printf

[meeta gaur]

class StringExample
{
	public static void main(String[] args) 
	{
		int i=0;
		float f=1.2f;
		long l=12;
		double d=12.4;
		String s="hello";
		System.out.printf("%d \t %f \t %d \t %s",i,f,d,s); 
	}
}

0 1.200000 Exception in thread "main" java.util.IllegalFormatConversionException: d != java.lang.Double
at java.util.Formatter$FormatSpecifier.failConversion(Formatter.java:4045)
at java.util.Formatter$FormatSpecifier.printInteger(Formatter.java:2748)
at java.util.Formatter$FormatSpecifier.print(Formatter.java:2702)
at java.util.Formatter.format(Formatter.java:2488)
at java.io.PrintStream.format(PrintStream.java:970)
at java.io.PrintStream.printf(PrintStream.java:871)
at StringExample.main(StringExample.java:10)

[Kemal Sokolovic]

As you can read here you should use "%d" for integers, and "%f" for both float and double values.

Edit: The 'd' in "%d" refers to number system (decimal), as stated in the API.