studentlinkedlist.java

java code student db

public class StudentLinkedList {
	private StudentNode head;
	private StudentNode tail;
	private int listSize;

	// getters, setters

    public StudentNode getHead() {
        return this.head;
    }

    public void setHead(StudentNode head) {
        this.head = head;
    }

    public StudentNode getTail() {
        return this.tail;
    }

    public void setTail(StudentNode tail) {
        this.tail = tail;
    }

    public int getListSize() {
        return this.listSize;
    }

    private void setListSize(int listSize) {
        this.listSize = listSize;
    }

    // constuctor

	public StudentLinkedList()
	{
        this.setHead(null);
        this.setTail(null);
        this.setListSize(0);
	}

    public StudentLinkedList(StudentNode sn)
	{
        this.addAtHead(sn);
	}

	public StudentLinkedList(Student st)
	{
        StudentNode sn = new StudentNode(st);
        this.addAtHead(sn);
    }

    public StudentLinkedList(Student[] studs)
	{
        int arSize = studs.length;

        for(int j = arSize-1; j >= 0; j--)
        {
            this.addAtHead(studs[j]);
        }
	}

    public void printList()
	{
        StudentNode tmp = this.getHead();
        while(tmp != null)
        {
            System.out.print("Roll No:");
            System.out.print(tmp.getStud().getRollNo());
            System.out.print(", ");
            System.out.print("Name:");
            System.out.print(tmp.getStud().getName());
            System.out.print(" and ");
            System.out.print("CGPA:");
            System.out.print(tmp.getStud().getCgpa());
            System.out.println();

            tmp = tmp.getNext();
        }
	}

    public void printList2()
	{
        int j;
        StudentNode tmp = this.getHead();

        for(j=1; j <= this.getListSize(); j++)
        {
            System.out.print("Roll No:");
            System.out.print(tmp.getStud().getRollNo());
            System.out.print(", ");
            System.out.print("Name:");
            System.out.print(tmp.getStud().getName());
            System.out.print(" and ");
            System.out.print("CGPA:");
            System.out.print(tmp.getStud().getCgpa());
            System.out.println();

            tmp = tmp.getNext();
        }
	}

    public void addAtHead(Student st)
    {
        StudentNode sn = new StudentNode(st);
        addAtHead(sn);
    }

    public void addAtHead(StudentNode sn)
    {
        sn.setNext(this.head);
        this.head = sn;
        this.setListSize(this.getListSize()+1);
    }

    public void addAtTail(Student st)
    {
    }

    public void addAtTail(StudentNode sn)
    {
    }

    public void insertAt(StudentNode sn, int position)
    {
    }

    public void insertBefore(StudentNode sn, int position)
    {
    }

    public void insertAfter(StudentNode sn, int position)
    {
    }

    public void insertAt(Student st, int position)
    {
    }

    public void insertBefore(Student st, int position)
    {
    }

    public void insertAfter(Student st, int position)
    {
    }

    public void replaceAt(Student st, int position)
    {
    }

    public void replaceAt(StudentNode sn, int position)
    {
    }

    public void removeAt(int position)
    {
    }

    public void trimRange(int begin, int end)
    {
    }

    public void trimAfter(int position)
    {
    }

    public void trimBefore(int position)
    {
    }

    public Student studentAt(int position)
    {
        return null;
    }

    public StudentNode studentNodeAt(int position)
    {
        return null;
    }

    public StudentLinkedList listFrom(int position)
    {
        return null;
    }



}