Java ArrayList replace at specific index

Question

I need help with this java please  I created an ArrayList of bulbs  and I m trying to replace a bulb at specific index with another bulb  So with the following heading  how do I proceed   public void replaceBulb int index  Bulbs theBulb

User · Answer

Lets get array list as ArrayList and new value as value all you need to do is pass the parameters to  set method  ArrayList set index value  Ex - ArrayList set 10  quot new value or object quot

User · Answer

We can replace element in arraylist using ArrayList Set   method We are a example for this as below  Create Arraylist  ArrayList lt String gt  arr   new ArrayList lt String gt      arr add  quot c quot     arr add  quot php quot     arr add  quot html quot     arr add  quot java quot     Now replcae Element on index 2  arr set 2  quot Mysql quot     System out println  quot after replace arrayList is    quot    arr    OutPut    after replace arrayList is    c  php  Mysql  java   Reference   Replace element in ArrayList

User · Answer

public void setItem List lt Item gt  dataEntity  Item item        int itemIndex   dataEntity indexOf item       if  itemIndex    -1            dataEntity set itemIndex  item

User · Answer

Check out the set int index  E element  method in the List interface

User · Answer

Use the set   method  see doc  arraylist set index newvalue

User · Answer

You can replace the items at specific position using set method of ArrayList as below   list set  your index  your item      But the element should be present at the index you are passing inside set   method else it will throw exception

User · Answer

Use ArrayList set

[java] Java ArrayList replace at specific index

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