Troubleshooting Java Applications

TestComplete cannot get access to a Java application’s internals

Tests are played back incorrectly when using the Windows look and feel

An exception occurs when debugging a Java application

The "Could not create the Java virtual machine" error message is displayed

TestComplete does not record actions with the Java AWT popup menu

TestComplete cannot get access to internal methods and properties of Java objects if the tested application was launched with the -verbose or -verbose:class command-line argument. To resolve this issue, launch your application without these arguments.

If your Java application uses the Java Swing ComboBox, Java Swing List or Java Swing Tree control and the com.sun.java.swing.plaf.windows.WindowsLookAndFeel look and feel, launch your application with the swing.disablevistaanimation command-line parameter set to True, or specify the parameter in the application code. Otherwise, errors may occur when playing back your tests.

Here is an example of how you can specify this parameter:

When you are debugging a Java application and TestComplete is running, an exception may occur in the application. When getting access to internal methods and fields, TestComplete may load classes to memory and the debugger may fail to find the appropriate class reference. To resolve this issue, do not debug your application when TestComplete is running, or do not run your application under a debugger.

During automated testing, when you start a Java application with JDK (or JRE) v. 1.6_18, the "Could not create the Java virtual machine." error message may be displayed. The problem is caused by insufficient memory allocation. 256 Mb of memory is sufficient for a Java application, but the Java 1.6_18 build apparently requires more memory. Since TestComplete loads its helper modules to the address space of the tested application, the application’s memory consumption increases. So, loading additional modules to the application sometimes can lead to exceeding the 256 Mb bound. To avoid this problem, it is recommended to update the Java console with the -Xmx512M parameter to increase memory allocation to 512 Mb.

Due to specifics of the AWT library, TestComplete cannot record actions with menu controls of the java.awt.PopupMenu class. You can resolve the issue by writing the needed script code manually or recording the needed actions with the Java Application Support plugin disabled. Another possible workaround is to use javax.swing.JPopupMenu menus instead of java.awt.PopupMenu in your application.