更新了mac的操作系统到El capitan, 结果发现Matlab打不开了，每次都弹出一个Java error的窗口。现实如下内容
java.lang.NullPointerException
at com.mathworks.widgets.WindowsWidgetFactory$SearchAndClearButton.anyText(WindowsWidgetFactory.java:187)
at com.mathworks.widgets.WindowsWidgetFactory$SearchAndClearButton.getIcon(WindowsWidgetFactory.java:195)
at com.apple.laf.AquaButtonUI.setThemeBorder(AquaButtonUI.java:113)
at com.apple.laf.AquaButtonUI.installDefaults(AquaButtonUI.java:80)
at javax.swing.plaf.basic.BasicButtonUI.installUI(BasicButtonUI.java:88)
at javax.swing.JComponent.setUI(JComponent.java:664)
at javax.swing.AbstractButton.setUI(AbstractButton.java:1807)
at javax.swing.JButton.updateUI(JButton.java:146)
at javax.swing.AbstractButton.init(AbstractButton.java:2172)
at javax.swing.JButton.<init>(JButton.java:136)
. . .
以为是java的版本问题，于是想尽各种办法去下载安装Java6、7，却都不work~~~~~
终于发现有官方的补丁，可以在这里下载
http://www.mathworks.com/support/bugreports/1098655
只要下载，打开，按照指令操作就好，非常简便！
现在matlab重新能用了！
Ref
https://www.mathworks.com/matlabcentral/newsreader/view_thread/336387