Preparing Java Web Start Applications for Testing

• Locate the javaws.policy file, which is normally located in the \lib\security\ subfolder of the JRE (Java Runtime Environment) folder.

  Prepare the javaws.policy file for the JRE that has the same bitness as the tested Java Web Start application.

• Open this file in the appropriate text editor.

• Write the following lines for the grant group:

  permission java.lang.RuntimePermission "accessClassInPackage.sun.awt.windows";
  permission java.lang.RuntimePermission "accessDeclaredMembers";
  permission java.lang.reflect.ReflectPermission "suppressAccessChecks";

If your Java Web Start application contains JavaFX controls, make any of the following changes to the <Java-dir>\lib\security\javaws.policy file:

• Add the java.security.AllPermission permission (it will enable all the other permissions):

  grant {
      permission java.security.AllPermission;
  };

– or –

• Specify the permission java.security.AllPermission for the codebase of your Java Web Start app:

  grant codeBase "file:///c:/work/my-javafx-app.jar" {
      permission java.security.AllPermission;
  };

If you are testing a Java Web Start application embedded into a web page, you may need to configure your browser. For example, you may need to set the page’s zoom ratio or prevent security warnings. For detailed instructions, see Preparing Web Browsers for Testing.