o != arg0
is the same as !(o == (arg0))
.
o != arg0
is the same as !(o == (arg0))
.
the object to compare against this object for dis-equality.
false
if the receiver object is equivalent to the argument; true
otherwise.
o == arg0
is the same as if (o eq null) arg0 eq null else o.equals(arg0)
.
o == arg0
is the same as if (o eq null) arg0 eq null else o.equals(arg0)
.
the object to compare against this object for equality.
true
if the receiver object is equivalent to the argument; false
otherwise.
o == arg0
is the same as o.equals(arg0)
.
o == arg0
is the same as o.equals(arg0)
.
the object to compare against this object for equality.
true
if the receiver object is equivalent to the argument; false
otherwise.
This method is used to cast the receiver object to be of type T0
.
This method is used to cast the receiver object to be of type T0
.
Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression1.asInstanceOf[String]
will throw a ClassCastException
at runtime, while the expressionList(1).asInstanceOf[List[String]]
will not. In the latter example, because the type argument is erased as
part of compilation it is not possible to check whether the contents of the list are of the requested typed.
the receiver object.
This method creates and returns a copy of the receiver object.
This method creates and returns a copy of the receiver object.
The default implementation of the clone
method is platform dependent.
a copy of the receiver object.
This method is used to test whether the argument (arg0
) is a reference to the
receiver object (this
).
This method is used to test whether the argument (arg0
) is a reference to the
receiver object (this
).
The eq
method implements an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation] on
non-null instances of AnyRef
:
* It is reflexive: for any non-null instance x
of type AnyRef
, x.eq(x)
returns true
.
* It is symmetric: for any non-null instances x
and y
of type AnyRef
, x.eq(y)
returns true
if and
only if y.eq(x)
returns true
.
* It is transitive: for any non-null instances x
, y
, and z
of type AnyRef
if x.eq(y)
returns true
and y.eq(z)
returns true
, then x.eq(z)
returns true
.
Additionally, the eq
method has three other properties.
* It is consistent: for any non-null instances x
and y
of type AnyRef
, multiple invocations of
x.eq(y)
consistently returns true
or consistently returns false
.
* For any non-null instance x
of type AnyRef
, x.eq(null)
and null.eq(x)
returns false
.
* null.eq(null)
returns true
.
When overriding the equals
or hashCode
methods, it is important to ensure that their behavior is
consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2
), they
should be equal to each other (o1 == o2
) and they should hash to the same value (o1.hashCode == o2.hashCode
).
the object to compare against this object for reference equality.
true
if the argument is a reference to the receiver object; false
otherwise.
This method is used to compare the receiver object (this
) with the argument object (arg0
) for equivalence.
This method is used to compare the receiver object (this
) with the argument object (arg0
) for equivalence.
The default implementations of this method is an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence
relation]:
* It is reflexive: for any instance x
of type Any
, x.equals(x)
should return true
.
* It is symmetric: for any instances x
and y
of type Any
, x.equals(y)
should return true
if and
only if y.equals(x)
returns true
.
* It is transitive: for any instances x
, y
, and z
of type AnyRef
if x.equals(y)
returns true
and
y.equals(z)
returns true
, then x.equals(z)
should return true
.
If you override this method, you should verify that your implementation remains an equivalence relation.
Additionally, when overriding this method it is often necessary to override hashCode
to ensure that objects
that are "equal" (o1.equals(o2)
returns true
) hash to the same
scala.Int
(o1.hashCode.equals(o2.hashCode)
).
the object to compare against this object for equality.
true
if the receiver object is equivalent to the argument; false
otherwise.
This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.
This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.
The details of when and if the finalize
method are invoked, as well as the interaction between finalize
and non-local returns and exceptions, are all platform dependent.
Flush the output stream.
Flush the output stream. This function is required when partial output (i.e. output not terminated by a new line character) has to be made visible on the terminal.
Returns a representation that corresponds to the dynamic class of the receiver object.
Returns a representation that corresponds to the dynamic class of the receiver object.
The nature of the representation is platform dependent.
a representation that corresponds to the dynamic class of the receiver object.
Returns a hash code value for the object.
Returns a hash code value for the object.
The default hashing algorithm is platform dependent.
Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)
) yet
not be equal (o1.equals(o2)
returns false
). A degenerate implementation could always return 0
.
However, it is required that if two objects are equal (o1.equals(o2)
returns true
) that they have
identical hash codes (o1.hashCode.equals(o2.hashCode)
). Therefore, when overriding this method, be sure
to verify that the behavior is consistent with the equals
method.
the hash code value for the object.
This method is used to test whether the dynamic type of the receiver object is T0
.
This method is used to test whether the dynamic type of the receiver object is T0
.
