How do i create a list of Objects in Java

Try this.

List<MarkerCustom> myList=new ArrayList<MarkerCustom>();
MarkerCustom entry1=new MarkerCustom(myInt, myString, myBitmap);
MarkerCustom entry2=new MarkerCustom(myInt, myString, myBitmap);

myList.add(entry1);
myList.add(entry2);

Shorthand:

List<MarkerCustom> markerList = Arrays.asList(
    new MarkerCustom(1, "hello", bitMapData1),
    new MarkerCustom(66, "johnHandy", bitMapData2))
};