Java Open Clients can return array values (called extents in ABL) from user-defined functions.

The following table provides the data type mappings for array parameters.

Table 1. Data type mappings between ABL and Java array types

ABL type with EXTENT	Java proxy return typefor values	Java proxy return typefor unknown
INTEGER	int[ ]	Integer[]
INT64	long[]	Long[]
DECIMAL	java.math.BigDecimal[ ]
CHARACTER	java.lang.String[ ]
LOGICAL	boolean[ ]	Boolean[]
DATE DATETIME DATETIME-TZ	java.util.GregorianCalendar[ ]
RECID	long[ ]
RAW	byte[ ][ ]
ROWID	com.progress.open4gl.Rowid[ ]
COM-HANDLE	com.progress.open4gl.COMHandle[ ]
WIDGET-HANDLE	com.progress.open4gl.Handle[ ]