please solve this for me, and tell me why invoking the printArray method for d1 will cause nullPointerException while it should print 0 0 0 0 which they are the default values for the objects in the empty array?

public class MainClass { public static void main(String[] args) { int[] array1 = {10,20,30); double () array2 - (0.5, 1.5, 2.5); Data di = new Data(); Data d2 - new Data("WXYZ", array1, array2); Data d3 = new Data(50, 10.8, array2); d1.printSingleData(); d1.printArrayData(); d2.printSingleData(); d2.printArrayData(); d3.printSingleData(); d3.printArrayData(); array1 [0]=1000; array2[0]=1000; d2.printArrayData(); 3 class Data { String letters - "ABC"; int integer Number; double floatingNumber = 5.5; int] intArray; double [] doubleArray = new double[5); Data 0 intArray = new int[4]; } Data(int integer, double floating, double[] doubles) intArray = new int[2]; for(int i=0; i