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Relative indexes are especially useful when creating custom time and date formats

Because of relative indexing, the argument cal need only be passed once, rather than three times. import java.util.Calendar; import java.util.Formatter; public class MainClass {   public static void main(String args[]) {     Formatter fmt = new Formatter();     Calendar cal = Calendar.getInstance();     fmt.format("Today is day %te of %<tB, %<tY", cal);     System.out.println(fmt);   } } Today is day 1 of December, 2006