import java.text.DecimalFormat;

public class DecimalFormat_Test {

    public static void main(String[] args){
        double payment;
        payment = 12345.00;
        System.out.println("payment = 12345.00");
        DecimalFormat nf = new DecimalFormat("#,###.00");
        System.out.println("#,###.00 = "+ nf.format(payment));
        nf = new DecimalFormat("####.##");
        System.out.println("#,###.## = "+ nf.format(payment));
        payment = 0.5111;
        System.out.println("payment = 0.5111");
        nf = new DecimalFormat("#.0000");
        System.out.println("#.0000 = "+ nf.format(payment));
        nf = new DecimalFormat("0.0000");
        System.out.println("0.0000 = "+ nf.format(payment));
  }
}