Scilab Website | Contribute with GitLab | Scilab Community | ATOMS toolboxes
Scilab Online Help
2027.0.0 - English


jexists

Test if a Scilab Java Object is valid on the Java side

Syntax

bool = jexists(obj)

Arguments

obj

A mlist typed _JObj or _JClass

bool

A boolean

Description

Returns true if the corresponding Java object is always valid. An object can be invalidated with jremove.

Examples

jimport java.lang.Double;
d = Double.new("1.23456");
jexists(d)
jremove d;
jexists(d) // Will fail

See also

  • jremove — Remove a Java Object on the Java side

History

VersionDescription
5.5.0

Function introduced. Based on the 'JIMS' module. The main difference in the behavior compared to the JIMS module is that jautoUnwrap is enabled by default.

Report an issue
<< jenableTrace Java from Scilab jgetclassname >>
Copyright (c) 2022-2026 (Dassault Systèmes S.E.)
Copyright (c) 2017-2022 (ESI Group)
Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors 		Last updated:
Thu Oct 15 10:21:41 CEST 2026