int[] cannot be converted to Iterator | Together Java | Page 1

silk fossil Jul 9, 2023, 1:49 PM

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The error I get is: FClass.java:53: error: incompatible types: int[] cannot be converted to Iterator Iterator i = sObj.get_Iterator(); => 1 error
I will provide the code for better context, and all I can add is that I need a way to make an Iterator Object and return it.
import java.util.*;

interface Iterator{
public boolean has_next();
public Object get_next();
}

class Sequence{
private final int maxLimit = 80;
private SeqIterator _iter = null;
int[] iArr;
int size;
Sequence(int size){
this.size = size;
}
//implement addTo(elem) to add an int elem to the sequence
public void addTo(int elem){
iArr[iArr.length - 1] = elem;
}
//implement get_Iterator() to return Iterator object
public int[] get_Iterator(){
return iArr;
}
private class SeqIterator implements Iterator{
int indx;
public SeqIterator(){
indx = -1;
}
//implement has_next()
public boolean has_next(){
indx = indx + 1;
if(indx+1 <= size-1){
return true;
}
else{
return false;
}
}
//implement get_next()
public Object get_next(){
return iArr[indx];
}
}
}

class FClass{
public static void main(String[] args) {
Sequence sObj = new Sequence(5);
Scanner sc = new Scanner(System.in);
for(int i = 0; i < 5; i++) {
sObj.addTo(sc.nextInt());
}
Iterator i = sObj.get_Iterator();
while(i.has_next())
System.out.print(i.get_next() + ", ");
}
}

mellow fableBOT Jul 9, 2023, 1:49 PM

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

mellow fableBOT Jul 9, 2023, 1:49 PM

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

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mellow fableBOT Jul 9, 2023, 2:09 PM

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int[] cannot be converted to Iterator

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Changed the title to int[] cannot be converted to Iterator.

mellow fableBOT Jul 9, 2023, 2:09 PM

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silk fossil The error I get is: FClass.java:53: error: incompatible types: int[] cannot be ...

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Formatted code

The error I get is : FClass.java : 53 : error : incompatible types : int [] cannot be converted to Iterator Iterator i = sObj.get_Iterator();
 =  > 1error I will provide the codefor better context, and all I can add is that I need a way to make an Iterator Object andreturn it.import java.util. * ; 
interface Iterator {
  public boolean has_next(); public Object get_next();
}
class Sequence {
  private final int maxLimit = 80;
  private SeqIterator_iter = null ;
  int [] iArr;
  int size;
  Sequence(int size) {
    this .size = size;
  }
  //implement addTo(elem) to add an int elem to the sequence 
  public void addTo(int elem) {
    iArr[iArr.length - 1]  = elem;
  }
  //implement get_Iterator() to return Iterator object
  public int [] get_Iterator() {
    return iArr;
  }
  private class SeqIterator implements Iterator {
    int indx;
    public SeqIterator() {
      indx =  - 1;
    }
    //implement has_next()
    public boolean has_next() {
      indx = indx + 1;
      if (indx + 1 <= size - 1) {
        return true;
      }
      else {
        return false;
      }
    }
    //implement get_next()
    public Object get_next() {
      return iArr[indx] ;
    }
  }
}
class FClass {
  public static void main(String[] args) {
    Sequence sObj = new Sequence(5);
    Scanner sc = new Scanner(System.in);
    for (int i = 0; i < 5; i++) {
      sObj.addTo(sc.nextInt());
    }
    Iterator i = sObj.get_Iterator();
    while (i.has_next()) System.out.print(i.get_next() + ", ");
  }
}

copper orbit Jul 9, 2023, 2:09 PM

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//implement get_Iterator() to return Iterator object
public int [] get_Iterator() {
return iArr;
}

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it literally says to return an iterator

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but u return int[]

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which is not an iterator

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hence the error

silk fossil Jul 9, 2023, 2:10 PM

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it does not work either

copper orbit Jul 9, 2023, 2:10 PM

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yeah bc of what i just said

silk fossil Jul 9, 2023, 2:10 PM

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I tried earlier

copper orbit Jul 9, 2023, 2:10 PM

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there are actually multiple issues in ur code and it feels like u dont really know what ur doing there. seems a bit wild west and trial&error

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u should probably step back and learn more about some basics

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anyways. ur get iterator method is supposed to return a sequence iterator instance

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not the array

silk fossil Jul 9, 2023, 2:14 PM

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yeah sorry. I dont know java, I do my work with python. This is the only time I have to do something with Java. Anyways thanks

fossil plinth Jul 9, 2023, 2:54 PM

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silk fossil The error I get is: FClass.java:53: error: incompatible types: int[] cannot be ...

as zabu said, you are supposed to return an iterator, an array is not an iterator

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also is this an assignment ?

