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singly.java

@@ -0,0 +1,91 @@
+import java.util.*;
+class singly
+{
+	Node head=null;
+	Node end=null;
+	class Node{
+		int data;
+		Node link;
+		Node(int d){
+			data =d;
+			link=null;
+		}
+	}
+	public static void main(String ar[]){
+		singly s=new singly();
+		Scanner st=new Scanner(System.in);
+		int choice,in;
+		while(true){
+			System.out.println("\n"+"1.Insert at Front"+"\n"+"2.Delete at Front"+"\n"+"3.Insert at End"+"\n"+"4.Delete at End"+"\n"+"5.Delete element"+"\n"+"6.Exit");
+			choice=st.nextInt();
+			switch(choice){
+				case 1:System.out.println("Enter element to insert:");
+					   in=st.nextInt();
+					   s.insertFront(in);
+					   s.display();
+					   break;
+				// case 2:s.deleteFront();
+				// 	   s.display();
+				// 		break;
+				// case 3:System.out.println("Enter element to insert:");
+				// 	   in=st.nextInt();
+				// 	   s.insertEnd(in);
+				// 	   s.display();
+				// 	   break;
+				// case 4:s.deleteEnd();
+				// 	   s.display();
+				// 	   break;
+				// case 5:System.out.println("Enter pos:");
+				// 	   in=st.nextInt();
+				// 	   s.deletePos(in);
+				// 	   s.display();
+				// 	   break;
+				// case 6:System.out.println("Enter pos:");
+				// 	   in=st.nextInt();
+				// 	   s.search(in);
+				// 	   s.display();
+				// 	   break;
+				default:System.out.println("Incorrect Input.");
+						break;
+			}
+		}
+	}
+	public void insertFront(int info){
+		Node new_node=new Node(info);
+		if(head==null){
+			new_node.link=null;
+			head=new_node;
+
+		}
+		else{
+			new_node.link=head;
+			head=new_node;
+		}
+	}
+	public void insertEnd(int info){
+		Node new_node=new new_node();
+		if(new_node==null){
+			System.out.print("NO space");		
+		}
+		else{
+			new_node.data=info;
+			new_node.link=null;
+		}
+
+	}
+	public void display(){
+		if(head==null){
+			System.out.println("No elements are present");
+
+		}
+		else{
+			Node temp=head;
+			while(temp!=null){
+				System.out.print(temp.data+"->");
+				temp=temp.link;
+
+			}
+		}
+	}
+
+}