Syntax[edit | edit source]
- assert expression1;
- assert expression1 : expression2;
Parameters[edit | edit source]
|expression1||The assertion statement throws an |
|expression2||Optional. When used, |
Remarks[edit | edit source]
By default, assertions are disabled at runtime.
To enable assertions, you must run java with
java -ea com.example.AssertionExample
Assertions are statements that will throw an error if their expression evaluates to
false. Assertions should only be used to test code; they should never be used in production.
Checking arithmetic with assert[edit | edit source]
a = 1 - Math.abs(1 - a % 2); // This will throw an error if my arithmetic above is wrong. assert a >= 0 && a <= 1 : "Calculated value of " + a + " is outside of expected bounds"; return a;