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Is there any difference in following two lines of code that compares the string values.
string str = "abc";
if(str.Equals("abc"))
and
if("abc".Equals(str))
in the first line I am calling the equals method on string variable to compare it with string literal. The second line is vice versa. Is it just the difference of coding style or there is a difference in the way these two statements are processed by the compiler.
804
In simple words, == checks if both objects point to the same memory location whereas . equals() evaluates to the comparison of values in the objects. If a class does not override the equals method, then by default, it uses the equals(Object o) method of the closest parent class that has overridden this method.
The major difference between the == operator and . equals() method is that one is an operator, and the other is the method. Both these == operators and equals() are used to compare objects to mark equality.
The Equality Operator ( ==) is the comparison operator and the Equals() method in C# is used to compare the content of a string. The Equals() method compares only content.
Definition and Usage The equals() method compares two strings, and returns true if the strings are equal, and false if not.
The only difference is that, in the first case, when you do:
str.Equals("abc")
If str is null, you'll get an exception at runtime. By doing:
"abc".Equals(str)
If str is null, you'll get false.
190
The difference is that in the second example, you will never get a NullReferenceException because a literal can't be null.
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