Displaying the Percentage Difference Between the Sorting Times
Lines 43–44 use a NumberFormat (package java.text) to format the ratio of the sort times as a percentage. NumberFormat static method getPercentInstance returns a NumberFormat that’s used to format a number as a percentage. NumberFormat method format performs the formatting. As you can see in the sample output, the sort method took over 400% more time to sort the 15,000,000 random int values.
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