null pointer exception

[Muhammad usman shad]

No error when compile it,
But it does not execute!!!
What is the solution???

 

class Initializing_Array
{
	int x;
	int y;
	String	z;
	
	int xx	=	10;
	int yy	=	20;

	public static void main(String args[])
	{
		Initializing_Array	obj	=	new Initializing_Array();
		obj.initialization();
	}
	
	public void initialization()
	{
		Initializing_Array[]	ia	=	new Initializing_Array[10];
//		Initializing_Array	ia[]	=	new Initializing_Array[10];

		for(int i=0;	i<10;	i++)
		{
			xx	=	xx+15;

			ia[i].x	=	xx;
			ia[i].y	=	yy;

			if(xx	==	70)
			{
				xx	=	10;
				yy	=	yy+15;
			}
		}
	}
}
   

[sujith Acharya]

Initializing_Array[] ia = new Initializing_Array[10];

You have created 10 reference of type Initializing_Array
It doesnt mean 10 objects of Initializing_Array.

So you have to create Object and assign to these refence, then only you able to set the values.

like

  
for(int i=0; i < ia.length; i++){
    ia[i] = new Initializing_Array();
}