import java.util.*;
import java.lang.*;
import java.io.*;
class hashtable
{
static Hashtable<String,Double> stud=new Hashtable<String,Double>();
public static void main(String args[])
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
do {
System.out.println("****************MENU*****************");
System.out.println("1:ACCEPT RECORD\n2:DISPLAY ALL RECORDS\n3:FIND HIGHEST\n4:EXIT");
System.out.println("\nEnter your choice:");
int ch=0;
try
{
ch=Integer.parseInt(br.readLine());
}
catch(IOException e)
{
System.out.println(e);
}
switch(ch)
{
case 1:
accept();
break;
case 2:
displayall();
break;
case 3:
fhigh();
break;
case 4:
System.exit(0);
default:
System.out.println("You entered wrong choice! TRY AGAIN!!");
break;
}
}while(true);
}
public static void accept()
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String name="";
Double d=0.0;
System.out.println("Enter the name:");
try
{
name=br.readLine();
System.out.println("Enter the percentage:");
d=Double.parseDouble(br.readLine());
}
catch(IOException e)
{
System.out.println(e);
}
stud.put(name,d);
}
public static void displayall()
{
Enumeration keys=stud.keys();
while(keys.hasMoreElements())
{
String key=(String)keys.nextElement();
System.out.println(key+"="+stud.get(key));
}
}
public static void fhigh()
{
Double max=0.0;
Enumeration keys=stud.keys();
while(keys.hasMoreElements())
{
String key=(String)keys.nextElement();
if(max<stud.get(key))
max=stud.get(key);
}
System.out.println("Highest Marks="+max);
}
}
*****************************************************************
OUTPUT
******************************************************************
Enter your choice:
1
Enter the name:
vijay
Enter the percentage:
71
****************MENU*****************
1:ACCEPT RECORD
2:DISPLAY ALL RECORDS
3:FIND HIGHEST
4:EXIT
Enter your choice:
1
Enter the name:
ajay
Enter the percentage:
77
****************MENU*****************
1:ACCEPT RECORD
2:DISPLAY ALL RECORDS
3:FIND HIGHEST
4:EXIT
Enter your choice:
1
Enter the name:
atul
Enter the percentage:
81
****************MENU*****************
1:ACCEPT RECORD
2:DISPLAY ALL RECORDS
3:FIND HIGHEST
4:EXIT
