Specification for javax.swing.JTable says:

    /**
     * Returns the height of a table row, in pixels.
     * The default row height is 16.0.
     */
    public int getRowHeight() { ... }

This is not true for all documented L&Fs. Violated if GTK is used.


Platform: Linux
JCK: 6
JDK: 6, 7
L&F: -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel
Test: api/javax_swing/JTable/index.html#JTableSortingFiltering[setGetRowSorter2001]

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import javax.swing.*;
public class RowHeight {
    public static void main(String[] args) {
        final JTable jTable = new JTable();
        System.out.println("jTable.getRowHeight() = " + jTable.getRowHeight());
    }
}
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With GTF L&F the output will be

jTable.getRowHeight() = 18

Without GTK

jTable.getRowHeight() = 16
Spec was updated according to the evaluation, so failing tests need to be removed / updated accordingly.