Instantiate a Java class

In Java, objects are created with the new instruction. To create a new Java object in BDL, you must use the class-name.create() method, and assign the returned value to a program variable declared with the Java class name:

IMPORT JAVA java.lang.StringBuffer
MAIN
    DEFINE sb StringBuffer
    LET sb = StringBuffer.create()
END MAIN

If the Java class constructor uses parameters, pass the parameters to the create() method:

IMPORT JAVA java.lang.StringBuffer
MAIN
    DEFINE sb1, sb2 StringBuffer
    -- Next code line uses StringBuffer(String str) constructor
    LET sb1 = StringBuffer.create("abcdef")
    -- Next code line uses StringBuffer(int capacity) constructor
    LET sb2 = StringBuffer.create(2048)
END MAIN

It is not possible to use Java generic types such as java.util.Vector<E>, with a type parameter (for example, in pure Java: Vector<MyClass> v = new Vector<MyClass>() ). However, it is possible to instantiate such classes without a type parameter by using the class-name.create() method (in pure Java: Vector v = new Vector()):

IMPORT JAVA java.util.Vector
MAIN
    DEFINE v java.util.Vector
    LET v = java.util.Vector.create()
    ...
END MAIN