NOTE. . The approach below does not meet the updated requirements described by @BillMan in the comments on the question. This one will not automatically wrap strings longer than the length of the console string - use this approach only if wrapping is not a problem.
As a simple option, you can use
String.replaceAll() as follows:
String output = <your string here> String indented = output.replaceAll("(?m)^", "\t");
If you are not familiar with Java regular expressions, it works as follows:
(?m) provides multi-line mode. This means that each line in output treated separately, rather than treating output as one line (which is the default).^ is a regular expression matching the beginning of each line.\t forces each match of the previous regular expression (i.e. the beginning of each line) to be replaced by a tab character.
The following code is an example:
String output = "foo\nbar\nbaz\n" String indented = output.replaceAll("(?m)^", "\t"); System.out.println(indented);
Produces this conclusion:
foo
bar
baz