dbvisualizer报错，NullPointerException

由于电脑装了两个JDK,启动dbvisualizer的时候突然报错。说是空指针异常。
查了网站也有解决方法，从同志们从官网上抄的也不够全面，索性就贴这。
就是指定jre的版本。
是jre，jre，jre，重要的事情说三遍。

首先，错误是这样的：

An internal error occurred:

Exception: java.lang.NullPointerException
java.lang.NullPointerException

The error may have affected the application state.
Please notify vendor.

Stack Trace:

java.lang.NullPointerException
    at java.awt.EventQueue.getCurrentEventImpl(EventQueue.java:836)
    at java.awt.EventQueue.getCurrentEvent(EventQueue.java:831)
    at javax.swing.JComboBox.fireActionEvent(JComboBox.java:1245)
    at javax.swing.JComboBox.contentsChanged(JComboBox.java:1331)
    at javax.swing.JComboBox.intervalRemoved(JComboBox.java:1351)
    at javax.swing.AbstractListModel.fireIntervalRemoved(AbstractListModel.java:179)
    at javax.swing.DefaultComboBoxModel.removeAllElements(DefaultComboBoxModel.java:174)
    at javax.swing.JComboBox.removeAllItems(JComboBox.java:773)
    at com.onseven.dbvis.G.N.ij(Z:2774)
    at com.onseven.dbvis.G.N.sessionEvent(Z:999)
    at com.onseven.dbvis.U.K.ā(Z:507)
    at com.onseven.dbvis.U.M.ā(Z:2031)
    at com.onseven.dbvis.U.K.ā(Z:2641)
    at com.onseven.dbvis.L.F.ć(Z:1275)
    at com.onseven.dbvis.DbVisualizer.Ѧ(Z:310)
    at com.onseven.dbvis.DbVisualizer.Ć(Z:3286)
    at com.onseven.dbvis.DbVisualizer$A.finished(Z:1811)
    at se.pureit.swing.util.SwingWorker$1.run(Z:3429)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:745)
    at java.awt.EventQueue.access$300(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:706)
    at java.awt.EventQueue$3.run(EventQueue.java:704)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:715)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

然后，
官网当然有解决此问题的最佳答案， 请戳这
如果还报错，错误请看图

是因为你的版本低了，换个高版本就行了