time table using methods

import java.util.*;
public class timetable{
static void os(String fday){
if(fday.equals("monday")){
System.out.println("c.phannendra sir");
System.out.println("1st period,5-7 lab");
}
else if(fday.equals("tuesday")){
System.out.println("c.phannendra sir");
System.out.println("5th period");
}
else if(fday.equals("wednesday")){
System.out.println("c.phannendra sir");
System.out.println("5th period");
}
else if(fday.equals("thursday")){
System.out.println("c.phannendra sir");
System.out.println("3rd,6th period");
}
else if(fday.equals("friday")){
System.out.println("c.phannendra sir");
System.out.println("2th period");
}
else if(fday.equals("saturday")){
System.out.println("c.phannendra sir");
System.out.println("no period");
}
else{
System.out.println("holiday");
}
}
static void oopj(String fday){
if(fday.equals("monday")){
System.out.println("dr jayaram sir");
System.out.println("2nd period");
}
else if(fday.equals("tuesday")){
System.out.println("dr jayaram sir");
System.out.println("4th,6th period");
}
else if(fday.equals("wednesday")){
System.out.println("dr jayaram sir");
System.out.println("2-4th period");
}
else if(fday.equals("thursday")){
System.out.println("dr jayaram sir");
System.out.println("2nd period");
}
else if(fday.equals("friday")){
System.out.println("dr jayaram sir");
System.out.println("no period");
}
else if(fday.equals("saturday")){
System.out.println("c.phannendra sir");
System.out.println("4th,5th period");
}
else{
System.out.println("holiday");
}
}
static void flat(String fday){
if(fday.equals("monday")){
System.out.println("swamy sir");
System.out.println("3rd period");
}
else if(fday.equals("tuesday")){
System.out.println("swamy sir");
System.out.println("7th period");
}
else if(fday.equals("wednesday")){
System.out.println("swamy sir");
System.out.println("no period");
}
else if(fday.equals("thursday")){
System.out.println("swamy sir");
System.out.println("4th period");
}
else if(fday.equals("friday")){
System.out.println("swamy sir");
System.out.println("1st period");
}
else if(fday.equals("saturday")){
System.out.println("swamy sir");
System.out.println("3rd period");
}
else{
System.out.println("holiday");
}
}
static void dbms(String fday){
if(fday.equals("monday")){
System.out.println("naresh sir");
System.out.println("4th period");
}
else if(fday.equals("tuesday")){
System.out.println("naresh sir");
System.out.println("2nd period");
}
else if(fday.equals("wednesday")){
System.out.println("naresh sir");
System.out.println("1st period");
}
else if(fday.equals("thursday")){
System.out.println("naresh sir");
System.out.println("5th period");
}
else if(fday.equals("friday")){
System.out.println("naresh sir");
System.out.println("3rd,5-7 period");
}
else if(fday.equals("saturday")){
System.out.println("naresh sir");
System.out.println("2nd period");
}
else{
System.out.println("holiday");
}
}
static void se(String fday){
if(fday.equals("monday")){
System.out.println("sirisha madam");
System.out.println("no period");
}
else if(fday.equals("tuesday")){
System.out.println("sirisha madam");
System.out.println("1,3rd period");
}
else if(fday.equals("wednesday")){
System.out.println("sirisha madam");
System.out.println("6th period");
}
else if(fday.equals("thursday")){
System.out.println("sirisha madam");
System.out.println("8th period");
}
else if(fday.equals("friday")){
System.out.println("sirisha madam");
System.out.println("4th period");
}
else if(fday.equals("saturday")){
System.out.println("sirisha madam");
System.out.println("1st period");
}
else{
System.out.println("holiday");
}
}
public static void main(String args[]){
Scanner s= new Scanner(System.in);
String day;
String sub;
System.out.println("enter subject in lower case ");
sub=s.next();
System.out.println("enter day in lower case ");
day=s.next();
if(sub.equals("os")){
os(day);
}
else if(sub.equals("dbms")){
dbms(day);
}
else if(sub.equals("oopj")){
oopj(day);
}
else if(sub.equals("flat")){
flat(day);
}
else if(sub.equals("se")){
se(day);
}
}
}