File: IntLongMath.md

package info (click to toggle)
error-prone-java 2.18.0-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm, forky, sid, trixie
  • size: 23,204 kB
  • sloc: java: 222,992; xml: 1,319; sh: 25; makefile: 7
file content (16 lines) | stat: -rw-r--r-- 509 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Performing an arithmetic expression on arguments of type int and then assigning
the result to a long is error-prone. The result is widened to a long as the
final step, and the intermediate results may overflow.

For example, the following expression exceeds `Integer.MAX_VALUE` and overflows
to `-1857093632`:

```java
long nanosPerDay = 24 * 60 * 60 * 1000 * 1000 * 1000;
```

The corrected code (which has a value of `86400000000000`) is:

```java
long nanosPerDay = 24L * 60 * 60 * 1000 * 1000 * 1000;
```