Note that the test result of the test is modulo Scala's erasure semantics. Therefore the expression1.isInstanceOf[String]
will return false
, while the expression List(1).isInstanceOf[List[String]]
will
return true
. In the latter example, because the type argument is erased as part of compilation it is not
possible to check whether the contents of the list are of the requested typed.
true
if the receiver object is an instance of erasure of type T0
; false
otherwise.
o.ne(arg0)
is the same as !(o.eq(arg0))
.
o.ne(arg0)
is the same as !(o.eq(arg0))
.
the object to compare against this object for reference dis-equality.
false
if the argument is not a reference to the receiver object; true
otherwise.
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
Print an object on the terminal.
Print an object on the terminal.
the object to print.
Prints its arguments as a formatted string, based on a string pattern (in a fashion similar to printf in C).
Prints its arguments as a formatted string, based on a string pattern (in a fashion similar to printf in C).
The interpretation of the formatting patterns is described in
java.util.Formatter
.
the pattern for formatting the arguments.
the arguments used to instantiating the pattern.
Print out an object followed by a new line character.
Print out an object followed by a new line character.
the object to print.
Print a new line character on the terminal.
Print a new line character on the terminal.
Read a boolean value from the terminal.
Read a boolean value from the terminal.
Throws EOFException
if the end of the
input stream has been reached.
the boolean value read from the terminal.
Read a byte value from the terminal.
Read a byte value from the terminal.
Throws EOFException
if the end of the
input stream has been reached.
Read a char value from the terminal.
Read a char value from the terminal.
Throws EOFException
if the end of the
input stream has been reached.
Read a double value from the terminal.
Read a double value from the terminal.
Throws EOFException
if the end of the
input stream has been reached.
Read a float value from the terminal.
Read a float value from the terminal.
Throws EOFException
if the end of the
input stream has been reached.
Read an int value from the terminal.
Read an int value from the terminal.
Throws EOFException
if the end of the
input stream has been reached.
Print a formatted text and read a full line from the terminal.
Print a formatted text and read a full line from the terminal. Returns null if the end of the input stream has been reached.
the format of the text to print out.
the parameters used to instantiate the format.
the string read from the terminal.
Read a full line from the terminal.
Read a full line from the terminal. Returns null
if the end of the
input stream has been reached.
the string read from the terminal.
Read an int value from the terminal.
Read an int value from the terminal.
Throws EOFException
if the end of the
input stream has been reached.
Read a short value from the terminal.
Read a short value from the terminal.
Throws EOFException
if the end of the
input stream has been reached.
Read in some structured input, specified by a format specifier.
Read in some structured input, specified by a format specifier.
See class java.text.MessageFormat
for details of
the format specification.
Throws EOFException
if the end of the
input stream has been reached.
the format of the input.
a list of all extracted values.
Read in some structured input, specified by a format specifier.
Read in some structured input, specified by a format specifier.
Opposed to readf
, this function only returns the
first value extracted from the input according to the format
specification.
...
...
Read in some structured input, specified by a format specifier.
Read in some structured input, specified by a format specifier.
Opposed to readf
, this function only returns the
first two values extracted from the input according to the format
specification.
...
...
Read in some structured input, specified by a format specifier.
Read in some structured input, specified by a format specifier.
Opposed to readf
, this function only returns the
first three values extracted from the input according to the format
specification.
...
...
Set the default error stream.
Set the default error stream.
the new error stream.
Set the default error stream.
Set the default error stream.
the new error stream.
Set the default input stream.
Set the default input stream.
the new input stream.
Set the default input stream.
Set the default input stream.
specifies the new input stream.
Set the default output stream.
Set the default output stream.
the new output stream.
Set the default output stream.
Set the default output stream.
the new output stream.
Returns a string representation of the object.
Returns a string representation of the object.
The default representation is platform dependent.
a string representation of the object.
Set the default error stream for the duration of execution of one thunk.
Set the default error stream for the duration of execution of one thunk.
the new error stream.
the code to execute with the new error stream active
...
Set the default error stream for the duration of execution of one thunk.
Set the default error stream for the duration of execution of one thunk.
the new error stream.
the code to execute with the new error stream active
...
Set the default input stream for the duration of execution of one thunk.
Set the default input stream for the duration of execution of one thunk.
the new input stream.
the code to execute with the new input stream active
Set the default input stream for the duration of execution of one thunk.
Set the default input stream for the duration of execution of one thunk.
the code to execute with the new input stream active
Set the default output stream for the duration of execution of one thunk.
Set the default output stream for the duration of execution of one thunk.
the new output stream.
the code to execute with the new output stream active
...
Set the default output stream for the duration of execution of one thunk.
Set the default output stream for the duration of execution of one thunk.
the new output stream.
the code to execute with the new output stream active
...
The
Console
object implements functionality for printing Scala values on the terminal. There are also functions for reading specific values.Console
also defines constants for marking up text on ANSI terminals.version
1.0, 03/09/2003
authors:
Matthias Zenger