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Java Array

Array Store Exception

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by , 03-04-2012 at 11:18 AM (3023 Views)
If array variable v consists of type A[] (where A is a reference type) then v might hold a reference to any array type B[] instance.( provided that B could be assigned to A).

Java Code:
class Point { int x, y; }
class ColoredPoint extends Point { int color; }
class Test {
	public static void main(String[] args) {
		ColoredPoint[] cpa = new ColoredPoint[10];
		Point[] pa = cpa;
		System.out.println(pa[1] == null);
		try {
			pa[0] = new Point();
		} catch (ArrayStoreException e) {
produces the output:

Variable pa has type Point[].Variable cpa has its value a reference, to an object of type ColoredPoint[]. To a point, a ColoredPoint could be assigned; hence to pa, the value of cpa can be assigned.

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Updated 03-04-2012 at 11:21 AM by Java Array