JDK: 7b118+
Platform: Any

Brute force testing revealed a case when NPE is not thrown
as specified in the following method if passed Component is null

http://download.java.net/jdk7/docs/api/javax/swing/border/StrokeBorder.html#paintBorder(java.awt.Component, java.awt.Graphics, int, int, int, int)

Throws:
NullPointerException - if the specified c or g are null

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import java.awt.*;
import java.awt.image.BufferedImage;

public class StrokeBorderNPE {

    public static void main(String[] args) {

        new javax.swing.border.StrokeBorder(
                new BasicStroke(100,
                        BasicStroke.CAP_SQUARE,
                        BasicStroke.JOIN_ROUND), Color.BLACK)
                // @throws NullPointerException
                // if the specified {@code c} or {@code g} are {@code null}
                .paintBorder(
                        (Component) null,
                        new BufferedImage(
                                1,1, BufferedImage.TYPE_INT_RGB).createGraphics(),
                        0,0,1,1);
    }
}
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