Starting with JDK 12, we can indent text via the String.indent(int n) method.
Let's assume that we have the following String values:
String days = "Sunday "
+ "Monday "
+ "Tuesday "
+ "Wednesday "
+ "Thursday "
+ "Friday "
+ "Saturday";
Printing this String values with an indentation of 10 spaces can be done as follows:
System.out.print(days.indent(10));
The output will be as follows:
Now, let's try a cascade indentation:
List<String> days = Arrays.asList("Sunday", "Monday", "Tuesday",
"Wednesday", "Thursday", "Friday", "Saturday");
for (int i = 0; i < days.size(); i++) {
System.out.print(days.get(i).indent(i));
}
The output will be as follows:
Now, let's indent depending on the length of the String value:
days.stream()
.forEachOrdered(d -> System.out.print(d.indent(d.length())));
The output will be as follows:
How about indenting a piece of HTML code? Let's see:
String html = "<html>";
String body = "<body>";
String h2 = "<h2>";
String text = "Hello world!";
String closeH2 = "</h2>";
String closeBody = "</body>";
String closeHtml = "</html>";
System.out.println(html.indent(0) + body.indent(4) + h2.indent(8)
+ text.indent(12) + closeH2.indent(8) + closeBody.indent(4)
+ closeHtml.indent(0));
The output will be as follows:
