StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POCreate a DataBufferUShort from a ByteBuffer
primarykey
Id
18922906
data
AcceptedAnswerId
18927781
AnswerCount
2
ClosedDate
CommentCount
7
CommunityOwnedDate
CreationDate
2013-09-20T17:51:20.813
FavoriteCount
0
LastActivityDate
2013-09-21T00:46:05.027
LastEditDate
2013-09-20T22:05:09.017
LastEditorUserId
75062
OwnerUserId
75062
ParentId
0
PostTypeId
1
Score
0
ViewCount
174
LastEditorDisplayName
text
Body
(Oracle Java 1.7, Eclipse Kepler, Ubuntu 12.04 64 bit) I need to create a DataBufferUShort from a ByteBuffer but all my attempts have failed at run time.. How is this done, por favor? Here is one failure: ( java.lang.UnsupportedOperationException ) <pre><code> ShortBuffer sBuf = imageData.asShortBuffer(); // ByteBuffer DataBufferUShort dataBufferUShort = new DataBufferUShort(sBuf.array(), nPixels); </code></pre> Here's the stack trace. Line 156 is the second line in the code snippet above. <pre><code> Exception in thread "main" java.lang.UnsupportedOperationException at java.nio.ShortBuffer.array(ShortBuffer.java:959) at psw.iu.CreateImage.createGrayscaleImage(CreateImage.java:156) at psw.iu.TestCreateImage.<init>(TestCreateImage.java:48) at psw.iu.TestCreateImage.main(TestCreateImage.java:16) </code></pre> Here's the method that creates the ByteBuffer <pre><code> public static ByteBuffer createScaledData(WorkingByteBuffer rawWBB, ByteBuffer scaledByteBuffer) { rawWBB.byteBuffer.rewind(); // byteBuffer is a ByteBuffer scaledByteBuffer.rewind(); ShortBuffer inBuf = rawWBB.byteBuffer.asShortBuffer(); ShortBuffer outBuf = scaledByteBuffer.asShortBuffer(); inBuf.rewind(); outBuf.rewind(); int maxDN = MAX_USHORT; double scaleFactor = (double) maxDN / (double) range; while (inBuf.hasRemaining()) { int value = 0xffff & inBuf.get(); int scaledValue = (int) ((double) (value - min) * scaleFactor + 0.5); if (scaledValue < 0) scaledValue = 0; if (scaledValue > maxDN) scaledValue = maxDN; outBuf.put((short) scaledValue); } return scaledByteBuffer; } </code></pre> Edit This gives no errors but it's not the solution I was looking for. <pre><code> imageData.rewind(); ShortBuffer shortBuffer = imageData.asShortBuffer(); shortBuffer.rewind(); DataBufferUShort dataBufferUShort = new DataBufferUShort( nLines * nPixPerLine); int index = 0; while(shortBuffer.hasRemaining()){ dataBufferUShort.setElem(index++, 0xffff & shortBuffer.get()); } </code></pre>
Tags
<java><awt><nio>
Title
Create a DataBufferUShort from a ByteBuffer
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USNate Lockwood
UserOwnerUserId
1. USNate Lockwood
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 POCreate a DataBufferUShort from a ByteBuffer
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTDownMod
2. VO
 singulars
 PostPostId
 POCreate a DataBufferUShort from a ByteBuffer
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.