1. The size of an array is fixed; it can’t be increased or decreased. Some times. The memory may be wasted or memory may not be sufficient.
2. To perform the operations like Insertion, Deletion, Searching, Sorting etc. the program has to write there own logic.
3. Because of the problems in an array the java people or java s/w people java people have come it collection framework introduction java 1.2 versions.