java - Sonar 违规

Question

public Integer getMaxCount(String id,String type) {
    String maxCount ="SELECT MAX(ID) AS COUNT FROM STUDENT";
    try {
        return queryForObject(
            maxCount, 
            new Object[]{id,type}, 
            (rs, i) -> {return rs.getInt(COUNT);},
            "maxCount"
        );
    } catch (EmptyResultDataAccessException ex) {
        LOG.error(ex);
        return 9999;
    }
}

如何修复上述代码块的 Sonar 违规问题。

Lambdas should be replaced with method references

Lambdas containing only one statement should not nest this statement in a block

Answer 1

它们是:

• > S1612 "Lambdas should be replaced with method references"
• > S1602 "Lamdbas containing only one statement should not nest this statement in a block"

两个页面都包含有关如何修复代码的示例。

x -> System.out.println(x+1)
(a, b) -> a+b    //For return statement, the return keyword should also be dropped