Uses of Class
com.wolfram.jlink.Expr

Packages that use Expr

Package	Description
com.wolfram.jlink	This is the main J/Link package, containing the classes and interfaces that programmers will use most.

Uses of Expr in com.wolfram.jlink

Fields in com.wolfram.jlink declared as Expr

Modifier and Type	Field	Description
static Expr	Expr.INT_MINUSONE	Unused for now.
static Expr	Expr.INT_ONE	Unused for now.
static Expr	Expr.INT_ZERO	Unused for now.
static Expr	Expr.SYM_COMPLEX	Unused for now.
static Expr	Expr.SYM_FALSE	Unused for now.
static Expr	Expr.SYM_INTEGER	Unused for now.
static Expr	Expr.SYM_LIST	Unused for now.
static Expr	Expr.SYM_NULL	Unused for now.
static Expr	Expr.SYM_RATIONAL	Unused for now.
static Expr	Expr.SYM_REAL	Unused for now.
static Expr	Expr.SYM_STRING	Unused for now.
static Expr	Expr.SYM_SYMBOL	Unused for now.
static Expr	Expr.SYM_TRUE	Unused for now.

Methods in com.wolfram.jlink that return Expr

Modifier and Type	Method	Description
Expr[]	Expr.args()	Gives an array of Exprs representing the arguments of this Expr.
protected Expr	MathListener.callMathHandler(java.lang.String meth, java.lang.Object[] args)	Derived classes call this method from their event handler methods.
static Expr	Expr.createFromLink(MathLink ml)	This factory method will only be used by advanced programmers who are creating their own classes that implement the MathLink interface.
Expr	Expr.delete(int n)	Returns a new Expr that has the same head but the nth element deleted (counted from the end if n is negative).
Expr	KernelLink.enableObjectReferences(boolean becomeDefaultJVM)	Call this method to enable the ability to pass Java objects "by reference" to Mathematica.
Expr	MathLink.getExpr()	Reads an expression from the link and creates an Expr from it.
Expr	Expr.head()	Gives a new Expr representing the head of this Expr.
Expr	Expr.insert(Expr e, int n)	Returns a new Expr that has the same head but with e inserted into position n (counted from the end if n is negative).
Expr	Expr.part(int i)	Gives a new Expr representing the specified part of this Expr.
Expr	Expr.part(int[] ia)	Gives a new Expr representing the specified part of this Expr.
Expr	MathLink.peekExpr()	Creates an Expr from the current expression, but does not drain it off the link.
Expr	Expr.take(int n)	Returns a new Expr that has the same head but only the first n elements of this Expr (or last n elements if n is negative).

Methods in com.wolfram.jlink that return types with arguments of type Expr

Modifier and Type	Method	Description
java.util.Iterator<Expr>	Expr.iterator()	Provides an Iterator to traverse this expression's arguments.

Methods in com.wolfram.jlink with parameters of type Expr

Modifier and Type	Method	Description
void	KernelLink.evaluate(Expr e)	Sends an Expr for evaluation.
byte[]	KernelLink.evaluateToImage(Expr e, int width, int height)	Sends graphics or plotting code to evaluate, then reads and discards all output except for the image data, which is returned as a byte array of GIF data.
byte[]	KernelLink.evaluateToImage(Expr e, int width, int height, int dpi, boolean useFE)	Sends graphics or plotting code to evaluate, then reads and discards all output except for the image data, which is returned as a byte array of GIF data.
java.lang.String	KernelLink.evaluateToInputForm(Expr e, int pageWidth)	Sends an Expr to evaluate, then reads and discards all output except for the result, which is returned.
java.lang.String	KernelLink.evaluateToOutputForm(Expr e, int pageWidth)	Sends an Expr to evaluate, then reads and discards all output except for the result, which is returned.
byte[]	KernelLink.evaluateToTypeset(Expr e, int width, boolean useStdForm)	Sends an Expr to evaluate, the result of which will be typeset, converted to a GIF, and the resulting data returned.
Expr	Expr.insert(Expr e, int n)	Returns a new Expr that has the same head but with e inserted into position n (counted from the end if n is negative).

Constructors in com.wolfram.jlink with parameters of type Expr

Constructor	Description
Expr(Expr head, Expr... args)	Creates an Expr with the given head and arguments.
Expr(java.lang.String head, Expr... args)	Creates an Expr with the given head and arguments.