Check out example codes for "java printf tab". It will help you in understanding the concepts better.

Code Example 1

String prefix1 = "short text:";
String prefix2 = "looooooooooooooong text:";
String msg = "indented";
/*
* The second string begins after 40 characters. The dash means that the
* first string is left-justified.
*/
String format = "%-40s%s%n";
System.out.printf(format, prefix1, msg);
System.out.printf(format, prefix2, msg);

result:
short text:                             indented
looooooooooooooong text:                indented

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