
---------------------------------------------
To reproduce this failure run the test example from this report on
a multiprocessor machine.
Also, you can reproduce this by running the JCK test (see Justification
field (*)) in JavaTest in single JVM configuration on any machine.

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