[Solved] Why 2 return statements are mandatory in equals method
return true is only executed if the if condition is true. For all other cases you need the return false 0 solved Why 2 return statements are mandatory in equals method
equals
[Solved] What is the need to override equals method in String class? [closed]
Not all “String in Java are interned”. Try reading something from a file or console, those Strings aren’t “interned”, thus equals() (and also hashcode()) needs to be overriden. 1 solved What is the need to override equals method in String class? [closed]
[Solved] Error Operator ‘==’ cannot be applied to operands of type ‘char’ and ‘string’ [closed]
Use ‘a’ and not “a”, the difference between char and string is subtle here but substantial. solved Error Operator ‘==’ cannot be applied to operands of type ‘char’ and ‘string’ [closed]
[Solved] Default implementation for hashCode() and equals() for record vs class in Java
In a nutshell the difference is simple: the default implementation of equals() and hashCode() for java.lang.Object will never consider two objects as equal unless they are the same object (i.e. it’s “object identity”, i.e. x == y). the default implementation of equals() and hashCode() for records will consider all components (or fields) and compare them … Read more
[Solved] Difference between == and Equals in C# [duplicate]
== is an operator, which, when not overloaded means “reference equality” for classes (and field-wise equality for structs), but which can be overloaded. A consequence of it being an overload rather than an override is that it is not polymorphic. Equals is a virtual method; this makes it polymorphic, but means you need to be … Read more
[Solved] == vs. in operator in Python [duplicate]
if 0 in (result1, result2, result3): is equivalent to: if result1==0 or result2==0 or result3==0: What you want is this: if (0,0,0) == (result1, result2, result3): Which is equivalent to: if result1==0 and result2==0 and result3==0: You could actually even do this: if result1==result2==result3==0: since you’re checking to see if all 3 variables equal the … Read more
[Solved] Examining associated objects in equals() [closed]
While I think it is generally a good idea to avoid basing equality on associations, I would argue that this does not apply in all cases. While it is a good rule of thumb, there are likely a number of cases where this rule breaks completely. It is entirely dependent on the domain and what … Read more
[Solved] How to check if a string equals to “}”
Just do str_.equals(“{“); or str_.equals(“}”); We are still not sure which brace EDIT: Ah now we have clarity. Use str_.equals(“}”); 3 solved How to check if a string equals to “}”
[Solved] Java , The equals() Method [closed]
Result of equals method depends very much on its implementation. Method equals of Object: public boolean equals(Object obj) { return (this == obj); } This means, that equals will return true, only if the two variables holds the references (therefore references to the same object). If it returns false, this must by caused by overriding … Read more
[Solved] IndexOf not working on childList [closed]
public int indexOf(Object o) { if (o == null) { for (int i = 0; i < size; i++) if (elementData[i]==null) return i; } else { for (int i = 0; i < size; i++) if (o.equals(elementData[i])) return i; } return -1; } This is actual method in Arraylist ,after reading i came to know … Read more
[Solved] Comparing java Strings with == [duplicate]
there is no custom operator overloading in java. [so you cannot overload it to call equals()] the equals() ensures you check if 2 Objects are identical,while == checks if this is the exact same object. [so no, using == does not invoke equals()]. 2 solved Comparing java Strings with == [duplicate]