CODEWITHSUNDEEP
java
user2867629
user2867629

Reputation: 33

Why is this code concatenating the empty string and an integer?

What does this snippet of code mean?

int value;
if (value > 0)
 String input = "" + value;

Upvotes: 1

Views: 936

Answers (3)

Sage
Sage

Reputation: 15418

String input = "" + value; value is an integer type. adding it to empty string-"" just making it a string. Suppose value = 3, then ""+value will be "3"

Edit: Forgot to mention about String.valueOf(val) function, another static utility method to convert almost all primitive type to String.

Upvotes: 2

Abdul Rehman
Abdul Rehman

Reputation: 2346

Compiler know how to add an integer with some string value. So in the code rather calling directly the integer to string conversion method. The coder generates an constant string ""(having no value in it) and then call concatenation operator(+) overloaded method to add and cast the integer into string value.

Upvotes: 0

cxw
cxw

Reputation: 17051

It is converting value to a string. "" + value is very similar to value.toString(). The "" means the compiler is looking for a string after the +, so when it sees value in that space, it automatically calls value.toString() to produce the string result.

Upvotes: 10

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