from spec of
 java.awt.image.Raster.createBandedRaster(int dataType, int w, int h, int scanlineStride, int[] bankIndices, int[] bandOffsets, Point location),
we have:
 IllegalArgumentException – if scanlineStride is less than 0.

However, when I tried large negative values such as -1000 or Integer.MIN_VALUE, I encountered a java.lang.NegativeArraySizeException instead of the expected IllegalArgumentException.

Code Example:
void main(String[] args) {

        int scanlineStride = -100;
        int[] bankIndices = {0, 1, 2};
        int[] bandOffsets = {0, 0, 0};
            WritableRaster.createBandedRaster(
                    DataBuffer.TYPE_BYTE,
                    2, // width
                    2, // height
                    scanlineStride,
                    bankIndices,
                    bandOffsets,
                    new Point(0, 0)
            );
 }

After reviewing the OpenJDK code, I noticed that the exception is thrown before execution reaches the check for scanlineStride < 0. Specifically, it occurs in the following block:

case DataBuffer.TYPE_BYTE:
    d = new DataBufferByte(size, banks);
    break;

As a result, the documented exception behavior is not consistently enforced for all negative values of scanlineStride.



I think this warrants a documentation enhancement to clarify the actual behavior.

Spec (Java SE 27 ) : https://download.java.net/java/early_access/jdk27/docs/api/java.desktop/java/awt/image/Raster.html#createBandedRaster(int,int,int,int,int%5B%5D,int%5B%5D,java.awt.Point)