PlantUML class diagram example

@startuml

'''' Declarations for title, caption, etc ''''


'''' Declarations to stylize the diagram ''''
hide circle



skinparam classFontStyle bold

skinparam classAttributeIconSize 0


'''' Attributes and methods '''


class BattleshipGame {
    - inputboard : ArrayList<ArrayList>
    
    <<constructor>> BattleshipGame()
    +playgame(board:board,player:player)

}

class Board {
    
    - virtualboard : ArrayList<ArrayList>
    - ships : ArrayList<ship>
    - traps : ArrayList<trap>
    - potions : ArrayList<potion>

    <<constructor>> Board(ship:int,trap:int,potion:int)
    +createboard() : ArrayList<ArrayList>
    +createships(num:int)
    +createtraps(num:int)
    +createpotions(num:int)
    +isoverlap(temp:potion) : boolean
    +getship() : ArrayList<ship>
    +gettrap() : ArrayList<trap>
    +getpotion() : ArrayList<potion>
    +getvirtualboard() : ArrayList<ArrayList>
    +displayboard(board : ArrayList<ArrayList>)
    
}


class Player {
    - live : int
    - steptaken : int
    - inputx : int
    - inputy : int
    - shipfound : int
    
    <<constructor>> Player()
    +getsteptaken() : int
    +addstep()
    +setlive(l:int)
    +getlive() : int
    +getshipfound() : int
    +setshipfound()
}

class Potion {
    - y : int
    - x : int
    - length : int
    - isused : boolean

    <<constructor>> Potion()
    +gety() : int
    +sety(y:int)
    +getx(i:int) : int
    +getlength() : int
    +isused() : boolean
    +setused()
}

class Ship {
    -posx : ArrayList<Object>
    -posy : int
    -length : int
    -sunken : boolean
    
    <<constructor>> Ship()
    +setposition(len:int)
    +setsunken()
    +getx(i:int) : int
    +gety() : int
    +getposx() : ArrayList<Object>
    +issunken() : boolean
    +getlength() : int
    +generateposition(x:int,y:int,len:int)

}

class Trap {
    - lives : int
    - y : int
    - x : int
    - reveal : boolean
    
    <<constructor>> Trap()
    +gety() : int
    +getx(i:int) : int
    +revealed()
    +isrevealed() : boolean
    +getlive() : int
    +getlength() : int
    
}

class ShipRevealPotion {
    <<constructor>> ShipRevealPotion()
    +revealship(temp:ArrayList<ship>, board:ArrayList<ArrayList>)
}

class LifeSaverPotion {
    <<constructor>> LifeSaverPotion()
    + reveal()
}

class TrapRevealPotion {
    <<constructor>> TrapRevealPotion()
    + revealtrap(temp:board, board:ArrayList<ArrayList>)
}

BattleshipGame "1" *-- "1" Board
BattleshipGame "1" *-- "1" Player

Board "1" *-- "20..80" Ship
Board "1"  *-- "10..30" Trap
Board "1"  *-- "0..18" Potion

Potion <|-- ShipRevealPotion
Potion <|-- LifeSaverPotion
Potion <|-- TrapRevealPotion



@enduml