JDBC ResultSet Help

I have a number of calls calling my databaseutility class and passing in an appropiate select statement and will return a d/b result of various different sizes and i want the result stored in a string variable to be returned as a variable to another class, however i am having to manually setup size of record how do i do that dynamically i know how but the string variable is putting me off can anyone point me in the write direction
Want to change whats in red so i dont need to specify size of record been returned from db
while(result.next())
{

queryresult=" " + resultmeta.getColumnName(1) + " " + result.getObject(1)+" "+resultmeta.getColumnName(2) + " " + result.getObject(2)+" "+resultmeta.getColumnName(3) + " " + result.getObject(3)+" ";
}

package ie.travel.databaseutility;
import java.sql.*;
import java.util.ArrayList;
import com.mysql.jdbc.exceptions.*;

public class DatabaseUtility {
	
 private Connection con;
 
//Main constructor will establish db connection	
public DatabaseUtility(){
	  String username = "root";
      String password = "";
      try {//Load D/B Driver
          Class.forName("com.mysql.jdbc.Driver");
      } catch (ClassNotFoundException e) {
          String error = "Error Loading Travel 2.0 Database Driver" + e;
          System.out.println(error);
      }

      try {//Establish D/B Connection
          String url = "jdbc:mysql://localhost:3306/Travel";
          con = DriverManager.getConnection(url, username, password);
          con.setAutoCommit(false);
      } catch (Exception e) {
          String error = "Error Establishing Travel 2.0 DatabaseConnection" + e;
          System.out.println(error);
      }
      
      
}

public String selectRecord(String selectstatement){
	String queryresult=null;
	try{
		Statement stmt = con.createStatement();
		ResultSet result = stmt.executeQuery(selectstatement);
		ResultSetMetaData resultmeta = result.getMetaData();
		//int columnCount = resultmeta.getColumnCount();
		//String query[]=null;
        while(result.next())
        {
		 
		  queryresult=" " + resultmeta.getColumnName(1) + " " + result.getObject(1)+" "+resultmeta.getColumnName(2) + " " + result.getObject(2)+" "+resultmeta.getColumnName(3) + " " + result.getObject(3)+" ";
		}
		 
		con.commit();
	}catch(Exception e){
		 try{
			 con.rollback();
			 return "Error Travel 2.0 has been Rolled Back" + e;
		 }
		 catch(SQLException ex){
				 return "Error Travel 2.0 SQL Error" + ex;
			 
		 }
	}
	finally{
		try{
			con.close();
		}catch(SQLException ex){
		 return "Error Travel 2.0 Connection Close" + ex;
		 }
	}
	
		if (queryresult == null){
			return "Error Record Not in Travel 2.0";
		}
		else {
			
			return queryresult;
			
		}
	}

 public String insertRecord(String insertstatement)
 {
	   int result;
		try{
			Statement stmt = con.createStatement();
			result = stmt.executeUpdate(insertstatement);
			con.commit();
		}catch(Exception e){
			 try{
				 con.rollback();
				 return "Error Travel 2.0 has been Rolled Back" + e;
			 }
			 catch(SQLException ex){
				 return "Error Travel 2.0 SQL Error" + ex;
			 }
		}finally{
			try{
				con.close();
				
			}catch(SQLException ex){
			 return "Error Travel 2.0 Connection Close" + ex;
			 }
		}
		if (result!=0){
			return "Travel 2.0 Record Entry Successfull";
		}
		else {
			return "Travel 2.0 Record Entry Failure";
		}
		
		
			
 }
	

//public String updateRecord(String updatestatement){
	
//}

public String deleteRecord(String deletestatement){
	 int result;
		try{
			Statement stmt = con.createStatement();
			result = stmt.executeUpdate(deletestatement);
			con.commit();
		}catch(Exception e){
			 try{
				 con.rollback();
				 return "Error Travel 2.0 has been Rolled Back"+e;
			 }
			 catch(SQLException ex){
				 return "Error Travel 2.0 SQL Error" + ex;
			 }
		}finally{
			try{
				con.close();
				
			}catch(SQLException ex){
			 return "Error Travel 2.0 Connection Close" + ex;
			 }
		}
		if (result!=0){
			return "Travel 2.0 Record Removal Successfull";
		}
		else {
			return "Travel 2.0 Record Removal Failure";
		}
 }
public String updateRecord(String updatestatement){
	 int result;
		try{
			Statement stmt = con.createStatement();
			result = stmt.executeUpdate(updatestatement);
			con.commit();
		}catch(Exception e){
			 try{
				 con.rollback();
				 return "Error Travel 2.0 has been Rolled Back";
			 }
			 catch(SQLException ex){
				 return "Error Travel 2.0 SQL Error" + ex;
			 }
		}finally{
			try{
				con.close();
				
			}catch(SQLException ex){
			 return "Error Travel 2.0 Connection Close" + ex;
			 }
		}
		if (result!=0){
			return "Travel 2.0 Record Update Successfull";
		}
		else {
			return "Travel 2.0 Record Update Failure";
		}
}
}