What are the benefits of using identical String literals instead of a final variable?

I've come across a class that includes multiple uses of a string literal, "foo". What I'd like to know, is what are the benefits and impact (in terms of object creation, memory usage and speed) of using this approach instead of declaring the String as final and replacing all the literals with the final variable? For example (although obviously not a real word usage): private static final String FINAL_STRING = "foo"; public void stringPrinter(){ for(int i=0;i

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