Arrays

• arrays are Java objects
• all Java arrays are technically one-dimensional. Two-dimensional arrays are arrays of arrays.
• declaring an array does not create an array object or allocate space in memory; it creates a variable with a reference to an array
• array variable declarations must indicate a dimension by using [] 

 // declares an array of integers
        int[] anArray;

        // allocates memory for 10 integers
        anArray = new int[10];

Accessing Arrays 

         int arrval[]= new int[10];
  ArrayList<Object> arrList= new ArrayList();
  
  for (int a: arrval) {
   
   
  }
  for (Object obj : arrList) {
   
  }