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Why to use Argument Index in Java?

Answer»

If you want to reorder OUTPUT in Java, then use Argument Index.

Let’s say the output is:

abc def ghi jkl mno

And you want to reorder and display it as:

ghi jkl mno abc def

For this, use the Argument Index as shown in the FOLLOWING example:

public class DEMO {  public static void main(String[] args) {       System.out.printf("Initial Output = %s %s %s %s %s\n", "abc", "def", "ghi", "jkl", "mno");          System.out.printf("Update output = %3$s %4$s %5$s %1$s %2$s\n", "abc", "def", "ghi", "jkl", "mno" );     } }

The above example displays that we have reordered the output:

Initial Output = abc def ghi jkl mno Update output = ghi jkl mno abc def


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