How to declare an array of different data types
arrays, java
Solution
ALL objects in Java extend Object.
Therefore it is possible to be completely non-descriptive when you create the array by declaring it an array of Objects:
Object[] arr = new Object[6];
This code creates an array of objects of length 6.
So for instance, you could create an array where entries come in pairs of two. In this case, the first object is a String and the second is an Integer.
Object[] arr = new Object[6];
arr[0] = new String("First Pair");
arr[1] = new Integer(1);
arr[2] = new String("Second Pair");
arr[3] = new Integer(2);
arr[4] = new String("Third Pair");
arr[5] = new Integer(3);
Now if you want to actually figure out what these objects are then it will require a cast:
int x = (Integer)arr[1];
Problem
I am working with arrays in Java and I have got a question. I know that an array in Java is a collection of similar data types, as shown below: ``` int[] x = new int[]{1,2,3}; ``` The above declaration can be read as an `Integer` array which is a collection of integer types. Consider this: ``` Object[] x = new Object[]{1,2,3,"srk"}; ``` Here, can I say that the above is an array which is a collection of dis-similar data types, or is it an `Object` array of similar data types, i.e. objects? I am muddled and skeptical about this. In Java, is it possible to create an array or any sort of collection which can hold different data types?