Sixth Week Term Work Program 2 (Hashing)

Question:
Post Graduate course of CSE department can accommodate a maximum of 20 students. Each
PG student in the department is identified by his/her Roll No, USN, Name, Semester and
Mobile Number. Using the appropriate Collection class, write a Java Program to simulate the
following scenarios:
a. On request, the capacity got increased from 20 to 25.
b. Only 10 students enroll for the course.
c. Four students from Roll No.s 3 – 6 voluntarily un-enroll from the course.
d. After a month, six more students get enrolled in the course.

e. Print the information of all the students currently enrolled in the course.

Java Program:

import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;
import java.util.ListIterator;
import java.util.List;
import java.util.ArrayList;
import java.util.ListIterator;
import java.util.Map;


class StudentDetails{
String name;
String usn;
String div;
String Course="Java";
int sem;
StudentDetails(String name, String usn, String div,  int sem){
this.name=name;
this.usn=usn;
this.div=div;
this.sem=sem;
}

}

public class PgStudent {
public static void main(String[] args) {



Map<Integer,StudentDetails> map=new HashMap<Integer,StudentDetails>(); 
//Creating students
StudentDetails s1=new StudentDetails ("amar","2sd15cs08","b",4); 
StudentDetails  s2=new StudentDetails("Akbar","2sd16cs10","b",4); 
StudentDetails s3=new StudentDetails("Antony","2sd16cs09","b",4); 
StudentDetails s4=new StudentDetails("Ajay","2sd16cs01","b",4);
StudentDetails s5=new StudentDetails("siya","2sd16cs02","b",4);
StudentDetails s6=new StudentDetails("Riya","2sd16cs03","b",4);
StudentDetails s7=new StudentDetails("Maya","2sd16cs04","b",4);
StudentDetails s8=new StudentDetails("Shriya","2sd16cs05","b",4);
StudentDetails s9=new StudentDetails("Fida","2sd16cs06","b",4);
StudentDetails s10=new StudentDetails("Jiya","2sd16cs07","b",4);
//Adding Students to map 
map.put(1,s1);
map.put(2,s2);
map.put(3,s3);
map.put(4,s4);
map.put(5,s5);
map.put(6,s6);
map.put(7,s7);
map.put(8,s8);
map.put(9,s9);
map.put(10,s10);


//Traversing map
for(Map.Entry<Integer, StudentDetails> entry:map.entrySet()){ 
int key=entry.getKey();
StudentDetails b=entry.getValue();
System.out.println("Student "+key);
System.out.println(b.name+" "+b.usn+" "+b.div+" "+b.sem+" "+b.Course); 
} 
System.out.println("-----------------------------------------------------------");



System.out.println("Now students having Usn 3 to 6  will unroll from the course");
map.remove(3);
System.out.println("Student having roll no 3 unrolled");
map.remove(4);
System.out.println("Student having roll no 4 unrolled");
map.remove(5);
System.out.println("Student having roll no 5 unrolled");
map.remove(6);
System.out.println("Student having roll no 6 unrolled");
System.out.println("-----------------------------------------------------------");
System.out.println("List of students after un-rolling from course");
System.out.println("-----------------------------------------------------------");
for(Map.Entry<Integer, StudentDetails> entry:map.entrySet()){ 
int key=entry.getKey();
StudentDetails b=entry.getValue();
System.out.println("Student "+key);
System.out.println(b.name+" "+b.usn+" "+b.div+" "+b.sem+" "+b.Course); 
} 
System.out.println("-----------------------------------------------------------"); 

