A man subjected to a one-punch attack that left him in hospital has slammed the ‘double standards’ of the court after she was fined just $800 for the assault.

Madeline Shay Ryan, 24, pleaded guilty to the unprovoked attack on Jake Gould, 23, inside a bar at Caloundra, in south-east Queensland, on October 6 last year.

Mr Gould was taken to hospital with a severely bloodied and bruised face - but in court on Thursday, a judge decided not to convict Ryan, a student nurse.

That decision has outraged Mr Gould, who told Daily Mail Australia he believes that if he had hit a woman he would have been sent to jail.

Madeline Shay Ryan (pictured) pleaded guilty to assaulting Jake Gould inside a nightclub last year. She was ordered to pay an $800 fine, as well as $500 compensation to her victim

Victim Jake Gould (pictured) was left with a severely bloodied and bruised face, but in court on Thursday a judge decided not to convict his attacker - something he says is a double standard

'If I had defended myself in the slightest I would've been attacked by other patrons in the club and arrested immediately,' Mr Gould said.

'We have these strict one-punch laws, but she has walked away with a fine and has to pay me $500 compensation, but she hasn't even apologised.

'It's not about the money, I just think she should be held accountable for her actions, because if the shoe was on the other foot I would have been locked up immediately.

'The judge missed a great opportunity to tell the community no matter if it's a man hitting a man, a man hitting a woman, or a woman hitting a man, it's not acceptable.'

Ryan's unprovoked attack on Mr Gould came after a brief interaction in the nightclub precinct of the Caloundra Hotel about 2.55am.

CCTV footage showed the moment Ryan - who had drunk a 'large amount of alcohol' - approached Mr Gould as he walked out of a toilet.

The unprovoked attack occurred about 2.55am on Friday, October 6 in the nightclub precinct of the Caloundra Hotel (pictured)

'The judge missed a great opportunity to tell the community no matter if it's a man hitting a man, a man hitting a woman, or a woman hitting a man, it's not acceptable,' Mr Gould said of Ryan's attack

It was claimed that Ryan (pictured on another night) doesn't normally drink and on that night she consumed a large amount of alcohol

She then asked him if there was a man wearing a blue hat in the bathroom, and when Mr Gould replied 'yep' she began bashing him on the left side of his face.

Ryan's lawyer Remy Kurz told the Caloundra Magistrates Court his client's attack was 'out of character', the Sunshine Coast Daily reported.

Mr Kurz also told the court that if a conviction was recorded against Ryan it would be potentially damaging to her prospects of joining the Royal Flying Doctor service.

'She doesn't normally drink, on the night she consumed a large amount of alcohol and had been celebrating moving up to the Coast to join her partner,' Mr Kurz said.

But Mr Gould disputed several of the lawyer's comments, claiming that on Facebook his attacker was regularly out drinking and that she had never apologised to him.

'She's not remorseful, she hasn't even said sorry, I'd just love to know why the judge gave her that sentence,' Mr Gould said.

'She's not remorseful, she hasn't even said sorry, I'd just love to know why the judge gave her that sentence,' Mr Gould (pictured with a friend) said

Ryan's lawyer claimed a conviction could affect her chances of graduating from the University of Newcastle (pictured) and achieving her dream of joining the Royal Flying Doctor Service

'It (the attack) has definitely taken a toll on me.

'She's a very ordinary looking girl, so now whenever I go down the street I'm worried that when I come across someone who is looking at me strange that it might be her.'

Ryan pleaded guilty to assault occasioning bodily harm and was fined $800.

She was also ordered to pay Mr Gould $500 compensation or face five days behind bars.

Magistrate Stephanie Tonkin did not record the conviction.