类 Validate

构造器详细资料

• Validate

  public Validate()

方法详细资料

• isTrue

  public static void isTrue(boolean expression,
                            String message,
                            long value)

  Validate that the argument condition is true; otherwise throwing an exception with the specified message. This method is useful when validating according to an arbitrary boolean expression, such as validating a primitive number or using your own custom validation expression.

  Validate.isTrue(i > 0.0, "The value must be greater than zero: %d", i);

  For performance reasons, the long value is passed as a separate parameter and appended to the exception message only in the case of an error.

  参数:

  expression - the boolean expression to check

  message - the String.format(String, Object...) exception message if invalid, not null

  value - the value to append to the message when invalid

  抛出:

  IllegalArgumentException - if expression is false

  另请参阅:

  isTrue(boolean), isTrue(boolean, String, double), isTrue(boolean, String, Object...)

• isTrue

  public static void isTrue(boolean expression,
                            String message,
                            double value)

  Validate that the argument condition is true; otherwise throwing an exception with the specified message. This method is useful when validating according to an arbitrary boolean expression, such as validating a primitive number or using your own custom validation expression.

  Validate.isTrue(d > 0.0, "The value must be greater than zero: %s", d);

  For performance reasons, the double value is passed as a separate parameter and appended to the exception message only in the case of an error.

  参数:

  expression - the boolean expression to check

  message - the String.format(String, Object...) exception message if invalid, not null

  value - the value to append to the message when invalid

  抛出:

  IllegalArgumentException - if expression is false

  另请参阅:

  isTrue(boolean), isTrue(boolean, String, long), isTrue(boolean, String, Object...)

• isTrue

  public static void isTrue(boolean expression,
                            String message,
                            Object... values)

  Validate that the argument condition is true; otherwise throwing an exception with the specified message. This method is useful when validating according to an arbitrary boolean expression, such as validating a primitive number or using your own custom validation expression.

   Validate.isTrue(i >= min && i <= max, "The value must be between %d and %d", min, max);
   Validate.isTrue(myObject.isOk(), "The object is not okay");

  参数:

  expression - the boolean expression to check

  message - the String.format(String, Object...) exception message if invalid, not null

  values - the optional values for the formatted exception message, null array not recommended

  抛出:

  IllegalArgumentException - if expression is false

  另请参阅:

  isTrue(boolean), isTrue(boolean, String, long), isTrue(boolean, String, double)

• isTrue

  public static void isTrue(boolean expression)

  Validate that the argument condition is true; otherwise throwing an exception. This method is useful when validating according to an arbitrary boolean expression, such as validating a primitive number or using your own custom validation expression.

   Validate.isTrue(i > 0);
   Validate.isTrue(myObject.isOk());

  The message of the exception is "The validated expression is false".

  参数:

  expression - the boolean expression to check

  抛出:

  IllegalArgumentException - if expression is false

  另请参阅:

  isTrue(boolean, String, long), isTrue(boolean, String, double), isTrue(boolean, String, Object...)

• notNull

  public static <T> T notNull(T object)

  Validate that the specified argument is not null; otherwise throwing an exception.

  Validate.notNull(myObject, "The object must not be null");

  The message of the exception is "The validated object is null".

  类型参数:

  T - the object type

  参数:

  object - the object to check

  返回:

  the validated object (never null for method chaining)

  抛出:

  NullPointerException - if the object is null

  另请参阅:

  notNull(Object, String, Object...)

• notNull

  public static <T> T notNull(T object,
                              String message,
                              Object... values)

  Validate that the specified argument is not null; otherwise throwing an exception with the specified message.

  Validate.notNull(myObject, "The object must not be null");

  类型参数:

  T - the object type

  参数:

  object - the object to check

  message - the String.format(String, Object...) exception message if invalid, not null

  values - the optional values for the formatted exception message

  返回:

  the validated object (never null for method chaining)

  抛出:

  NullPointerException - if the object is null

  另请参阅:

  notNull(Object)