Question

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Difference between declaring variables before or in loop?

String str;
for (int i = 0; i < 10; i++) {
    str = "Hello, World"; // Is str created only 1 time?
}

What is difference between above and below?
And if they are different, which one is better?

for (int i = 0; i < 10; i++) {
    String str = "Hello, World"; // Is str created 10 times?
}

Answer 1

If you didn’t write up your example with a string literal, which is basically a singleton constant, then the answer would be that in both cases 10 objects are created. In your specific example, no objects are created.