small error

[ayoood]

i wrote this code when i compile it i get this error so what is the solution??

java.lang.NoSuchMethodError: main
Exception in thread "main"
Process completed.

class MyQueue
{
private int[] arr;
private int head;
private int tail;
private int size;
private int count;
public MyQueue(int size)
{
arr = new int[size];
head = 0;
tail = 0;
count = 0;
this.size = size;
}
public void Enqueue(int value)
{
if(!IsFull())
{
arr[tail] = value;
tail = (tail + 1) % size;
count++;
}
}
public int Dequeue()
{
if (!IsEmpty())
{
int result = arr[head];
head = (head + 1) % size;
count--;
return result;
}
return 0;
}
public Boolean IsFull()
{
return count == size;
}
public Boolean IsEmpty()
{
return count == 0;
}
}

[Eranga]

Strange seems to me your code is fine. Lets add generics there.

Code:

private LinkedList<Object> list = new LinkedList<Object>();

[ayoood]

sorry i put the wrong programme this is my our programme and i get this error

[Eranga]

Code:

public class StackL {

    private LinkedList<Object> list = new LinkedList<Object>();

    public void push(Object v) {
        list.addFirst(v);
    }

    public Object top() {
        return list.getFirst();
    }

    public Object pop() {
        return list.removeFirst();
    }

    public static void main(String[] args) {
        StackL stack = new StackL();
        for (int i = 0; i < 10; i++)
            stack.push(new Integer(i));
        
        System.out.println(stack.top());
        System.out.println(stack.top());
        System.out.println(stack.pop());
        System.out.println(stack.pop());
        System.out.println(stack.pop());
    }
}

[ayoood]

this programme work with me i put the wrong programme now i upload the right programme so could you fig what the solution for this programme

[ayoood]

there is no body can fig what should i do my our code correct but iwhen i compile it i get that error
java.lang.NoSuchMethodError: main
Exception in thread "main"
Process completed.

[Eranga]

It's not a compilation error. It's a run time error. In your class there is no main method. So you can't runt it. Only thing you can do is compiling it.

[ayoood]

so what should i do to run it what method should i write it to rin the programme??

[Eranga]

Write the main method.

[ayoood]

sorry about that in me programme i should write public statice void main(String args[]); that you main ??????

[Eranga]

Yes it is. On that methods call the starting point on your written code.

[ayoood]

could you plz tell me in which line i put it

thank you for reply

[Eranga]

I don't know what is your requirement there. But the basis thing you have to do is this.

Code:

class MyQueue {
    private int[] arr;
    private int head;
    private int tail;
    private int size;
    private int count;

    public MyQueue(int size) {
        arr = new int[size];
        head = 0;
        tail = 0;
        count = 0;
        this.size = size;
    }

    public void Enqueue(int value) {
        if(!IsFull()) {
            arr[tail] = value;
            tail = (tail + 1) % size;
            count++;
        }
    }

    public int Dequeue() {
        if (!IsEmpty()) {
            int result = arr[head];
            head = (head + 1) % size;
            count--;
            return result;
        }
        return 0;
    }

    public Boolean IsFull() {
        return count == size;
    }

    public Boolean IsEmpty() {
        return count == 0;
    }
    
    public static void main(String[] args) {
        MyQueue mq = new MyQueue(10);
        
        mq.Enqueue(3);
        mq.Dequeue();
    }
}

[ayoood]

thank you for your help

[Eranga]

Is that what you looking?

[ayoood]

now it’s run with me but i didn’t get any value for output only process complete

[Eranga]

Because you don't have print any value to the console. What you want to get as output in your application?

[ayoood]

i would like to get 3

[Eranga]

What you mean 3. You want to print value 3. There is no meaning. To just print a number, what you have done here. From where you found this code.

[ayoood]

i get it from one sit but i don’t remember which sit