Hey! Im doing a school assignment and I want to add an object to an array.

[twin mango]

The object already exists in another array but i need to add it to another in case there are multiple instances which need to go into the new array.

                public void findOldest() {
        int oldest = 0;
        Person[] oldestPeople = new Person[5];
        for(int i = 0; i < groupie.length; i++)
        {
            if(groupie[i].getAge() >= oldest) {
                System.out.println(oldest);
                oldest = groupie[i].getAge();
            }
        }
        
        for(int i = 0; i < groupie.length; i++)
        {
            if(groupie[i].getAge() == oldest) {
                                //error below
                oldestPeople.add(groupie[i]);
            }
        }
    }

[candid chasm]

<@&987246399047479336> please have a look, thanks.

[candid chasm]

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be stored separately. How can I do that?

[analog epoch]

private Person[] groupie = new Person[5];
                public void findOldest() {
        int oldest = 0;
        Person[] oldestPeople = new Person[5];
        for(int i = 0; i < groupie.length; i++)
        {
            if(groupie[i].getAge() >= oldest) {
                System.out.println(oldest);
                oldest = groupie[i].getAge();
            }
        }

        for(int i = 0; i < groupie.length; i++)
        {
            if(groupie[i].getAge() == oldest) {
                                //error below
                oldestPeople.add(groupie[i]);
            }
        }
    }

[candid chasm]

Detected code, here are some useful tools:

Formatted code

private Person[] groupie = new Person[5] ;
public void findOldest() {
  int oldest = 0;
  Person[] oldestPeople = new Person[5] ;
  for (int i = 0; i < groupie.length; i++) {
    if (groupie[i] .getAge() >= oldest) {
      System.out.println(oldest);
      oldest = groupie[i] .getAge();
    }
  }
  for (int i = 0; i < groupie.length; i++) {
    if (groupie[i] .getAge() == oldest) {
      //error below
      oldestPeople.add(groupie[i] );
    }
  }
}

[analog epoch]

alright, now its readable 🙂

u cant .add to an array

arrays are fixed size structures

they cant change their size ever

u can only set one of the existing spots

array[index] = ...

if u want a structure that can grow and shrink, use Lists

[honest cove]

You can convert your array into list

Add the new item and convert it back to array

[twin mango]

ooooh you are right

im gonna do it with the index, my teacher told me we are gonna cover arraylists next week so ill save that for then

thank you guys:)

[honest cove]

👍