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Java 8 optional: ifPresent return object orElseThrow exception

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花落未央
花落未央 2020-12-03 09:17

I\'m trying to make something like this:

 private String getStringIfObjectIsPresent(Optional object){
        object.ifPresent(() ->{
               


        
      
      
      

        

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                 既然无缘 
              
              
    
                
                   既然无缘
                                             
                
                
                (楼主)
            
              
                  
    
                2020-12-03 10:05
              
    

            
    
            
    
              
              

    I'd prefer mapping after making sure the value is available
    


    private String getStringIfObjectIsPresent(Optional object) {
   Object ob = object.orElseThrow(MyCustomException::new);
    // do your mapping with ob
   String result = your-map-function(ob);
  return result;
}



    or one liner
    


    private String getStringIfObjectIsPresent(Optional object) {
   return your-map-function(object.orElseThrow(MyCustomException::new));
}

    
    
             
    
                                                        
    
            
            
    
              
                
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