Hi
Here s ur solution


import java.io.*;

class pizza
{

public static void main(String[] args) throws IOException
{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));
BufferedReader br2 = new BufferedReader(new InputStreamReader(System.in));
String str;
String str1;
String str2;
String str3;
int choice;
int cost_of_pizza=0;
int cost_of_drinks=0;
int pizza_total=0;
int no_of_pizza=0;
int no_of_drinks=0;
int drinks_total=0;
int grand_total=0;
int discount=0;
int choice1=0;
int choice2=0;
String pizzaa = new String();
String drinks = new String();
System.out.println("");
System.out.println("\t\tPIZZA MENU");
System.out.println("");
System.out.println("S.NO TYPES NORMAL COST SUPER COST");
System.out.println("1 Margaritha 36.00 54.00");
System.out.println("2 Hawaii 40.00 60.00");
System.out.println("3 Special 56.00 84.00");
System.out.println("");
System.out.println("How many pizza's you wanna order ");
str = br.readLine();
no_of_pizza = Integer.parseInt(str);
System.out.println("");
System.out.println("You oredered "+no_of_pizza+" pizza's");
System.out.println("");
System.out.println("Which pizza you need ");
System.out.println("");
str = br.readLine();
choice = Integer.parseInt(str);
if(choice==1)
{
System.out.println("You selected Margaritha");
pizzaa = "Margaritha";
System.out.println("");
System.out.println("Which cost you prefare");
System.out.println("");
System.out.println("press 1 for Normal cost and 2 for Super cost");
str = br.readLine();
choice = Integer.parseInt(str);
if(choice==1){
System.out.println("");
System.out.println("You selected Normal cost");
cost_of_pizza=36;
}
else if(choice==2){
System.out.println("");
System.out.println("You selected Super cost");
cost_of_pizza=54;
}
else
System.out.println("Sorry ur's was wrong selection");
}
else if(choice==2)
{
System.out.println("You selected Hawaii ");
pizzaa = "Hawaii";
System.out.println("");
System.out.println("Which cost you prefare");
System.out.println("");
System.out.println("press 1 for Normal cost and 2 for Super cost");
str = br.readLine();
choice = Integer.parseInt(str);
System.out.println("");
if(choice==1){
System.out.println("You selected Normal cost");
cost_of_pizza=40;
}
else if(choice==2){
System.out.println("You selected Super cost");
cost_of_pizza=60;
}
else
System.out.println("Sorry ur's was wrong selection");
}
else if(choice==3)
{
System.out.println("You selected Special ");
pizzaa = "Special";
System.out.println("");
System.out.println("Which cost you prefare");
System.out.println("");
System.out.println("press 1 for Normal cost and 2 for Super cost");
str = br.readLine();
choice = Integer.parseInt(str);
System.out.println("");
if(choice==1){
System.out.println("You selected Normal cost");
cost_of_pizza=56;
}
else if(choice==2){
System.out.println("You selected Super cost");
cost_of_pizza=84;
}
else
System.out.println("Sorry ur's was wrong selection");
}
else
System.out.println("Sorry your choice is wrong");


System.out.println("");
System.out.println("");


System.out.println("SOFT DRINKS MENU");
System.out.println("");
System.out.println("S.NO NAME NORMAL COST SUPER COST");
System.out.println("1 Coco cola 15.00 25.00");
System.out.println("2 Aqua Mineral 10.00 15.00");
System.out.println("3 Orange Juice 5.00 15.00");

System.out.println("");
System.out.println("how many drinks you wanna order");

str = br.readLine();
no_of_drinks = Integer.parseInt(str);
System.out.println("");
System.out.println("You oredered "+no_of_drinks+" drink");
System.out.println("");
System.out.println("Which drink you need ");
str = br.readLine();
choice = Integer.parseInt(str);
System.out.println("");
if(choice==1){
System.out.println("You selected Coco Cola");
drinks = "Coco Cola";
System.out.println("Which cost you prefare");
System.out.println("");
System.out.println("press 1 for Normal cost and 2 for Super cost");
str = br.readLine();
choice = Integer.parseInt(str);
System.out.println("");
if(choice==1){
System.out.println("You selected Normal cost");
cost_of_drinks=15;
}
else if(choice==2){
System.out.println("You selected Super cost");
cost_of_drinks=25;
}
else
System.out.println("Sorry ur's was wrong selection");
} else if(choice==2)
{ System.out.println("");
System.out.println("You selected Aqua Mineral ");
drinks = "Aqua Mineral";
System.out.println("");
System.out.println("Which cost you prefare");
System.out.println("");
System.out.println("press 1 for Normal cost and 2 for Super cost");
str = br.readLine();
choice = Integer.parseInt(str);
System.out.println("");
if(choice==1){
System.out.println("You selected Normal cost");
cost_of_drinks=10;
}
else if(choice==2){
System.out.println("You selected Super cost");
cost_of_drinks=15;
}
else
System.out.println("Sorry ur's was wrong selection");
}else if(choice==3)
{ System.out.println("");
System.out.println("You selected Orange juice ");
drinks = "Orange juice";
System.out.println("Which cost you prefare");
System.out.println("press 1 for Normal cost and 2 for Super cost");
str = br.readLine();
choice = Integer.parseInt(str);
if(choice==1){
System.out.println("You selected Normal cost");
cost_of_drinks=5;
}
else if(choice==2){
System.out.println("You selected Super cost");
cost_of_drinks=15;
}
else
System.out.println("Sorry ur's was wrong selection");
}else
System.out.println("Sorry your choice is wrong");

System.out.println("You wanna change selection ");
System.out.println("if tes press 1 else 0");
//char ch = (char) System.in.read();
str = br.readLine();
choice = Integer.parseInt(str);
if(choice==1)
{
System.out.println("what u want");
System.out.println("press 1 to add some more pizza's to the orders");
System.out.println("press 2 to ass some more drinks to the order ");


str = br.readLine();
choice1 = Integer.parseInt(str);
if(choice1==1)
{
System.out.println("how many pizza you need");
str2 = br1.readLine();
choice2 = Integer.parseInt(str2);
no_of_pizza += choice2;
System.out.println("So u need "+no_of_pizza+ " " +pizzaa+ "pizzas");

}
else if(choice1==2)
{
System.out.println("how many drinks you need");
str2 = br1.readLine();
choice2 = Integer.parseInt(str2);
no_of_drinks += choice2;
System.out.println("So u need "+no_of_drinks+ " " +drinks+ " " +" drinks");

}
else
System.out.println("Thanks for ur order");

}
else
System.out.println("Thanks for ur order");

pizza_total = cost_of_pizza * no_of_pizza;
//System.out.println(pizza_total);
drinks_total = cost_of_drinks * no_of_drinks;
//System.out.println(drinks_total);
grand_total = pizza_total + drinks_total;
//System.out.println(grand_total);
if(grand_total > 150)
{
discount = grand_total * 5 / 100;
grand_total = grand_total - discount;
}
System.out.println("");
System.out.println("");
System.out.println("");
System.out.println("\t\tBILL");
System.out.println("");
System.out.println("Type of pizza : " +pizzaa);
System.out.println("Qty of pizza : " +no_of_pizza);
System.out.println("Type of drinks : " +drinks);
System.out.println("Qty of drinks : " +no_of_drinks);
System.out.println("Grand total : " +grand_total);



}

}


/*do some exception checks*?
/* Thanks...