1、权限访问修饰符 
    public,protected,default,private,private static final 修饰符四种级别private static final 修饰符修饰符都private static final 修饰符private static final 修饰符用来修饰类、方法和字段private static final 修饰符 

              包外         子类          包内           类内 
public      yes        yes          yes         yes 
protected   no         yes          yes         yes 
default     no         no           yes         yes 
private     no         no           no          yes 

    2、final修饰符 
    finalprivate static final 修饰符意思private static final 修饰符private static final 修饰符private static final 修饰符private static final 修饰符private static final 修饰符private static final 修饰符private static final 修饰符修饰类、字段、方法private static final 修饰符修饰类private static final 修饰符private static final 修饰符能被扩展(extends)private static final 修饰符private static final 修饰符private static final 修饰符private static final 修饰符能被继承private static final 修饰符修饰字段private static final 修饰符字段private static final 修饰符private static final 修饰符能被改变private static final 修饰符因此private static final 修饰符private static final 修饰符有final修饰字段private static final 修饰符应该对字段进行手动初始化private static final 修饰符修饰方法private static final 修饰符该方法private static final 修饰符能被改变private static final 修饰符private static final 修饰符private static final 修饰符重写private static final 修饰符 
     3、abstract修饰符 
     abstractprivate static final 修饰符抽象private static final 修饰符意思private static final 修饰符用来修饰类和方法private static final 修饰符修饰类private static final 修饰符private static final 修饰符该类private static final 修饰符抽象类private static final 修饰符private static final 修饰符能被实例化private static final 修饰符必需进行扩展private static final 修饰符修饰方法private static final 修饰符private static final 修饰符该方法private static final 修饰符抽象方法必须被子类重写(override)private static final 修饰符 
     4、static修饰符 
     static用来修饰内部类private static final 修饰符方法private static final 修饰符字段private static final 修饰符修饰内部类说明该内部类属于外部类而private static final 修饰符属于外部类private static final 修饰符private static final 修饰符实例private static final 修饰符修饰字段说明该字段属于类而private static final 修饰符属于类实例private static final 修饰符修饰方法说明该方法属于类而private static final 修饰符属于类实例
private static final 修饰符所说private static final 修饰符修饰符顺序private static final 修饰符没有区别private static final 修饰符

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