A: is also called a static member
B: is always a variable
C: is never a method
D: belongs to a single instance， not to the class as a whole
E: always represents an operation
举一反三
- An instance member（） A: is also called a static member B: is always a variable C: is never a method D: belongs to a single instance， not to the class as a whole E: always represents an operatio
- Which of the following is false? ( ) A: A static method must be used to access private static instance variables. B: A static method can be accessed even when no objects of its class have been instantiated. C: A static method has no this reference. D: A static method can call instance methods directly.
- An object is an instance of a A: program B: class C: method D: data
- Which of the following is the order of applying object-oriented concept in programming A: instance creating — class defining — use attributes or methods through the instance B: class defining — instance creating — use attributes or methods through the instance C: instance creating — use attributes or methods through the instance — class defining D: class defining — use attributes or methods through the instance —instance creating
- He is a League member, _______ he is always ready to help others.
内容
- 0
For instance, workplace fashion trends do not always （区分）between jobs and careers.
- 1
定义类的关键字是 ( ) A: Class B: class C: Instance D: instance
- 2
【单选题】下面的代码实现了设计模式中的()模式 public class A{ private A instance; private A(){} public static Aget Instance{ if(A==null) instance = new A(); return instance; } } A. Factory B. AbstractFactory C. Singleton D. Builder
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下面程序的输出结果是： class Myclass{ static int member; } public class Test{ public static void main(String args[]){ Myclass A = new Myclass(); Myclass B = new Myclass(); Myclass.member = 1; A.member = 2; B.member = 3; System.out.println("member = "+ Myclass.member); } }
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The scope of a private instance field is: 私有实例字段的范围是: A: the instance methods of the same class 同一个类的实例方法 B: inside the class, but not inside any method 在类中，但不在任何方法中 C: inside the parentheses of a method header 方法头的括号内 D: the method in which they are defined 定义它们的方法