Question

It’s been a while since my data structures class and I’m having a hard time figuring this one out. I know that if I want to get the value from an ArrayList of Object[] I can use

nameOfArrayList.get(row)[col];

but I can’t seem to figure out, or find on the web, how to set a value.

Would I have to create a new object and set it to nameOfArrayList.get(row), alter the value and then use

nameOfArrayList.set(row,Object[])?

Answer 1

Try this:

nameOfArray.get(row)[col] = ...;

This sets a new value at index col of the array at index row in the nameOfArray ArrayList.

If you want to put a new array into nameOfArray at position row, try this:

nameOfArray.set(row, new Object[]);

This creates a new array of objects and puts it under index row in nameOfArray. See ArrayList.set().