Question

Suppose I have an ArrayList containing Object[]{"Hello",10,abitmap} at index 0 and Object[]{"How are you?",20,bbitmap} at index 1

How can I get for example "Hello" from index 0?
How can I replace 20 by 15in index 1?

How can I fill all the third columns in the ArrayList by cbitmap using Collections.fill for example?

Thanks for your help.

Answer 1

Instead of having an Object [], create an inner class, such as:

private class ImageObject{
     private String name;
     private int size; 
     private BufferedImage bitmap;

  public ImageObject(String name, int size, BufferedImage bitmap){
     this.name = name;
     this.size = size;
     this.bitmap = bitmap;
  }

  public String getName(){ 
     return name; 
  }

  public int getSize(){ 
     return size; 
  }

  public BufferedImage getBitmap(){ 
     return bitmap; 
  }

  public void setName(String name){ 
     this.name = name; 
  }

  public void setSize(int size){ 
     this.size = size; 
  }

  public void setBitmap(BufferedImage bitmap){ 
     this.bitmap = bitmap; 
  }
}

Then, create your ArrayList like this:
ArrayList<ImageObject> objects = new ArrayList<ImageObject>();