//After a month 6 more students enrolled

StudentDetails s11=new StudentDetails ("ADI","2sd15cs11","b",4); 
StudentDetails  s12=new StudentDetails("JAI","2sd16cs12","b",4); 
StudentDetails s13=new StudentDetails("RUHI","2sd16cs13","b",4); 
StudentDetails s14=new StudentDetails("RIMA","2sd16cs14","b",4);
StudentDetails s15=new StudentDetails("AMY","2sd16cs15","b",4);
StudentDetails s16=new StudentDetails("ARYA","2sd16cs16","b",4);

map.put(3,s11);
map.put(4,s12);
map.put(5,s13);
map.put(6,s14);
map.put(11,s15);
map.put(12,s16);
System.out.println("Currently Updated list");
for(Map.Entry<Integer, StudentDetails> entry:map.entrySet()){ 
int key=entry.getKey();
StudentDetails b=entry.getValue();
System.out.println("Student "+key);
System.out.println(b.name+" "+b.usn+" "+b.div+" "+b.sem+" "+b.Course); 
} 
System.out.println("-----------------------------------------------------------");
}


}

Credits: Sonali 

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Sixth Week Term Work Program 2 (Arraylist)

Question:
Post Graduate course of CSE department can accommodate a maximum of 20 students. Each
PG student in the department is identified by his/her Roll No, USN, Name, Semester and
Mobile Number. Using the appropriate Collection class, write a Java Program to simulate the
following scenarios:
a. On request, the capacity got increased from 20 to 25.
b. Only 10 students enroll for the course.
c. Four students from Roll No.s 3 – 6 voluntarily un-enroll from the course.
d. After a month, six more students get enrolled in the course.

e. Print the information of all the students currently enrolled in the course.

Solution:

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

class Student{
Scanner in=new Scanner(System.in);
int Rollno;
String usn;
String Name;
int sem;
String Mobileno;
Student() {
System.out.print("Enter The Roll No:");
Rollno=in.nextInt();
System.out.println();
System.out.print("Enter The USN:");
usn=in.next();
System.out.println();
System.out.print("Enter The Name:");
Name=in.next();
System.out.println();
System.out.print("Enter The Sem");
sem=in.nextInt();
System.out.println();
System.out.print("Enter The MobileNo:");
Mobileno=in.next();
System.out.println();

}
Student(String name, int Rollno, String Mobile, String Usn, int sem)
{
this.Name=name;
this.Rollno=Rollno;
this.Mobileno=Mobile;
this.usn =Usn;
this.sem = sem;

}
public String getName() 
{
return Name;
}


public int getRollno() 
{
return Rollno;
}
public String getMobile() 
{
return Mobileno;
}

public String getUsn() 
{
return usn;
}


public int getSemester() 
{
return sem;
}

}
class Course extends Student
{
String course;


Course(String name, int Rollno, String Mobile, String Usn, int sem) 
{
super(name, Rollno, Mobile, Usn, sem);
System.out.println("Enter Course Name:");
course = in.next();


}
public String getCourse() 
{
return course;
}

public void setCourse(String course) 
{
this.course = course;
}
}
public class Pgstudent {
static Scanner in=new Scanner(System.in);
public static void main(String[] args) {
int choice;
int i=0,size=20;
List<Student> studentsList = new ArrayList<Student>(size); // array list to store user input For Student
List<Course> studentsListCourse = new ArrayList<Course>(size); // array list to store user input For Course

while (true) {
System.out.println("\n\n*******************STUDENT RECORD*******************\n");
System.out.println("1. Increase the Capacity");
System.out.println("2. Enter Student Record");
System.out.println("3. Display Record");
System.out.println("4. Enroll Course");
System.out.println("5. DeRoll Course");                                                                        
System.out.println("6. Display Enrolled Student Details");
System.out.println("7. Exit");
System.out.println("Enter choice: ");
choice = in.nextInt();
switch (choice) {
case 1:size=25;
System.out.println("Size Changed to 25");
break;

case 2: if(i<size){

System.out.println("============" + "=================");
System.out.println("Students " + "Personal Details");
System.out.println("============" + "=================");
Student student = new Student();

studentsList.add(student); // add student
i++;
}

else {
System.out.println("U Cannot Store The Student Record");
}
break;
case 3:
for (int j = 0; j < studentsList.size(); j++)
{

