Encrypting plain-text passwords and passing variables to xml for display in android

Got a couple of questions about this bit of Java code I've cobbled together.

First, how can I encrypt the password variable so that it's not stored in plain text?

Second, can I pass the 'first' & 'last' variables to an XML element to be displayed on an android device? How would I best go about getting the 'first', 'last' variables to be printed on an android screen?

To be clear I am having no trouble getting this code to work, I just want to know how I can use the output in an android app.

import java.sql.*;


public class SQL 
{
    public static void main(String[] args) {
            /*
            Variables that store our login information and SQL driver information.
            url = database url
            dbName = name of table to query
            driver = name of MySQL driver
            userName = username for SQL server
            password = password for SQL server
            */
          String url = "jdbc:mysql://localhost:3306/";
          String dbName = "testdb";
          String driver = "com.mysql.jdbc.Driver";
          String userName = "<insert username for SQL server here>"; 
          String password = "<insert password for SQL server here>";



                  //Start our exception handling block. 
          try {
                  //Connect to the driver? I honestly have no idea what this does.
          Class.forName(driver).newInstance();
                   //Establish a connection to the SQL server
                      Connection conn = DriverManager.getConnection(url+dbName,userName,password); 
                      //Create a statement to be executed.   
                          Statement stmt = conn.createStatement();
                          //The query that will be executed.
                          String sql = "SELECT * FROM Achievments";
                          //Create a results set variable that stores the output of our query.
                          ResultSet rs = stmt.executeQuery(sql);

                          //Start a while loop that executes while there are still results in the table?
                          while(rs.next()){
         //Retrieve by column name
         String first = rs.getString("ach_names");
         String last = rs.getString("ach_text");

         //Display values
         System.out.print(first);
         System.out.println(last);
      }
      rs.close();
   }catch(SQLException se){
      //Handle errors for JDBC
      se.printStackTrace();
   }catch(Exception e){
      //Handle errors for Class.forName
      e.printStackTrace();
   }






          }
}