protected Type(String name)
name - 新控制类型的名称。 
           public final boolean equals(Object obj)
equals在类别 
            Object 
           obj - 与之比较的参考对象。 
           true如果该对象与obj参数相同; 
            false否则。 
           Object.hashCode() , HashMap 
           public final int hashCode()
hashCode在类别 
            Object 
           Object.equals(java.lang.Object) , 
            System.identityHashCode(java.lang.Object) 
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