FindBugs错误修改中文说明大全

使用

equals

方法比较不相关的类和接口< /p>

24.

EC: Call to equals() comparing different interface types

(EC_UNRELATED_INTERFACES)

调用

equals

方法比较不同类型的接口

25.

EC: Call to equals() comparing different types

(EC_UNRELATED_TYPES)

调用

equals

方法比较不同类型的类< /p>

26.

EC: Using pointer equality to compare different types

(EC_UNRELATED_TYPES_USI NG_POINTER_EQUALITY)

This method uses using pointer equality to compare two

references that seem to be of different types. The result of this

comparison will always be false at runtime

.

27.

Eq: equals method always returns false (EQ_ALWAYS_FALSE)

使用

equals

方法返回值总是

false

28.

Eq: equals method always returns true (EQ_ALWAYS_TRUE)

equals

方法返回值总是

true

29.

Eq: equals method compares class names rather than class

objects (EQ_COMPARING_CLASS_NAMES)

使用

equals

方法去比较一个类的实例和类 的类型

30.

Eq: Covariant equals() method defined for enum

(EQ_DONT_DEFINE_EQUALS_FOR_ENUM)

This class defines an enumeration, and equality on enumerations

are defined using object identity. Defining a covariant equals

method for an enumeration value is exceptionally bad practice,

since it would likely result in having two different enumeration

values that compare as equals using the covariant enum method,

and as not equal when compared normally. Don't do it.

31.

Eq: equals() method defined that doesn't override equals(Object)

(EQ_OTHER_NO_OBJECT)

类中定义的

equals

方法时不要覆写

equals

（

Object

）方法

32.

Eq: equals() method defined that doesn't override

(Object) (EQ_OTHER_USE_OBJECT)

类中定义的

e quals

方法时不要覆写

Object

中的

equals

（

Object< /p>

）方

法

33.

Eq: equals method overrides equals in superclass and may not be

symmetric (EQ_OVERRIDING_EQUALS_NOT_SYMMETRIC)

34.

Eq: Covariant equals() method defined, (Object)

inherited (EQ_SELF_USE_OBJECT)

类中定义了一组

equals

方法，< /p>

但是都是继承的

class

中的

equals(Object)

方法

35.

FE: Doomed test for equality to NaN

(FE_TEST_IF_EQUAL_TO_NOT_A_NUMBER)

This code checks to see if a floating point value is equal to the

special Not A Number value (e.g., if (x == )).

However, because of the special semantics of NaN, no value is

equal to Nan, including NaN. Thus, x == always

evaluates to false. To check to see if a value contained in x is the

special Not A Number value, use (x) (or

(x) if x is floating point precision).

36.

FS: Format string placeholder incompatible with passed

argument (VA_FORMAT_STRING_BAD_ARGUMENT)

错误使用参数类型来格式化字符串

37.

FS: The type of a supplied argument doesn't match format

specifier (VA_FORMAT_STRING_BAD_CONVERSION)

指定的格式 字符串和参数类型不匹配，

例如：

(

3 8.

FS: MessageFormat supplied where printf style format expected

(VA_FORMAT_STRING _EXPECTED_MESSAGE_FORMAT_SUPPLIED

)

但用

String

的

f ormat

方法时实际调用了ＭｅｓｓａｇｅＦｏｒｍａｔ

中干 的格式化方法而引起格式化结果出错。

39.

FS: More arguments are passed than are actually used in the

format string

(VA_FORMAT_STRING_EXTRA_ARGUMENTS_PASSED) < /p>

使用

String

的

format

方法时有非法的参数也经过了格式化操作。

40.

FS: Illegal format string (VA_FORMAT_STRING_ILLEGAL)

格式化

String

对象语句错误

41.

FS: Format string references missing argument

(VA_FORMAT_STRING_MISSING_ARGUMENT)

String

的

format

操作缺少必要的参数。

42.

FS: No previous argument for format string

(VA_FORMAT_STRING_NO_PREVIOUS_ARGUMENT)

格式字符串定义错误，例如：

(

抛出< /p>

MissingFormatArgumentException

异常

43.

