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JavaÄÚ²¿ÀࣨInner Class£©Ïê½â

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1         
Static member class£¨¾²Ì¬³ÉÔ±Àࣩ
ÀàÉùÃ÷Öаüº¬“static”¹Ø¼ü×ÖµÄÄÚ²¿Àà¡£ÈçÒÔÏÂʾÀý´úÂ룬
Inner1/Inner2/Inner3/Inner4¾ÍÊÇOuterµÄËĸö¾²Ì¬³ÉÔ±Àà¡£¾²Ì¬³ÉÔ±ÀàµÄʹÓ÷½Ê½ÓëÒ»°ã¶¥²ãÀàµÄʹÓ÷½Ê½»ù±¾Ïàͬ¡£
public
 class
  Outer{
    
//
just like static method, static member class has public/private/default access privilege levels
    
    
//
access privilege level: public 
    
public
 static
 class
 Inner1 {
        
public
 Inner1() {
            
//
Static member inner class can access static method of outer class
            staticMethod();    
            
//
Compile error: static member inner class can not access instance method of outer class
            
//
instanceMethod();  
        }
    }
    
    
//
access privilege level: default 
    
static
 class
 Inner2 {
        
    }
    
    
//
access privilege level: private 
    
private
 static
 class
 Inner3 {
      


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