MySQL Forums :: JDBC and Java :: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

try {
Connection connection;
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection("jdbc:mysql://localhost/javadatabase","root","");
System.out.println("Testing system");
String sql = "insert into test_data values(?,?,?,?)";
PreparedStatement pst = connection.prepareStatement(sql);
System.out.println("Testing two");

pst.setString(1,txt_fnum.getText());
pst.setString(2,txt_snum.getText());
pst.setString(3,txt_result.getText());
pst.executeUpdate();
} catch(Exception e){
System.err.println(e);
System.exit(1);
}

When I run the code above it gives me an error

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

What should I do to solve that error