import java.util.*;
public class Queue{
int[] arr;
int top;
int begin;
public Queue(int size){
this.arr = new int[size];
this.top = -1;
this.begin = -1;
System.out.println("The Queue has created with the size:"+ size);
}
public boolean isFull(){
if(top == arr.length-1){
return true;
}else{
return false;
}
}
public boolean isEmpty(){
if (begin == -1 || begin == arr.length){
return true;
}else{
return false;
}
}
public void enq(int value){
if(isFull()){
System.out.println("The Queue is Full");
}
else if(isEmpty()){
begin = 0;
top++;
arr[top] = value;
System.out.println(value+" is successfully inserted.");
}
else{
top++;
arr[top] = value;
System.out.println(value+ " is successfully inserted");
}
}
public static void main(String[] args){
Queue q = new Queue(5);
q.enq(1);
q.enq(2);
q.enq(3);
q.enq(4);
q.enq(5);
}
}
with help arrays shape and structure create a full video of the line by line execution of the full code as per the Java developer kit and
“Understanding Queue Implementation in Java (with Enqueue Operation)”
📜 Narration Script:
[Scene 1: Intro - 15s]
“Welcome! In this video, we’ll walk through a simple Java program that implements a Queue using arrays. This is a fundamental data structure following the First-In, First-Out (FIFO) principle, used in tasks like print scheduling, task processing, and more.”
[Scene 2: Class Setup - 30s]
“Let’s begin by creating a Queue class. We define an array to hold the queue elements and use two pointers: top and begin to keep track of insertions and deletions. Initially, both are set to -1.”
[Scene 3: Constructor Logic - 20s]
“The constructor initializes the array with a fixed size passed at runtime. We also print a confirmation that the queue was successfully created.”
[Scene 4: isFull() & isEmpty() - 30s]
“The isFull() method checks if the queue is full — if top reaches the last index.
The isEmpty() method returns true if begin is -1 or equal to array length, meaning there are no active elements in the queue.”
[Scene 5: enq() Method - 45s]
“The enq() method inserts a value into the queue.
If the queue is full, it prints a message.
If it’s empty, it resets the begin pointer to zero and inserts the element.
Otherwise, it just increments top and places the value at that position.”
[Scene 6: Main Method Execution - 45s]
“In the main() method, we create a queue of size 5 and insert the numbers 1 through 5 using enq().
You’ll see the array filling up with each successful insertion.
At the end, if we attempt to insert a sixth element, the queue would report that it’s full.”
[Scene 7: Summary & Next Steps - 25s]
“This was a simple implementation of a queue using arrays. You’ve learned how insertion works with checks for full or empty states.
In the next video, we could extend this to handle deletion using a dequeue() method. See you next time!”
🎨 Visual Instructions:
Scene Background: Whiteboard or IDE-style theme
Color Palette:
Background: White/light gray
Code text: Black with color highlights (blue for keywords, green for strings, etc.)
Font: Fira Code or Consolas (monospaced)
Visuals to Include:
A dynamic 1D array with index numbers (0 to 4)
Arrows showing top and begin moving during insertions
Pop-ups of Java System.out.println() output at bottom of screen
Transitions: Slide-in or zoom-in for each code snippet block
Extra Visual Features:
Animate "Queue is Full" warning in red text when size exceeds
视频信息
答案文本
视频字幕
Welcome! In this video, we'll walk through a simple Java program that implements a Queue using arrays. This is a fundamental data structure following the First-In, First-Out principle, used in tasks like print scheduling, task processing, and more.
Let's begin by creating a Queue class. We define an array to hold the queue elements and use two pointers: top and begin to keep track of insertions and deletions. Initially, both are set to negative one. The constructor initializes the array with a fixed size passed at runtime.
The constructor initializes the array with a fixed size passed at runtime. We also print a confirmation that the queue was successfully created. This gives us a fixed-size array with both tracking pointers initially set to negative one.
The isFull method checks if the queue is full — if top reaches the last index. The isEmpty method returns true if begin is negative one or equal to array length, meaning there are no active elements in the queue.
The enq method inserts a value into the queue. If the queue is full, it prints a message. If it's empty, it resets the begin pointer to zero and inserts the element. Otherwise, it just increments top and places the value at that position.
In the main method, we create a queue of size 5 and insert the numbers 1 through 5 using enq. You'll see the array filling up with each successful insertion. Let's watch this step by step.
This was a simple implementation of a queue using arrays. You've learned how insertion works with checks for full or empty states. In the next video, we could extend this to handle deletion using a dequeue method. See you next time!
Let's begin by creating a Queue class. We define an array to hold the queue elements and use two pointers: top and begin to keep track of insertions and deletions. Initially, both are set to negative one. The constructor initializes the array with a fixed size passed at runtime.
The constructor initializes the array with a fixed size passed at runtime. We also print a confirmation that the queue was successfully created. This gives us a fixed-size array with both tracking pointers initially set to negative one.
The isFull method checks if the queue is full — if top reaches the last index. The isEmpty method returns true if begin is negative one or equal to array length, meaning there are no active elements in the queue.
In the main method, we create a queue of size 5 and insert the numbers 1 through 5 using enq. You'll see the array filling up with each successful insertion. Let's watch this step by step as the pointers move and values are placed.