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I don't know what you are doing

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but you created an interface called Iterator, but you also imported java.util.* which means that you know have two Iterator clashing

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this cannot work

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also hash_next shouldn't increemnt, but get_next should

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because has_next shouldn't have a side effect

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and instead of putting comments, please add the override annotation

silk fossil Jul 9, 2023, 2:57 PM

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fossil plinth also is this an assignment ?

yes, I cannot edit most of the code

fossil plinth Jul 9, 2023, 2:58 PM

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and the naming is wrong, it should be camelCase, not snake_case

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indx+1 <= size-1
and this condition is wrong

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and you shouldn't return Object

fossil plinth Jul 9, 2023, 3:00 PM

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silk fossil yes, I cannot edit most of the code

what can you not edit ?

silk fossil Jul 9, 2023, 3:00 PM

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till int size and none of Fclass

fossil plinth Jul 9, 2023, 3:02 PM

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...ok

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well let's first fix the compilation error

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as zabu said, you are supposed to return an iterator, an array is not an iterator

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do you understand that ?

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@silk fossil

silk fossil Jul 9, 2023, 3:07 PM

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Well yes, kind of, Im still learning

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I get what I need to do

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Im unaware of the syntax

fossil plinth Jul 9, 2023, 3:07 PM

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silk fossil I get what I need to do

what do you need to do then ?

silk fossil Jul 9, 2023, 3:08 PM

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return an iterator object and make it work

fossil plinth Jul 9, 2023, 3:08 PM

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silk fossil return an iterator object and make it work

yes, so where is the iterator ?

silk fossil Jul 9, 2023, 3:09 PM

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there isn;t one

fossil plinth Jul 9, 2023, 3:09 PM

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there is

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you created its class

silk fossil Jul 9, 2023, 3:11 PM

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Seqiterator

fossil plinth Jul 9, 2023, 3:12 PM

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yes

silk fossil Jul 9, 2023, 3:21 PM

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Iterator get_Iterator() {
if (_iter == null) {
_iter = new SeqIterator();
}
return _iter;
}

fossil plinth Jul 9, 2023, 3:22 PM

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silk fossil Iterator get_Iterator() { if (_iter == null) { _iter = new S...

this should work

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but

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why assigning the iterator to itr 🤔

silk fossil Jul 9, 2023, 3:22 PM

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what do you mean

fossil plinth Jul 9, 2023, 3:33 PM

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silk fossil what do you mean

why are you assignming it to _itr ?

keen crater Jul 9, 2023, 3:48 PM

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import java.util.*;

interface Iterator{
    public boolean has_next();
    public Object get_next();
}

class Sequence{
    private final int maxLimit = 80;
    private SeqIterator _iter = null;
    int[] iArr; 
    int size;
    Sequence(int size){
        this.size = size;
    }
//implement addTo(elem) to add an int elem to the sequence 
    public void addTo(int elem){
        iArr[iArr.length - 1] = elem;
    }
//implement get_Iterator() to return Iterator object
    public int[] get_Iterator(){
        return iArr;
    }
    private class SeqIterator implements Iterator{
        int indx;
        public SeqIterator(){
            indx = -1;
        }
        //implement has_next()
        public boolean has_next(){
            indx = indx + 1;
            if(indx+1 <= size-1){
                return true;
            }
            else{
                return false;
            }
        }
        //implement get_next()
        public Object get_next(){
            return iArr[indx];
        }
    }
}

class FClass{
    public static void main(String[] args) {
        Sequence sObj = new Sequence(5);
        Scanner sc = new Scanner(System.in); 
        for(int i = 0; i < 5; i++) {
            sObj.addTo(sc.nextInt());
        }
        Iterator i = sObj.get_Iterator();
        while(i.has_next())
            System.out.print(i.get_next() + ", ");
    }
}

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sorry just highlighting so its easier to read

#int[] cannot be converted to Iterator