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                            ## 2.2 函數式接口
如第1章所描述，函數式接口**有且只有一個方法**，Java API中有幾個常見的函數式接口：`Comparator`、`Runnable`、`Callable`。本節的內容是先介紹三個函數式接口，后面會給出一個Java 8常見函數式接口的列表。

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以下是Java 8中的一些函數式接口。
- `Predicate<T>`：接收T，返回boolean
- `Consumer<T>`：接收T，無返回值
- `Function<T, R>`：接收T，返回R
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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