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Home » Eclipse Projects » Standard Widget Toolkit (SWT) » SWT COM on X64(SWT Com.OleInitialize not working on x64)

Wed, 16 May 2012 15:26

Eclipse User

We are using the Com Component of SWT library to initialize a application in Windows.
We use the code
COM.OleInitialize(0);

This code in java works fine for 3.2.2 with java 32 bit. We are trying to migrate to a 64 bit and swt version 3.7.
The code with the combination of 64bit and swt version 3.7 throws an error message saying
SEVERE: org.eclipse.swt.internal.ole.win32.COM.OleInitialize(I)I
java.lang.NoSuchMethodError: org.eclipse.swt.internal.ole.win32.COM.OleInitialize(I)I

Re: SWT COM on X64 [message #873558 is a reply to message #872765]

Fri, 18 May 2012 10:26

Eclipse User

Method COM.OleInitialize() should be there, but since you're switching
to use 64-bit SWT, its signature changes from COM.OleInitialize(I)I to
COM.OleInitialize(L)I (this is not a portable part of swt because it's
internal). I suspect that your jar was compiled against the 32-bit SWT
3.2.2, and if you re-compile it against 64-bit SWT 3.7 then at runtime
it will attempt look up COM.OleInitialize(L)I instead, which is what the
64-bit swt jar contains.

Grant

On 5/16/2012 3:26 PM, Arvind Arvind S K wrote:
> We are using the Com Component of SWT library to initialize a
> application in Windows.
> We use the code COM.OleInitialize(0);
>
> This code in java works fine for 3.2.2 with java 32 bit. We are trying
> to migrate to a 64 bit and swt version 3.7.
> The code with the combination of 64bit and swt version 3.7 throws an
> error message saying
> SEVERE: org.eclipse.swt.internal.ole.win32.COM.OleInitialize(I)I
> java.lang.NoSuchMethodError:
> org.eclipse.swt.internal.ole.win32.COM.OleInitialize(I)I

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