网友您好, 请在下方输入框内输入要搜索的题目:
题目内容
(请给出正确答案)
两个对像值相同(x.equals(y)==true),但却可有不同的hashcode,这句话对不对?
参考答案
更多 “两个对像值相同(x.equals(y)==true),但却可有不同的hashcode,这句话对不对?” 相关考题
考题
逻辑变量x、Y进行逻辑“异或”(用表示)运算的含义是:若X、Y取值相同(都为 true或都为false),则XY的值为false,否则XY的值为true。用逻辑“与”(∧)、“或” (∨)、“非”(-)表示XY的式子为(3)。A.(X∧Y)∧(X∧Y)B.(X∨Y)∧(X∨Y)C.(X∧Y)∨(X∧Y)D.(X∨Y)∨(X∨Y)
考题
写出执行完下列代码段之后指定变量的值:bool x=true ,y=false,z=false;x=xy||z;y=x||yz;z=!(x!=y)||(y==z);则x=false,y=【 】,z=【 】。
考题
逻辑变量X、Y进行逻辑“异或”(用表示)运算的含义是:若X、Y取值相同(都为true或都为false),则XY的值为false,否则XY的值为true。用逻辑“与”(∧)、“或”(∨)、“非”(-)表示XY的式子为______。A.B.C.D.
考题
逻辑变量X、Y进行逻辑“异或”(用 表示)运算的含义是:若X、Y取值相同(都为true或都为false),则X Y的值为false,否则X Y的值为true。用逻辑“与”(∧)、“或”(∨)、“非”( )表示X Y的式子为 (6) 。A.AB.BC.CD.D
考题
逻辑变量x、Y进行逻辑“异或”(用⊕表示)运算的含义是:若x、Y取值相同(都为trlle或都为false),则x⊕Y值为false,否则x⊕Y的值为true c。用逻辑“与”(∧)、“或”(∨)、“非”(-)表示x⊕Y的式子为( )。A.(X∧Y)∧(x∧Y)B.(X∨Y) ∧(X∨Y)C.(X∧Y)∨(x∧Y)D.(X∨VY)∨(X∨Y)
考题
逻辑表达式的值只有两个:True和False。当逻辑表达式成立,其值为();不成立,其值为()。A、True;TrueB、False;TrueC、False;FalseD、True;False
考题
class Sock { String size; String color; public boolean equals(Object o) { Sock s = (Sock) o; return color.equals(s.color); } // insert code here } 哪两个满足 hashCode 的约定?()A、public int hashCode() { return 343; }B、public int hashCode() { return size.hashCode (); }C、public int hashCode() { return color.hashCode (); }D、public int hashCode() { return (int) (Math.random() * 1000);
考题
Which two statements are true regarding the return values of property written hashCode and equals methods from two instances of the same class?()A、 If the hashCode values are different, the objects might be equal.B、 If the hashCode values are the same, the object must be equal.C、 If the hashCode values are the same, the objects might be equal.D、 If the hashCode values are different, the objects must be unequal.
考题
Which two statements are true about the hashCode method?()A、The hashCode method for a given class can be used to test for object equality and object inequality for that class.B、The hashCode method is used by the java.util.SortedSet collection class to order the elements within that set.C、The hashCode method for a given class can be used to test for object inequality, but NOT objecte quality, for that class.D、The only important characteristic of the values returned by a hashCode method is that the distribution of values must follow a Gaussian distribution.E、The hashCode method is used by the java.util.HashSet collection class to group the elements within that set into hash buckets for swift retrieval.
考题
在带同样纯电阻负载的电压型半桥逆变电路和电压型全桥逆变电路中,下述哪项是正确的()。A、两个电路输出的电压波形形状是相同的,但幅值不同B、两个电路输出的电流波形形状是相同的,幅值也相同C、两个电路输出的电压波形形状是不同的,但幅值相同D、两个电路输出的电流波形形状是不同的,且幅值也不同
考题
多选题Which two statements are true regarding the return values of property written hashCode and equals methods from two instances of the same class?()AIf the hashCode values are different, the objects might be equal.BIf the hashCode values are the same, the object must be equal.CIf the hashCode values are the same, the objects might be equal.DIf the hashCode values are different, the objects must be unequal.
考题
多选题Which two statements are true about the hashCode method?()AThe hashCode method for a given class can be used to test for object equality and object inequality for that class.BThe hashCode method is used by the java.util.SortedSet collection class to order the elements within that set.CThe hashCode method for a given class can be used to test for object inequality, but NOT objecte quality, for that class.DThe only important characteristic of the values returned by a hashCode method is that the distribution of values must follow a Gaussian distribution.EThe hashCode method is used by the java.util.HashSet collection class to group the elements within that set into hash buckets for swift retrieval.
考题
问答题两个对象值相同(x.equals(y) == true),但却可有不同的hash code,这句话对不对?
热门标签
最新试卷