GC: No relationship between generic parameter and method

argument (GC_UNRELATED_TYPES)

This call to a generic collection method contains an argument

with an incompatible class from that of the collection's

parameter (i.e., the type of the argument is neither a supertype

nor a subtype of the corresponding generic type argument).

Therefore, it is unlikely that the collection contains any objects

that are equal to the method argument used here. Most likely,

the wrong value is being passed to the method.

In general, instances of two unrelated classes are not equal. For

example, if the Foo and Bar classes are not related by subtyping,

then an instance of Foo should not be equal to an instance of

Bar. Among other issues, doing so will likely result in an equals

method that is not symmetrical. For example, if you define the

Foo class so that a Foo can be equal to a String, your equals

method isn't symmetrical since a String can only be equal to a

String.

In rare cases, people do define nonsymmetrical equals methods

and still manage to make their code work. Although none of the

APIs document or guarantee it, it is typically the case that if you

check if a Collection contains a Foo, the equals method

of argument (e.g., the equals method of the Foo class) used to

perform the equality checks.

44.

HE: Signature declares use of unhashable class in hashed

construct

(HE_SIGNATURE_DECLARES_HASHING_OF_UNHAS HABLE_CLASS

)

A method, field or class declares a generic signature where a

non-hashable class is used in context where a hashable class is

required. A class that declares an equals method but inherits a

hashCode() method from Object is unhashable, since it doesn't

fulfill the requirement that equal objects have equal hashCodes.

45.

HE: Use of class without a hashCode() method in a hashed data

structure (HE_USE_OF_UNHASHABLE_CLASS)

A class defines an equals(Object) method but not a hashCode()

method, and thus doesn't fulfill the requirement that equal

objects have equal hashCodes. An instance of this class is used in

a hash data structure, making the need to fix this problem of

highest importance.

46.

ICAST: integral value cast to double and then passed to

(ICAST_INT_CAST_TO_ DOUBLE_PASSED_TO_CEIL)

integral

< br>的值转换为

double

后使用了

方法

47.

ICAST: int value cast to float and then passed to

(ICAST_INT_CAST_TO_FLOAT_PAS SED_TO_ROUND)

int

类型的值转换为

float

类型之后调用了

< br>方法

48.

IJU: JUnit assertion in run method will not be noticed by JUnit

(IJ U_ASSERT_METHOD_INVOKED_FROM_RUN_METHOD)

在

JUnit

中的断言在

run< /p>

方法中不会被告知

49.

IJU: TestCase declares a bad suite method

(IJU_BAD_SUITE_METHOD)

在一个

JUnit

类中声明的一个

suite()

方法必须声明为

public static suite()

或者

public static ite suite()

的形式。

50.

IL: A collection is added to itself

(IL_CONTAINER_ADDED_TO_ITSELF)

< br>集合本身作为

add

方法的参数，这样会引起内容溢出。

51.

IL: An apparent infinite loop (IL_INFINITE_LOOP)

方法的自调用引起的死循环

52.

IM: Integer multiply of result of integer remainder

(IM_MULTIPLYING_RESULT_OF_IREM)

和整数余数进行乘法运算。

例如：

i % 60 * 1000

是进行

(i % 60) * 1000

运算而不是

i % (60 * 1000)

53.

INT: Bad comparison of nonnegative value with negative

constant

(INT_BAD_COMPARISON_WITH_NONNEGATIVE_VALUE)

保证非负数和负数进行比较

54.

INT: Bad comparison of signed byte

(INT_BAD_COMPARISON_WITH_SIGNED_BYTE)

比较有符合数，要先把有符号数转换为无符合数再进行比较

55.

IO: Doomed attempt to append to an object output stream

(IO_APPENDING_TO_OBJECT_OUTPUT_STREAM)

宣布试图在对象的输出流处添加元素，

如果你希望能够添加进一 个对象

的输出流中必须保证对象的输出流处于打开状态。

56.

