MySQLSyntaxErrorException: неизвестный столбец «arpit» в «списке полей» ⇐ JAVA

[Anonymous]

Какая ошибка в этой программе JDBC:
package jdbc;

import java.sql.*;
import java.util.Scanner;

public class Table {

public static void main(String[] args) {
String name;
int age;
Scanner sc = new Scanner(System.in);
System.out.println("Enter name and age: ");
name = sc.nextLine();
age = sc.nextInt();
try{
Connection con = DriverManager.getConnection("jdbc:mysql:" +
"//localhost/demo","root","");
Statement st = con.createStatement();
//SQL Query to insert user input
String sql = "insert into tab values(3,"+name+","+age+");";
//Execute INSERT
st.executeUpdate(sql);
//Dislplay table "tab"
ResultSet rs = st.executeQuery("select * from tab");
while(rs.next()){
System.out.println(rs.getInt(1) + " " + rs.getString(2)"+
" " " + rs.getInt(3));
}
} catch(Exception e){
e.printStackTrace();
}
}
}

ВЫВОД:
Enter name and age:
arpit //user input
18 //user input
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'arpit' in 'field list'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:400)
at com.mysql.jdbc.Util.getInstance(Util.java:383)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:980)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3847)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3783)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2447)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2594)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2541)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1604)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1535)
at jdbc.Table.main(Table.java:20)


Подробнее здесь: https://stackoverflow.com/questions/312 ... field-list