Student st = studentsList.get(j);

System.out.println("Information of Student : " + st.getRollno()); 
System.out.println("");
System.out.println("Name: " + st.getName() + " - Roll No: "+st.getRollno() + " - Mobile No: " + st.getMobile() + " - Student USN: " + st.getUsn() + " - Semester: " + st.getSemester());
System.out.println("");
}

break;
case 4:
System.out.println("============ENROLL" + "=================");
System.out.println("============" + "=================");
System.out.println("Enter the Roll NO");
int Froll=in.nextInt(),flag=0;
for (int j = 0; j < studentsList.size(); j++)
{
Student ct = studentsList.get(j);
if(ct.getRollno()==Froll) {
flag=1;
Course course=new Course(ct.getName(),ct.getRollno(), ct.getMobile(),ct.getUsn(),ct.getSemester());
studentsListCourse.add(course); // add student

}
}
if(flag==0) {
System.out.println("No Student Exist With Given RollNo Sorry Try Again");
}

break;
case 5:
System.out.println("Enter the Roll NO");
int Roll=in.nextInt(),flag1=0;
for (int j = 0; j < studentsListCourse.size(); j++)
{

Course ct = studentsListCourse.get(j);
if(ct.getRollno()==Roll) {
flag1=1;
System.out.println("Information of Student : " +ct.getRollno()); 
System.out.println("");
System.out.println("Name: " + ct.getName() + " - Roll No: "+ct.getRollno() + " - Mobile No: " + ct.getMobile() + " - Student USN: " + ct.getUsn() + " - Semester: " + ct.getSemester()+" -Course: "+ct.getCourse());
System.out.println("");
studentsListCourse.remove(ct);
}
}
if(flag1==0) {
System.out.println("Enter Roll No Did Not Enroll Only");
}


break;
case 6:
for (int j = 0; j < studentsListCourse.size(); j++)
{

Course ct = studentsListCourse.get(j);
System.out.println("Information of Student : " + (j + 1)); 
System.out.println("");
System.out.println("Name: " + ct.getName() + " - Roll No: "+ct.getRollno() + " - Mobile No: " + ct.getMobile() + " - Student USN: " + ct.getUsn() + " - Semester: " + ct.getSemester()+"-Course:"+ct.getCourse());
System.out.println("");

}
break;
case 7:
System.out.println("THANKS FOR VISTING");
System.exit(0);
break;
default:
System.out.println("Enter A Valid Option");

}
}   
}

}

Credit: Shubham

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Sixth week Term Work Program 4

Question:
Write a Java program to that simulates copy command.

Solution:
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

// file streams (STREAMS)
public class program {
public static void main(String[] args)  {
FileInputStream fin=null;
FileOutputStream fout=null;
int num;
try {
fin=new FileInputStream(args[0]);
fout=new FileOutputStream(args[1]);
while((num=fin.read())!=-1) {
fout.write(num);
System.out.print((char)num);
}

}catch(Exception e) {
e.printStackTrace();

}
finally {
System.out.println();
if(fin!=null)
try {
fin.close();
} catch (IOException e) {
e.printStackTrace();
}
if(fout!=null)
try {
fout.close();
}catch(Exception e) {
e.printStackTrace();

}
}

}

}

Output:

//Command Line Argument

123456789000111 My name Khan And I am not A hero.

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Sixth Week Term Work Program 3 [ IA-1 2 B) ]

Question:
Write a Java program the implements a generic sort method using any of the sorting techniques.

