Skip to main content

Priority Queue implementation in java -Arrays

Priority Queue implementation in java -Arrays


Input:- 4,8,1,7,3,5
output:-8,7,5,4,3,1,



package com.problems.heap;

public class Priority_Queue {

 public int[] priority_Queue(int arr[],int N)
 {
  int[] newarray=new int[N];
  
  for(int i=0;i<N;i++)
  {
   System.out.println(i+"priority_Queue"+arr[i]);
   insert(newarray,N,arr[i]);
  }
  return newarray;
 }
 
 //inserting new element in array
 public void insert(int Arr[],int N,int a)
 {
  for(int i=0;i<N;i++)
  {
   System.out.println("insert");
   // search for the correct position in array
   if(a>Arr[i])
   {
    System.out.println("call insertAtThis");
    Arr=insertAtThis(Arr,N,a,i);
    break;
   }
  }
 }
 
 //insert and swap
 public int[] insertAtThis(int arr[],int N,int a,int index)
 {
  System.out.println("insertAtThis");
  System.out.println("index"+index);
  int j=index;
  N=N-1;
  while(N!=index)
  {
   arr[N]=arr[N-1];
   N--;
   
  }
  
  arr[index]=a;
  print(arr);
  return arr;
  
 }
 
 //print function
 public void print(int Elemmm[])
 {
  for(int i=0;i<Elemmm.length;i++)
  {
   
   System.out.print(Elemmm[i]+",");
   
  }
  System.out.println("");
 }
 
 
 public static void main(String[] args) {
  // TODO Auto-generated method stub
 Priority_Queue func=new Priority_Queue();
  int Elemmm[]={4,8,1,7,3,5};
  System.out.println("");
  System.out.println("priority queue");
  Elemmm=func.priority_Queue(Elemmm, Elemmm.length);
  System.out.println("");
  func.print(Elemmm);
 }

}

Comments

.

Popular posts from this blog

How to design a Node in Tree?

How to design a Node in Tree?

There are three main components of a tree in a node.

 1) Integer holding data.
2) Left pointer holding node in a left subtree.
3) Right pointer holding node in a right subtree.

The following design is having data of int type and left,right pointers of a node to the subtrees.


package com.BST;publicclassNode{int data; Node left; Node right;/** * @return the data */publicNode(int data){this.left=null;this.right=null;this.data=data;}publicintgetData(){return data;}/** * @param data the data to set */publicvoidsetData(int data){this.data= data;}/** * @return the left */public Node getLeft(){return left;}/** * @param left the left to set */publicvoidsetLeft(Node left){this.left= left;}/** * @return the right */public Node getRight(){return right;}/** * @param right the right to set */publicvoidsetRight(Node right){this.right= right;}/* (non-Javadoc) * @see java.lang.Object#toString() */@Overridepublic String toString(){return"Node [data=&quo…

basics of java in layman term for beginner

Basics of java in layman term for beginner
What is an object ?

object is a real world entity.

Object is an instance of the class.It means something that is alive. Let us take an example of CAR:-

concept of a car is class. I mean we all know that it is having four tyres , one engine , four doors , a seat e.t.c. but we can't do anything just by the concept we need real Car to perform operations on it . This real car is what we call is an object.


Explain about main()method in java ?

main() method is an entry point of a program.
public static void main(String[] args)

Why main()method is public, static and void in java ?

public: It can be accessed from anywhere.
static: no class object need to call this method.
void: it is not returning anything in back.

What is JIT compiler ?

JIT is just in time compiler.JIT compiler runs after the program has started and compiles the code (usually bytecode or some kind of VM instructions) on the fly (or just-in-time, as it's called) into a form that's usu…