Thread: Need help with printf

Hi, so, I'm having trouble using printf because everytime I try to use it this error comes up

Enter the year you were born: 
1993
Your age is: 21
You've lived Exception in thread "main" java.util.MissingFormatArgumentException: Format specifier '.2f'
	at java.util.Formatter.format(Unknown Source)
	at java.io.PrintStream.format(Unknown Source)
	at java.io.PrintStream.printf(Unknown Source)
	at Life_Expectancy.main(Life_Expectancy.java:28)

This is my code and I need to get it to 2 decimal places. Please help!

import java.util.Calendar;
import java.util.Scanner;
 
public class Life_Expectancy {
	public static void main(String[] args) {
		//What values - Avg. life expec. = 77.9
		int year = 0000;
		int born = 0;
		int age = 0;
		double percentage = 0;
		final double avgLife = 77.9;
 
		Scanner input = new Scanner(System.in);
		//User inputs year born
		System.out.println("Enter the year you were born: ");
		born = input.nextInt();
 
		//Get current year (to help calculate age)
		year = Calendar.getInstance().get(Calendar.YEAR);
		//Calculate age and percentage lived
		age = (year - born);
		// %/100 = age/avgLife 
		percentage  = ((age / avgLife) * 100);
		//output (format decimal to 2 places)
		System.out.println("Your age is: " + age);
		System.out.printf("You've lived %.2f" +  percentage + "% of your life.");
 
	}
}

Hi. The problem is at

System.out.printf("You've lived %.2f" +  percentage + "% of your life.");

Here's a quick and handy guide on printf: http://web.cerritos.edu/jwilson/Site..._reference.pdf

See also Learning Java - Chapter 5 : Tech.