Comment créer un tableau JSON en Java

j'ai une structure JSON comme indiqué ci-dessous. Comment puis-je créer cette structure de tableau par programmation?

JSON srtucture:

{ 
"Employee": 
    [ 
      { 
        "EmP325235": 
          { 
             "Name":"Rekha_S", 
             "firstName":"Rekha", 
             "phoneWork":"788908909", 
             "lastName":"S", 
             "namePrefix":"Miss", 
             "phoneMobile":"3347687878", 
             "phoneHome":"5768900909", 
             "Email":"" 
          }, 
        "Em252555": 
          { 
             "Name":"Roopa_N", 
             "firstName":"Roopa", 
             "phoneWork":"0471245367", 
             "lastName":"N", 
             "namePrefix":"", 
             "phoneMobile":"", 
             "phoneHome":"", 
             "Email":"" 
      } 
      } 
    ], 
"User_Details": 
   { 
       "USER_ID":"7890", 
        "Number":"8585858585", 
        "Password":"Passwordsgs" 
   } 
}