JavaFX and Java Technology - JavaFX: Developing Rich Internet Applications - page 283

public String toString() {}
The object literal declaration for this is
var rand = java.util.Random {
override function toString(): String {
return "[{nextDouble()}]";
}
};
println(rand);
When declaring Java methods in JavaFX, the JavaFX syntax must be used, and the
parameters declared using the mapped JavaFX type. For example, the Java method
public double getWidth()
is represented in JavaFX as
public override function getWidth() : Double
Likewise, the Java method
public void setSize(double width, double height)
is represented as a JavaFX function:
public override function setSize(width:Double, height:Double)
: Void
The second way to instantiate a Java object from JavaFX is to use the new operator
similar to the way it is used in Java, passing any required constructor arguments.
Here is another way to create a Date object that contains the time 24 hours from
now. The variable, millis , is passed to the constructor for Date .
var millis = java.lang.System.currentTimeMillis() +
24 * 60 * 60 * 1000;
var date = new java.util.Date ( millis );
println(date);
Notice the parentheses rather than the curly braces. Arguments are converted
according to the rules outlined in the next section, Function Parameter and
Return Mapping . Also, when using the new operator, it is not possible to override
any of the Java object's methods. Of course, if the Java class is an interface or
abstract class, it cannot be instantiated this way. It needs a subclass to implement
the abstract methods.