Test two objects for inequality.
Test two objects for inequality.
true
if !(this == that), false otherwise.
Equivalent to x.hashCode
except for boxed numeric types and null
.
Equivalent to x.hashCode
except for boxed numeric types and null
.
For numerics, it returns a hash value which is consistent
with value equality: if two value type instances compare
as true, then ## will produce the same hash value for each
of them.
For null
returns a hashcode where null.hashCode
throws a
NullPointerException
.
a hash value consistent with ==
Test two objects for equality.
Test two objects for equality.
The expression x == that
is equivalent to if (x eq null) that eq null else x.equals(that)
.
true
if the receiver object is equivalent to the argument; false
otherwise.
Foreground color for ANSI black
Background color for ANSI black
ANSI blink
Foreground color for ANSI blue
Background color for ANSI blue
ANSI bold
Foreground color for ANSI cyan
Background color for ANSI cyan
Foreground color for ANSI green
Background color for ANSI green
ANSI invisible
Foreground color for ANSI magenta
Background color for ANSI magenta
Foreground color for ANSI red
Background color for ANSI red
Reset ANSI styles
ANSI reversed
ANSI underlines
Foreground color for ANSI white
Background color for ANSI white
Foreground color for ANSI yellow
Background color for ANSI yellow
Cast the receiver object to be of type T0
.
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 expression 1.asInstanceOf[String]
will throw a ClassCastException
at
runtime, while the expression List(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 type.
the receiver object.
if the receiver object is not an instance of the erasure of type T0
.
Create a copy of the receiver object.
Tests whether the argument (arg0
) is a reference to the receiver object (this
).
Tests whether the argument (arg0
) is a reference to the receiver object (this
).
The eq
method implements an equivalence relation on
non-null instances of AnyRef
, and has three additional properties:
x
and y
of type AnyRef
, multiple invocations of
x.eq(y)
consistently returns true
or consistently returns false
.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
).
true
if the argument is a reference to the receiver object; false
otherwise.
The equality method for reference types.
The default error, can be overridden by setErr
Called by the garbage collector on the receiver object when there are no more references to the object.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the finalize
method is invoked, as
well as the interaction between finalize
and non-local returns
and exceptions, are all platform dependent.
Flushes the output stream.
Flushes the output stream. This function is required when partial output (i.e. output not terminated by a newline character) has to be made visible on the terminal.
A representation that corresponds to the dynamic class of the receiver object.
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.
not specified by SLS as a member of AnyRef
The hashCode method for reference types.
The default input, can be overridden by setIn
Test whether the dynamic type of the receiver object is T0
.
Test whether the dynamic type of the receiver object is T0
.
Note that the result of the test is modulo Scala's erasure semantics.
Therefore the expression 1.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 specified type.
true
if the receiver object is an instance of erasure of type T0
; false
otherwise.
Equivalent to !(this eq that)
.
Equivalent to !(this eq that)
.
true
if the argument is not a reference to the receiver object; false
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.
not specified by SLS as a member of AnyRef
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.
not specified by SLS as a member of AnyRef
The default output, can be overridden by setOut
Prints an object to out
using its toString
method.
Prints an object to out
using its toString
method.
the object to print; may be null.
Prints its arguments as a formatted string to the default output, based on a string pattern (in a fashion similar to printf in C).
Prints its arguments as a formatted string to the default output, 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.
if there was a problem with the format string or arguments
Prints out an object to the default output, followed by a newline character.
Prints out an object to the default output, followed by a newline character.
the object to print.
Prints a newline character on the default output.
Reads a boolean value from an entire line of the default input.
Reads a boolean value from an entire line of the default input. Has a fairly liberal interpretation of the input.
the boolean value read, or false if it couldn't be converted to a boolean
if the end of the input stream has been reached.
Reads a byte value from an entire line of the default input.
Reads a byte value from an entire line of the default input.
the Byte that was read
if the end of the input stream has been reached.
java.lang.NumberFormatExceptionif the value couldn't be converted to a Byte
Reads a char value from an entire line of the default input.
Reads a char value from an entire line of the default input.
the Char that was read
if the end of the input stream has been reached.
java.lang.StringIndexOutOfBoundsExceptionif the line read from default input was empty
Reads a double value from an entire line of the default input.
