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V6046. Incorrect format. Consider checking the N format items of the 'Foo' function.
The analyzer has detected a possible error related to use of formatting methods: String.format, System.out.format, System.err.format, etc. The format string does not correspond with actual arguments passed to the method.
Here are some simple examples:
Unused arguments.
int A = 10, B = 20;
double C = 30.0;
System.out.format("%1$s < %2$s", A, B, C);Format item '%3$s' is not specified, so variable 'C' won't be used.
Possible correct versions of the code:
//Remove extra argument
System.out.format("%1$s < %2$s", A, B);
//Fix format string
System.out.format("%1$s < %2$s < %3$s", A, B, C);Number of arguments passed is less than expected.
int A = 10, B = 20;
double C = 30.0;
System.out.format("%1$s < %2$s < %3$s", A, B);A much more dangerous situation occurs when a function receives fewer arguments than expected. This leads to an exception.
Possible correct versions of the code:
//Add missing argument
System.out.format("%1$s < %2$s < %3$s", A, B, C);
//Fix indices in format string
System.out.format("%1$s < %2$s", A, B);The analyzer doesn't output the warning given that:
- The number of format items specified matches the number of arguments.
- The format object is used a number of times:
int row = 10;
System.out.format("Line: %1$s; Index: %1$s", row);This diagnostic is classified as:
You can look at examples of errors detected by the V6046 diagnostic. |
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