Question about formatting output

In the following program the output is being written all on one line. I added line separators "/n". Why are they not working?

Code :

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import javax.swing.*;
import java.io.*;
 
public class Monthly_pay
{
	static final double FED_TAX = .15;
	static final double STATE_TAX = .035;
	static final double SS_TAX = .0575;
	static final double MEDICARE = .0275;
	static final double PENSION = .05;
	static final double HEALTH_INS = 75.00;
 
	public static void main(String[] args)
	{
		String name, grossPay;
		double netPay, dGrossPay, fedTax, stateTax, ssTax, medicare, pension, healthIns;
 
		JOptionPane jop = new JOptionPane();
 
		name = jop.showInputDialog("Please enter the employee name: ");
		grossPay = jop.showInputDialog("Please enter the employee's gross pay: ");
 
		dGrossPay = Double.parseDouble(grossPay);
 
		fedTax = dGrossPay * FED_TAX;
		stateTax = dGrossPay * STATE_TAX;
		ssTax = dGrossPay * SS_TAX;
		medicare = dGrossPay * MEDICARE;
		pension = dGrossPay * PENSION;
		netPay = dGrossPay - (fedTax + stateTax + ssTax + medicare + pension + HEALTH_INS);
 
 
		jop.showMessageDialog(null, "Here is the break down of" + " "  + name + "'s" + " " +
									"monthly pay. " + "/n"
									+ "Gross pay: $" + String.format("%.2f", dGrossPay) + "/n"
									+ "Federal Tax: $" + String.format("%.2f", fedTax) + "/n"
									+ "State Tax: $" + String.format("%.2f", stateTax) + "/n"
									+ "Social Security Tax: $" + String.format("%.2f", ssTax) + "/n"
									+ "Medicare / Medicade: $" + String.format("%.2f", medicare) + "/n"
									+ "Pension Plan: $" + String.format("%.2f", pension) + "/n"
									+ "Health Insurance: $" + String.format("%.2f", HEALTH_INS) + "/n"
									+ "Net Pay: $" + String.format("%.2f", netPay));
 
		System.exit(0);
 
 
	}
}

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Thanks in advance!

Do the /n characters print on the output? That would mean that they are ordinary characters and not the escaped newline character. The escape character is \

LOL DUH?
Thanx!!!! or should I say thanx \\\\\\\\\\\\\\