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61 lines (49 loc) · 954 Bytes
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Copy pathQueue.java
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61 lines (49 loc) · 954 Bytes
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public class Queue {
private int rear,front;
private Object[] elements;
public Queue(int capacity) {
elements = new Object[capacity];
rear = -1;
front = 0;
}
public boolean isEmpty() {
return rear < front; // true döner
}
public boolean isFull() {
return (rear + 1 == elements.length); // trueeeeeeeeeeee
}
public void enqueue(Object data) {
if(isFull()) {
System.out.println("Queue is full!");
}
else {
rear++;
elements[rear] = data;
}
}
public Object dequeue() {
if(isEmpty()) {
System.out.println("Queue is empty!");
return null;
}
else {
Object retData = elements[front];
elements[front] = null;
front++;
return retData;
}
}
public Object peek() {
if(isEmpty()) {
System.out.println("Queue is empty!");
return null;
}
else {
Object retData = elements[front];
return retData;
}
}
public int size() {
return (rear - front + 1);
}
}