How to initialize an array in Java?
data[10] = {10,20,30,40,50,60,71,80,90,91};
The above is not correct (syntax error). It means you are assigning an array to data[10]
which can hold just an element.
If you want to initialize an array, try using Array Initializer:
int[] data = {10,20,30,40,50,60,71,80,90,91};// orint[] data;data = new int[] {10,20,30,40,50,60,71,80,90,91};
Notice the difference between the two declarations. When assigning a new array to a declared variable, new
must be used.
Even if you correct the syntax, accessing data[10]
is still incorrect (You can only access data[0]
to data[9]
because index of arrays in Java is 0-based). Accessing data[10]
will throw an ArrayIndexOutOfBoundsException.
When you create an array of size 10 it allocated 10 slots but from 0 to 9.This for loop might help you see that a little better.
public class Array { int[] data = new int[10]; /** Creates a new instance of an int Array */ public Array() { for(int i = 0; i < data.length; i++) { data[i] = i*10; } }}