How to set javax.net.ssl.truststore path in Linux?

When I tried to execute the SSLClient by setting the java path over command line, it works perfectly:

java -cp . -Djavax.net.ssl.trustStore=public.jks <Clientprogram>

But when I try to set inside the program following the statement, it fails with the error:

javax.net.ssl.SSLHandshakeException:

sun.security.validator.ValidatorException: PKIX path building failed: sun.

security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target System.setProperty("javax.net.ssl.trustStore", "/Users/abc/Desktop/Folder/public.jks");

I'm running program on Linux machine. What could be the issue?