java.lang.NullPointerException(空指针异常)是Java中常见的运行时异常之一。当应用程序试图在需要对象的地方使用null时,就会抛出此异常。简而言之,它表明某个变量被赋予了null值,但在后续操作中又试图访问或调用该变量的成员(如方法或属性),从而导致异常。
NullPointerException - if the argument is null toString public String toString() Overrides: toString in class Enum<ResourceNotFoundExceptionReason> fromValue public static ResourceNotFoundExceptionReason fromValue(String value) Use this in place of valueOf. Parameters: value - re...
}catch(CertPathValidatorException cpve) {if(cpve.getReason() != BasicReason.REVOKED) {thrownewException("unexpected exception, should be aREVOKEDCPVE", cpve); } } } 开发者ID:lambdalab-mirror,项目名称:jdk8u-jdk,代码行数:39,代码来源:CircularCRLOneLevelRevoked.java 示例5: main ▲点赞 2...
NullPointerException - if the argument is null toString public String toString() Overrides: toString in class Enum<ParameterExceptionReason> fromValue public static ParameterExceptionReason fromValue(String value) Use this in place of valueOf. Parameters: value - real value Returns: Paramete...
public staticCertPathValidatorException.BasicReason[] values() 按照声明的顺序返回一个包含此枚举类型常量的数组。此方法可用于迭代常量,如下所示: for (CertPathValidatorException.BasicReason c : CertPathValidatorException.BasicReason.values()) System.out.println(c); ...
NullPointerException- if the argument is null getCloseCode public staticCloseReason.CloseCodegetCloseCode(int code) Creates a CloseCode from the given int code number. This method throws an IllegalArgumentException if the int is not one of the ...
name- the name of the enum constant to be returned. Returns: the enum constant with the specified name Throws: java.lang.IllegalArgumentException- if this enum type has no constant with the specified name java.lang.NullPointerException- if the argument is null...
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Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows: for (ConstraintViolationExceptionReason c : ConstraintViolationExceptionReason.values()) System.out.println(c); ...