Problem : Some when you try the Hello World exercise (as part of your Java Training) you might get the following error when compiling/running Java Programs for the first time in Eclipse Environment on a Mac. You can see it in your error log tab.
System property http.nonProxyHosts has been set to local|*.local|169.254/16|*.169.254/16 by an external source. This value will be overwritten using the values from the preferences
Solution : While editing the Java files, choose Window Editor as the default editor. You can choose it by right clicking on the file -> Open With -> WindowBuilder Editor