Java GUI : iReport Create Parameters and Pass Variable

// Connection
Class.forName("com.mysql.jdbc.Driver");
Connection connect =  DriverManager.getConnection("jdbc:mysql://localhost/mydatabase" +
		"?user=root&password=root");

// Parameters
Map param = new HashMap();
param.put("p1", "val");
param.put("p2", "val");

// Report Viewer
JasperReport ir = JasperCompileManager.compileReport(report);
JasperPrint ip = JasperFillManager.fillReport(ir, param,connect);
JasperViewer.viewReport(ip);

// Connection Close
connect.close();

WHERE CountryCode = $P{sCountryCode}

package com.java.myapp;


import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.swing.JRViewer;
import net.sf.jasperreports.view.JasperViewer;

public class MyForm extends JFrame {

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				MyForm frame = new MyForm();
				frame.setVisible(true);
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public MyForm() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 431, 286);
		setTitle("ThaiCreate.Com Java GUI Tutorial");
		getContentPane().setLayout(null);
		
		
		// Button Report
		JButton btnOpenReport = new JButton("Open Report");
		btnOpenReport.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				
				Connection connect = null;
				
				try {
					Class.forName("com.mysql.jdbc.Driver");
					connect =  DriverManager.getConnection("jdbc:mysql://localhost/mydatabase" +
							"?user=root&password=root");
					
				} catch (ClassNotFoundException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				} catch (SQLException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				
				// Application path
				String report = null;
				try {
					report = new File(".").getCanonicalPath()+ "\\myReport.jrxml";
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
				
				try {
					
					// Parameters
					Map param = new HashMap();
					param.put("sCountryCode", "US");
					
					// Report Viewer
					JasperReport ir = JasperCompileManager.compileReport(report);
					JasperPrint ip = JasperFillManager.fillReport(ir, param,connect);
					
					JFrame frame = new JFrame();
					frame.setTitle("ThaiCreate.Com Customer Report");
					frame.setBounds(100, 100, 800,600);
					frame.getContentPane().add(new JRViewer(ip));
					frame.setVisible(true);
					
				} catch (JRException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				
				try {
					connect.close();
				} catch (SQLException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				
			}
		});
		
		btnOpenReport.setBounds(137, 98, 146, 23);
		getContentPane().add(btnOpenReport);
		setResizable (false);
		
	}
}

Map param = new HashMap();
param.put("sCountryCode", "US");

package com.java.myapp;

import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.swing.JRViewer;
import net.sf.jasperreports.view.JasperViewer;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.JTextField;

public class MyForm extends JFrame {
	
	private JTextField txtCountryCode;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				MyForm frame = new MyForm();
				frame.setVisible(true);
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public MyForm() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 431, 286);
		setTitle("ThaiCreate.Com Java GUI Tutorial");
		getContentPane().setLayout(null);
		
		// Label Country Code
		JLabel lblCountryCode = new JLabel("Country Code");
		lblCountryCode.setHorizontalAlignment(SwingConstants.CENTER);
		lblCountryCode.setBounds(123, 31, 160, 14);
		getContentPane().add(lblCountryCode);
		
		// Text Field CountryCode
		txtCountryCode = new JTextField();
		txtCountryCode.setHorizontalAlignment(SwingConstants.CENTER);
		txtCountryCode.setBounds(161, 56, 86, 20);
		getContentPane().add(txtCountryCode);
		txtCountryCode.setColumns(10);
		setResizable (false);
		
		// Button Report
		JButton btnOpenReport = new JButton("Open Report");
		btnOpenReport.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				
				Connection connect = null;
				
				try {
					Class.forName("com.mysql.jdbc.Driver");
					connect =  DriverManager.getConnection("jdbc:mysql://localhost/mydatabase" +
							"?user=root&password=root");
					
				} catch (ClassNotFoundException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				} catch (SQLException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				
				// Application path
				String report = null;
				try {
					report = new File(".").getCanonicalPath()+ "\\myReport.jrxml";
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
				
				try {
					
					// Parameters
					Map param = new HashMap();
					param.put("sCountryCode", txtCountryCode.getText());
					
					// Report Viewer
					JasperReport ir = JasperCompileManager.compileReport(report);
					JasperPrint ip = JasperFillManager.fillReport(ir, param,connect);
					
					JFrame frame = new JFrame();
					frame.setTitle("ThaiCreate.Com Customer Report");
					frame.setBounds(100, 100, 800,600);
					frame.getContentPane().add(new JRViewer(ip));
					frame.setVisible(true);
					
				} catch (JRException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				
				try {
					connect.close();
				} catch (SQLException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				
			}
		});
		
		btnOpenReport.setBounds(137, 98, 146, 23);
		getContentPane().add(btnOpenReport);
		
	}
}