For convenience, copybook javatypes.cpy defines a set of COBOL data types corresponding to Java data types - you can use these as a shorthand way of declaring data items for use with Java in your COBOL programs. You can find the copybook in your %ProgramFiles(x86)%\Micro Focus\Visual COBOL\cpylib (Windows) or $COBDIR/cpylib (UNIX) directory.
These typedefs all start with the prefix "j" and are shown in the following table:
| Typedef | COBOL Type | 
|---|---|
| jbyte | pic s99 comp-5 | 
| jshort | pic s9(4) comp-5 | 
| jint | pic s9(9) comp-5 | 
| jlong | pic s9(18) comp-5 | 
| jboolean JNI-TRUE is true JNI-FALSE is false | pic 99 comp-5 | 
| jchar | pic 9(4) comp-5 | 
| jfloat | comp-1 | 
| jdouble | comp-2 | 
| jobject | pointer | 
| jbigdecimal | pic s9(19)v9(19) comp-3 Programs that use this typedef must be compiled with the directive INTLEVEL 4 | 
| jbiginteger | pic s9(38) comp-3 Programs that use this typedef must be compiled with the directive INTLEVEL 4 | 
| mf-sql-date (in javatypes.cpy) | 0x jyear pic 9(4). 0x filler pic x. 0x jmonth pic 99. 0x filler pic x. 0x jday pic 99. | 
| mf-sql-time (in javatypes.cpy) | 0x jhour pic 99. 0x filler pic x. 0x jminute pic 99. 0x filler pic x. 0x jseconds pic 99. |