Java

I want to find a way to convert Microsoft's word to PDF on linux. My idea is to read each word, picture, or table first, and then write their structure into the PDF document. But when I read the format of the document and write it to PDF, only the pictures can be written and the styles are completely different from those in the document. I would like to ask a kind person if you have any experience in this field. Please give me some advice or guidance. Thank you!

package com.company;

import java.util.Scanner;
import java.util.Random;

public class StakingGame {

    static int cashStack = 500000;
    static int amountStaked;

    public static void main(String[] args) {
        System.out.println("Welcome to my staking game.");

        while(cashStack > 0) {
            amountStaked();
            System.out.println("Rolling...");

            whoWon();
        }
        System.out.println("You have no more money.");

    }

    public static void amountStaked() {
        Scanner scan = new Scanner(System.in);
        System.out.println("How much would you like to stake?");

        amountStaked = scan.nextInt();

        System.out.println("You have chosen to stake, " + amountStaked + "$, goodluck.");

    }

    public static int roll() {
        Random r = new Random();

        int min = 0;
        int max = 100;
        int rolled = r.nextInt(max-min) + min;

        return rolled;
    }

    public static void whoWon() {

        int playerRoll = roll();
        int computerRoll = roll();

        System.out.println("You have rolled a " + playerRoll);
        System.out.println("Your oppent has rolled a " + computerRoll);

        if(playerRoll > computerRoll) {
            stakeWon(0);
        } else if (playerRoll < computerRoll) {
            stakeLost(0);
        } else {
            System.out.println("You guys tied.");
        }
    }

    public static int stakeWon(int newAmount) {

        newAmount = cashStack + amountStaked;
        cashStack = newAmount;

        System.out.println("You have won the stake! You now have " + cashStack);
        return cashStack;
    }

    public static int stakeLost(int newAmount) {

        newAmount = cashStack - amountStaked;
        cashStack = newAmount;

        System.out.println("You have lost the stake.. You now have " + cashStack);
        return cashStack;
    }
}

public static void main(String[] args) {
    System.out.println("Welcome to my staking game.");

    while(cashStack > 0) {
        amountStaked();
        System.out.println("Rolling...");

        whoWon();
    }
    System.out.println("You have no more money.");

}

public String getLogin(StudentTO sto)

{
String u=sto.getUsername();
String p=sto.getPassword();

System.out.println(sto.getUsername());
System.out.println(sto.getPassword());





String sql="select * from studentstable";
System.out.println(sql);



Object obj=JdbcTemplate.queryForObject(sql, new RowMapper() {




  public Object mapRow(ResultSet rs) throws SQLException {



  rs.beforeFirst();

      while (rs.next()) {

      String userdb=rs.getString("username");
      String passdb=rs.getString("password");
      String roledb=rs.getString("role");
      String string="";


  if(userdb.equals(u) && passdb.equals(p) && roledb.equalsIgnoreCase("admin")) { 
      System.out.println("ADMIN_ROLE");

      string="ADMIN";

      return string;//this result i want to return in my method as String


  }else if(userdb.equals(u) && passdb.equals(p) && roledb.equalsIgnoreCase("user")) {

      System.out.println("USER_ROLE");

      string="USER";

      return string;//this result i want to return in my method as String

  }

Object obj=string;

  }//end ofwhile (rs.next())


      return obj;      <-------------------------------------------//error line



  }//end of Object mapRow(ResultSet rs)


 

});//end queryForObject



StudentTO sto1=(StudentTO)obj;

System.out.println(sto1);

  return sto1.toString(); 


}