The Thread.sleep(1) assertion in doTransaction() strategies is used to increase the execution time of the transaction. The incidence of an exception in one thread doesn’t affect the execution of other threads. It's a separate path of execution. Also note the '''Java''' Plugin from Oracle and the '''JavaScript''' in Firefox are two separate issues as JavaScript doesn't want Java to run. If you need to make use of Java within Firefox, that you must manually create a symbolic link from the plugin file in the release to one of the places that Firefox expects. To make the plugin accessible to all users, create the link inside of the Firefox software's directory, within the plugins subdirectory. The statements contained in the synchronized block all can be found to only one thread at a time. It allows you to handle a number of extensions in a single catch block. 3. Threads are free so it doesn't impression distinctive if unique case occur in a single string. The trick is ensuring that all of the Threads cooperate properly with one another… Coordination amongst both concurrent threads or distributed Java objects is achieved via shared tuple spaces.