IP: A parameter is dead upon entry to a method but overwritten

(IP_PARAMETER_IS_DEAD_BUT_OVERWRITTEN)

The initial value of this parameter is ignored, and the parameter

is overwritten here. This often indicates a mistaken belief that the

write to the parameter will be conveyed back to the caller.

传入 参数的值被忽略，但是对传入值进行了修改，并返回给了调用者

57.

MF: Class defines field that masks a superclass field

(MF_CLASS_MASKS_FIELD)

子类中定义了和父类中同名的字段。在调用时会出错

58.

MF: Method defines a variable that obscures a field

(MF_METHOD_MASKS_FIELD)

在方法中 定义的局部变量和类变量或者父类变量同名，

从而引起字段混

淆 。

59.

NP: Null pointer dereference (NP_ALWAYS_NULL)

对象赋为

null

值后

没有被重新赋值

60.

NP: Null pointer dereference in method on exception path

(NP_ALWAYS_NULL_EXCEPTION)

A pointer which is null on an exception path is dereferenced

here.

This will lead to a NullPointerException when the code is

executed.

Note that because FindBugs currently does not prune

infeasible exception paths, this may be a false warning.

Also note that FindBugs considers the default case of a switch

statement to be an exception path, since the default case is often

infeasible.

空指针引用上调用去除引用方法，将发生空指针异常

61.

NP: Method does not check for null argument

(NP_ARGUMENT_MIGHT_BE_NULL)

方法没有判断参数是否为空

62.

NP: close() invoked on a value that is always null

(NP_CLOSING_NULL)

一个为空的对象调用

close

方法

63.

NP: Null value is guaranteed to be dereferenced

(NP_GUARANTEED_DEREF)

There is a statement or branch that if executed guarantees that a

value is null at this point, and that value that is guaranteed to be

dereferenced (except on forward paths involving runtime

exceptions).

在正常的

null

判断分支上，对象去除引用操作是受保护的不允许的

64.

NP: Value is null and guaranteed to be dereferenced on

exception path

(NP_GUARANTEED_DEREF_ON_EXCEPTION_PATH)

There is a statement or branch on an exception path that if

executed guarantees that a value is null at this point, and that

value that is guaranteed to be dereferenced (except on forward

paths involving runtime exceptions).

65.

NP: Method call passes null to a nonnull parameter

(NP_NONNULL_PARAM_VIOLATION)

方法中为

null

的参数没有被重新赋值

void test(){

}

String ss = null;

sya(ss);

public void sya(String ad){

}

es();

66.

NP: Method may return null, but is declared @NonNull

(NP_NONNULL_RETURN_VIOLATION)

方法声明了返回值不能为空，但是方法中有可能返回

null

67.

NP: A known null value is checked to see if it is an instance of a

type (NP_NULL_INSTANCEOF)

检查 一个为

null

的值是否是想要的类型对象，

< br>而不是由于粗心或者逻辑

错误引起的

68.

NP: Possible null pointer dereference

(NP_NULL_ON_SOME_PATH)

对象可能没有重新赋值

69.

NP: Possible null pointer dereference in method on exception

path (NP_NULL_ON_SOME_PATH_EXCEPTION)

A reference value which is null on some exception control path is

dereferenced here.

This may lead to a NullPointerException

when the code is executed.

Note that because FindBugs

currently does not prune infeasible exception paths, this may be

a false warning.

Also note that FindBugs considers the default case of a switch

statement to be an exception path, since the default case is often

infeasible.

在异常

null

值处理分支调用的方法上，< /p>

可能存在对象

去除引用操作

70.

NP: Method call passes null for nonnull parameter

(NP_NULL_PARAM_DEREF_ALL_TARG ETS_DANGEROUS)

方法参数中声明为

nonnu ll

类型的参数为

null

void test(){

}

String ss = null;

sya(ss);

public void sya(@nonnull String ad){

}

es();

71.

NP: Store of null value into field annotated NonNull

(NP_STORE_INTO_NONNULL_FIELD)

为一个已经声明为不能为

null

值的属性赋值为