why is not (123 == 0123) in java?

Question

I am developing an application in Android using Eclipse. I wrote the following code and in tests the first and third "if" block is not reachable. Why? When I add a leading zero to a number, the equal operator returns false. ``` int var = 123; if (var == 0123) { //not reachable } if (var == 123) { //reachable } if (var == (int)0123) { //not reachable } if (var == (int)123) { //reachable } ```

Accepted Answer

`0123` is an octal number (leading 0), while `123` is a decimal number.

so 0123 actually equals to 83.

why is not (123 == 0123) in java?

Solution

Problem