Reads a double value from an entire line of the default input.
the Double that was read.
if the end of the input stream has been reached.
java.lang.NumberFormatExceptionif the value couldn't be converted to a Float
Reads a float value from an entire line of the default input.
Reads a float value from an entire line of the default input.
the Float that was read.
if the end of the input stream has been reached.
java.lang.NumberFormatExceptionif the value couldn't be converted to a Float
Reads an int value from an entire line of the default input.
Reads an int value from an entire line of the default input.
the Int that was read
if the end of the input stream has been reached.
java.lang.NumberFormatExceptionif the value couldn't be converted to an Int
Print formatted text to the default output and read a full line from the default input.
Print formatted text to the default output and read a full line from the default input.
Returns null
if the end of the input stream has been reached.
the format of the text to print out, as in printf
.
the parameters used to instantiate the format, as in printf
.
the string read from the default input
Read a full line from the default input.
Read a full line from the default input. Returns null
if the end of the
input stream has been reached.
the string read from the terminal or null if the end of stream was reached.
Reads an long value from an entire line of the default input.
Reads an long value from an entire line of the default input.
the Long that was read
if the end of the input stream has been reached.
java.lang.NumberFormatExceptionif the value couldn't be converted to a Long
Reads a short value from an entire line of the default input.
Reads a short value from an entire line of the default input.
the short that was read
if the end of the input stream has been reached.
java.lang.NumberFormatExceptionif the value couldn't be converted to a Short
Reads in some structured input (from the default input), specified by a format specifier.
Reads in some structured input (from the default input), specified by
a format specifier. See class java.text.MessageFormat
for details of
the format specification.
the format of the input.
a list of all extracted values.
if the end of the input stream has been reached.
Reads in some structured input (from the default input), specified by a format specifier, returning only the first value extracted, according to the format specification.
Reads in some structured input (from the default input), specified by a format specifier, returning only the first value extracted, according to the format specification.
format string, as accepted by readf
.
The first value that was extracted from the input
Reads in some structured input (from the default input), specified by a format specifier, returning only the first two values extracted, according to the format specification.
Reads in some structured input (from the default input), specified by a format specifier, returning only the first two values extracted, according to the format specification.
format string, as accepted by readf
.
A scala.Tuple2 containing the first two values extracted
Reads in some structured input (from the default input), specified by a format specifier, returning only the first three values extracted, according to the format specification.
Reads in some structured input (from the default input), specified by a format specifier, returning only the first three values extracted, according to the format specification.
format string, as accepted by readf
.
A scala.Tuple3 containing the first three values extracted
Sets the default error stream.
Sets the default error stream.
the new error stream.
Sets the default error stream.
Sets the default error stream.
the new error stream.
Sets the default input stream.
Sets the default input stream.
the new input stream.
Sets the default input stream.
Sets the default input stream.
specifies the new input stream.
Sets the default output stream.
Sets the default output stream.
the new output stream.
Sets the default output stream.
Sets the default output stream.
the new output stream.
Creates a String representation of this object.
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
a String representation of the object.
Sets the default error stream for the duration of execution of one thunk.
Sets 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
the results of thunk
withErr[T](err:PrintStream)(thunk: =>T)
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
the results of thunk
withErr(Console.out) { println("This goes to default _out_") }
withErr[T](err:OutputStream)(thunk: =>T)
Sets the default input stream for the duration of execution of one thunk.
Sets 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
the results of thunk
withIn[T](reader:Reader)(thunk: =>T)
Sets the default input stream for the duration of execution of one thunk.
Sets the default input stream for the duration of execution of one thunk.
the code to execute with the new input stream active
the results of thunk
val someFile:Reader = openFile("file.txt") withIn(someFile) { // Reads a line from file.txt instead of default input println(readLine) }
withIn[T](in:InputStream)(thunk: =>T)
Sets the default output stream for the duration of execution of one thunk.
Sets 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 results of thunk
withOut[T](out:PrintStream)(thunk: => T)
Sets the default output stream for the duration of execution of one thunk.
Sets 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 results of thunk
withOut(Console.err) { println("This goes to default _error_") }
withOut[T](out:OutputStream)(thunk: => T)
Implements functionality for printing Scala values on the terminal as well as reading specific values. Also defines constants for marking up text on ANSI terminals.
1.0, 03/09/2003