Could someone add the kind of the animal,weight, and age of the animal and write the code? I know that I must go with other collection framework or else add Object instead of String in place for Map. "

import java.util.*;
import java.util.Map.Entry;

public class Zoo
{
 
public static void main(String arg[]){
 

Map m=new HashMap<>();

m.put(100,"cow");

m.put(200,"ox");

m.put(300,"tiger");

m.put(400,"humans");

Scanner sc=new Scanner(System.in);

int choice;

do{

System.out.println("Welcome to Zoo Management");

System.out.println("1.promotion of all available animals of the zoo"+"\n"+"2. new animal added"+"\n"+" 3. search for the new animal depending on the name"+"\n"+" 4.search for an animal acording to the code "+"\n"+"5 animal processing depending on the code"+"\n"+" 6.deletion of animal depending on the code "+"\n"+"7. exit from the application");

System.out.println("enter your choice");

choice =sc.nextInt();

switch(choice){

case 1:

if(!m.isEmpty()) {
Iterator> it = m.entrySet().iterator();
while(it.hasNext()) {
Entry obj = it.next();
System.out.println(obj.getKey()+""+obj.getValue());
 
}
}
break;

case 2:System.out.println("enter animal code and its name");

Integer code=sc.nextInt();
String name=sc.nextLine();
m.put(code,name);
//m.save();
break;

case 3: System.out.println("enter name to search");
name=sc.next();
if(!m.isEmpty()) {
Iterator> it = m.entrySet().iterator();
while(it.hasNext()) {
Entry obj = it.next();
String newname=(String) obj.getValue();
if(name.equalsIgnoreCase(newname)) {
System.out.println(obj.getKey()+""+obj.getValue());
break;
}

 
}

}

break;

case 4:System.out.println("enter code to search");
code=sc.nextInt();
if(!m.isEmpty()) {
Iterator> it = m.entrySet().iterator();
while(it.hasNext()) {
Entry obj = it.next();
Integer newcode=(Integer) obj.getKey();
if(code.equals(newcode)) {
System.out.println(obj.getKey()+""+obj.getValue());
break;
}

 
}

 
}

case 5:System.out.println("enter code to modify");
code=sc.nextInt();
if(!m.isEmpty()) {
Iterator> it = m.entrySet().iterator();
while(it.hasNext()) {
Entry obj = it.next();
Integer newcode=(Integer) obj.getKey();
if(code.equals(newcode)) {

System.out.println("enter animal name");

name=sc.next();

m.put(code,name);

break;
}

 
}

 
}

case 6:System.out.println("enter code of the animal to remove");

code=sc.nextInt();

if(!m.isEmpty()) {
Iterator> it = m.entrySet().iterator();
while(it.hasNext()) {
Entry obj = it.next();
Integer newcode=(Integer) obj.getKey();
if(code.equals(newcode))
{

   m.remove(newcode);
   break;
}
}

   }
default: System.exit(0);

}

}while(choice!=0 && choice<=6);
sc.close();
}