下面类或者接口中,不属于Java集合体系的是 ( ) A: java.util.Collections B: java.util.Map C: java.util.Vector D: java.util.Hashtable
下面类或者接口中,不属于Java集合体系的是 ( ) A: java.util.Collections B: java.util.Map C: java.util.Vector D: java.util.Hashtable
Java 集合类中,Vector 类的特点是 ( )
Java 集合类中,Vector 类的特点是 ( )
Java语言中唯一自动引入程序中的类包是() A: lang B: util C: awt D: applet
Java语言中唯一自动引入程序中的类包是() A: lang B: util C: awt D: applet
Java语言中所有的类都直接或间接的继承自()类。 A: String B: Class C: Util D: Object
Java语言中所有的类都直接或间接的继承自()类。 A: String B: Class C: Util D: Object
Java中的字符串常量属于()对象。 A: Character B: String C: Vector D: StringBuffer
Java中的字符串常量属于()对象。 A: Character B: String C: Vector D: StringBuffer
为创建具有平台无关性的GUI提供了类和函数的Java包是()。 A: Graphics B: Awt C: Applet D: util
为创建具有平台无关性的GUI提供了类和函数的Java包是()。 A: Graphics B: Awt C: Applet D: util
在Web应用程序中,编写了公共的处理页面名为manage.jsp,该页面包含在Web根目录下名为util的文件夹中,那么在Web根目录下的其他页面上引用该页面的代码正确的是( )。 A: <% include file="util/manage.jsp"%> B: <%@ include file="util/manage.jsp"%> C: <%! include file="util/manage.jsp"%> D: <include file="util/manage.jsp">
在Web应用程序中,编写了公共的处理页面名为manage.jsp,该页面包含在Web根目录下名为util的文件夹中,那么在Web根目录下的其他页面上引用该页面的代码正确的是( )。 A: <% include file="util/manage.jsp"%> B: <%@ include file="util/manage.jsp"%> C: <%! include file="util/manage.jsp"%> D: <include file="util/manage.jsp">
在Java中,存放字符串变量的对象属于( )类对象。 A: Character B: String C: StringBuffer D: Vector
在Java中,存放字符串变量的对象属于( )类对象。 A: Character B: String C: StringBuffer D: Vector
If F is a vector field, then divF is a vector field.
If F is a vector field, then divF is a vector field.
In the vector field, the vector line is such a curve where ( ) A: The tangent direction at each point on it is orthogonal to the direction of the vector field at that point. B: The tangent direction at each point on it is parallel to the direction of the vector field at that point. C: The value of each point on it is equal to the value of the vector field at that point. D: The vector line is the geometric curve of the vector field function.
In the vector field, the vector line is such a curve where ( ) A: The tangent direction at each point on it is orthogonal to the direction of the vector field at that point. B: The tangent direction at each point on it is parallel to the direction of the vector field at that point. C: The value of each point on it is equal to the value of the vector field at that point. D: The vector line is the geometric curve of the vector field function.