I'm relatively new to java, and I've been working on a gui. Now when I run my code instead of opening the gui window I get this message in my console: java.lang.NumberFormatException: empty Stringat sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source)at java.lang.Double.parseDouble(Unknown Source)at package.PartA.initialize(PartA.java:215)at package.PartA.<init>(PartA.java:58)at package.PartA$1.run(PartA.java:45)at java.awt.event.InvocationEvent.dispatch(Unknown Source)at java.awt.EventQueue.dispatchEvent(Unknown Source)at java.awt.EventDispatchThread.pumpOneEventForFilters(Unk