import java.util.IllegalFormatException;

public class FormatDemo {
	public static void main(String[] args) {
		try {
			int bond = 7;
			int percent = 100;
			String name = "Bond";

			//Could say printf instead of format.
			//%n is the line separator.

			System.out.format("%d%n", bond);
			System.out.format("%3d%n", bond);
			System.out.format("%03d%n", bond);

			System.out.format("%-3d", bond);
			System.out.println("Previous bond was left-justified.");

			System.out.format("%d %d %s%n", bond, percent, name);

			System.out.format("I agree %d%%, Mister %s.%n",
				percent, name);

			System.out.println("I agree " + percent + "%, Mister "
				+ name + ".");
			System.out.println();

			double pi = Math.PI;
			System.out.format("%f%n", pi);
			System.out.format("%10f%n%n", pi);

			//6 decimal places by default.  Can get more or less.
			System.out.format("%10.8f%n", pi);
			System.out.format("%.8f%n", pi);
			System.out.format("%.4f%n%n", pi);

			//Break ties by rounding up.
			System.out.format("%.4f%n", 3.14154);
			System.out.format("%.4f%n", 3.14155);
		}

		catch (IllegalFormatException e) {
			System.err.println(e.getMessage());
		}

		catch (NullPointerException e) { //if 1st arg of format is null
			System.err.println(e.getMessage());
		}
	}
}