How to tackle NoClassDefFoundError

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Java

Hi,
This is my first java program, and while compiling it is not throwing any error. But while executing it, I am getting NoClassDefFoundError. Below is my code:

class Myclass 
{
	static int x=10;
	static int y=20;

	public static void main(String[] args) 
	{
		
		display();
		System.out.println("Value of static variable x= "+x);
		System.out.println("Value of static variable y= "+y);
	}

	static void display()
	{
		System.out.println("This is a display method");
	}

}

Can someone plese look into it??
Thanks