public class GenericSorting {
//Modification: Sorting Wrt To String Length.
public static <T extends Comparable<T>> void sortingMethod1(T array[])
   {
   int i,j,n;
   n=array.length;
   for(i=0;i<n;i++)
   for(j=0;j<n-i-1;j++)
   if((((String) array[j]).length())>((String) array[j+1]).length())
   {
   T temp;
   temp=array[j];
   array[j]=array[j+1];
   array[j+1]=temp;
   }
   
   for(T element: array)
  System.out.printf("%s ", element);
   System.out.println();
   }

   public static <T extends Comparable<T>> void sortingMethod(T array[])
   {
   int i,j,n;
   n=array.length;
   for(i=0;i<n;i++)
   for(j=0;j<n-i-1;j++)
   if(array[j].compareTo(array[j+1])>0)
   {
   T temp;
   temp=array[j];
   array[j]=array[j+1];
   array[j+1]=temp;
   }
   
   for(T element: array)
  System.out.printf("%s ", element);
   System.out.println();
   }
   public static void main(String args[])
   {
   Integer i[]={3,2,1,7,6};
           String s[]={"pear","orange","apple"};
   sortingMethod(i);
 sortingMethod(s);
 
 System.out.println("\nSorting As per String Length");
 sortingMethod1(s);
 
   }
}

Output:
1 2 3 6 7 
apple orange pear 

Sorting As per String Length

pear apple orange 

Blue Marked Are Modification Asked By Ma'am In B1 Batch.

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Sixth Week Term Work Program 1 [ IA-1 3 A) ]

Question:
 Write a Java program to create the below-mentioned Student record using appropriate
Collection class to perform the following operations on a single student:
a. Add a student
b. Display all the details of the student
c. Delete/remove student record
Members of the class Student is given below:

Student
name
USN
division
CGPA


Solution:
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Scanner;
public class SingleStudentRecord {
 ArrayList<Comparable> stud=new   ArrayList<Comparable>(4);
static Scanner in=new Scanner(System.in);
public void EnterRecord() {
System.out.print("Enter The Name:");
stud.add(in.next());
System.out.println();
System.out.print("Enter The USN:");
stud.add(in.next());
System.out.println();
System.out.print("Enter The Division:");
stud.add(in.next());
System.out.println();
System.out.print("Enter The CGPA:");
stud.add(in.nextFloat());
System.out.println();
}
public void DisplayRecord() {
Iterator<Comparable> itr=stud.iterator();
while(itr.hasNext()) {
System.out.println(itr.next());
}        

}
public void DeleteRecord() {
System.out.println("Deleted The Student Record");
stud.removeAll(stud);
}
public static void main(String[] args) {
SingleStudentRecord s=new SingleStudentRecord();
int choice;
int i=0;
    while (true) {
        System.out.println("\n\n*******************STUDENT RECORD*******************\n");
        System.out.println("1. Enter Student Record");
        System.out.println("2. Display Record");
        System.out.println("3. Delete Record");
        System.out.println("4. Exit");
        System.out.println("Enter choice: ");
        choice = in.nextInt();
        switch (choice) {
        case 1: if(i==0)
        {
        s.EnterRecord();
        i++;
        }
        else {
        System.out.println("U Can Store Only One Student Record");
        }
                break;
        case 2:
        if(i==1)
        {
        s.DisplayRecord();
        }
        else {
        System.out.println("No Record Exists");
        }
        break;
        case 3:if(i==1) {
        s.DeleteRecord();
        i--;
        }
        else {
        System.out.println("No Record To delete");
        }
        break;
        case 4:
        System.out.println("THANKS FOR VISTING");
        System.exit(0);
        break;
        default:
        System.out.println("Enter A Valid Option");

}
}
}
}

Output:

**********STUDENT RECORD**********

1. Enter Student Record
2. Display Record
3. Delete Record
4. Exit
Enter choice: 
1
Enter The Name:Amit

Enter The USN:2Sd16cs012

Enter The Division:B

Enter The CGPA:8.4


Enter choice: 
2
Amit
2Sd16cs012
B
8.4


Enter choice: 
3
Deleted The Student Record


Enter choice: 
4
THANKS FOR VISTING

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