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Sanity4J was created to simplify running multiple static code
analysis tools on the Java projects. It provides a single entry
point to run all the selected tools and produce a consolidated
report, which presents all findings in an easily accessible
manner.
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UselessOperationOnImmutable
UselessOperationOnImmutable
An operation on an Immutable object (BigDecimal or BigInteger) won't change the object itself. The
result of the operation is a new object. Therefore, ignoring the operation result is an error.
This rule is defined by the following Java class:
net.sourceforge.pmd.rules.UselessOperationOnImmutable
Example:
import java.math.*;
class Test {
void method1() {
BigDecimal bd=new BigDecimal(10);
bd.add(new BigDecimal(5)); // this will trigger the rule
}
void method2() {
BigDecimal bd=new BigDecimal(10);
bd = bd.add(new BigDecimal(5)); // this won't trigger the rule
}
}