import java.text.DecimalFormat;

public class DecimalFormatDemo
{  

     
public static void main(String args[ ]) 
        {   
		  	
			DecimalFormat formatter1 = new DecimalFormat("#.000"); //set number of decimal places 				
			DecimalFormat formatter2 = new DecimalFormat("$ #,###,##0.00"); //currency
			
			DecimalFormat formatter3 = new DecimalFormat("#0%"); //convert value to percentage
			
			double w= 12345.67;
			double x = 12345.6789;
			float y = .25F;
			
			System.out.println(formatter1.format(w)); 
			
						
			System.out.println(formatter2.format(x));
			
					
			System.out.println(formatter3.format(y));
		

			
			
							
		} //closing main method
} //closing class header

/*output
12345.670
$ 12,345.68
25%
*/