java - How to delete an object that are written into file? -


in program, user gives inputs , added arraylist. arraylist object written file. have created method writing , read file (using file-i/o & object-i/o stream).

now if want delete particular object file, how do that?

this part of workin on:

case 4:                 bankaccounts2=(list<bankaccount>)rw.readfromfile();//method calling; bankaccount class settre , getter                  iterator<bankaccount> it=bankaccounts2.iterator();//bankaccounts2 arraylist reading file                  system.out.println("enter account want delete:");                 deleteacc = sc.nextint();                  while (it.hasnext()) {                     bankaccount next = it.next();                     if (next.getaccnum() == deleteacc) {                         it.remove();                     }                 }                  break;

the easiest solution in mind read objects file arraylist. remove 1 want delete aforementioned list. finally, overwrite initial contents of file new contents in list.

if not want re-read contents of file , have reference list of objects in memory, can remove object , overwrite contents of file


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