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How do I remove repeated elements from ArrayList?

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难免孤独
难免孤独 2020-11-21 06:24

I have an ArrayList, and I want to remove repeated strings from it. How can I do this?

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  • 佛祖请我去吃肉
    佛祖请我去吃肉 (楼主)
    2020-11-21 06:45 

    public Set findDuplicates(List list) {
        Set items = new HashSet();
        Set duplicates = new HashSet();
        for (Object item : list) {
            if (items.contains(item)) {
                duplicates.add(item);
                } else { 
                    items.add(item);
                    } 
            } 
        return duplicates;
        }

    
    
             
    
                                                        
    
            
            
    
              
                
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