RosettaCodeData/Task/History-variables/AspectJ/history-variables-3.aspectj

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public final class Main
{
public static void main(final String[] args)
{
HistoryVariable hv = new HistoryVariable("a");
hv.update(90);
hv.update(12.1D);
System.out.println(hv.toString());
System.out.println(hv.undo());
System.out.println(hv.undo());
System.out.println(hv.undo());
System.out.println(hv.undo());
System.out.println(hv.toString());
hv.dispose();
System.out.println(hv.toString());
}
}