终于搞定了 这是2008b的一个bug 可以这样修复
2. At the command prompt type: matlabroot. This displays the path to MATLAB root. Write down the path.
3. Exit MATLAB
4. Navigate to the matlab root directory and then to java directory within it.
5. If there is no directory called patch under the java directory, create one there.
6. Navigate to the directory called patch
7. Create the following directory under the patch directory : com\mathworks\page\plottool\propertyeditor\controls (on Windows) or com/mathworks/page/plottool/propertyeditor/controls (on Unix and Mac)
8. Copy the following three files (attached) to the newly created controls directory:
LimitsControl$1.class
LimitsControl$TextControlTransferHandler.class
LimitsControl.class
9. Restart MATLAB.