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Usage: java [-options] class [args...]
(to execute a class)
or java [-options] -jar jarfile [args...]
(to execute a jar file)
where options include:
-d32 use a 32-bit data model if available
-d64 use a 64-bit data model if available
-client to select the "client" VM
-server to select the "server" VM
-hotspot is a synonym for the "client" VM [deprecated]
The default VM is client.
-cp <class search path of directories and zip/jar files>
-classpath <class search path of directories and zip/jar files>
A ; separated list of directories, JAR archives,
and ZIP archives to search for class files.
set a system property
enable verbose output
-version print product version and exit
require the specified version to run
-showversion print product version and continue
-jre-restrict-search | -no-jre-restrict-search
include/exclude user private JREs in the version search
-? -help print this help message
-X print help on non-standard options
enable assertions with specified granularity
disable assertions with specified granularity
-esa | -enablesystemassertions
enable system assertions
-dsa | -disablesystemassertions
disable system assertions
load native agent library <libname>, e.g. -agentlib:hprof
see also, -agentlib:jdwp=help and -agentlib:hprof=help
load native agent library by full pathname
load Java programming language agent, see java.lang.instrument
show splash screen with specified image
-1 is not negative.
After enabling assertion why it isn't enable when i ran program ?
If I'm wrong here then, could you please explain me meaning of first point in both snaps.
My one regret in life is that I am not someone else.
- Woody Allen
They don't mean "no arguments to the java command". They're talking about arguments to the switches. Note from the examples that you can provide arguments to that using a colon. But they aren't examples of complete java calls, just the bits they're talking about.
So you can do this to run SimpleAssert with assertions turned on everywhere:
java -ea SimpleAssert
And you can do this to turn on assertions only in a particular package, while running SimpleAssert: