@Exported public class VMOption extends Object
origin.
 Each VM option has a default value. A VM option can be set at VM creation time typically as a command line argument to the launcher or an argument passed to the VM created using the JNI invocation interface. In addition, a VM option may be set via an environment variable or a configuration file. A VM option can also be set dynamically via a management interface after the VM was started. A VMOption contains the value of a VM option and the origin of that value at the time this VMOption object was constructed. The value of the VM option may be changed after the VMOption object was constructed,
| Modifier and Type | Class and Description | 
|---|---|
| static class  | VMOption.OriginOrigin of the value of a VM option. | 
| Constructor and Description | 
|---|
| VMOption(String name,
        String value,
        boolean writeable,
        VMOption.Origin origin)Constructs a VMOption. | 
| Modifier and Type | Method and Description | 
|---|---|
| static VMOption | from(CompositeData cd)Returns a VMOption object represented by the
 given CompositeData. | 
| String | getName()Returns the name of this VM option. | 
| VMOption.Origin | getOrigin()Returns the origin of the value of this VM option. | 
| String | getValue()Returns the value of this VM option at the time when
 this VMOption was created. | 
| boolean | isWriteable()Tests if this VM option is writeable. | 
| String | toString()Returns a string representation of the object. | 
public VMOption(String name, String value, boolean writeable, VMOption.Origin origin)
name - Name of a VM option.value - Value of a VM option.writeable - true if a VM option can be set dynamically,
                  or false otherwise.origin - where the value of a VM option came from.NullPointerException - if the name or value is nullpublic String getName()
public String getValue()
public VMOption.Origin getOrigin()
public boolean isWriteable()
HotSpotDiagnosticMXBean.setVMOption method.public String toString()
java.lang.ObjecttoString method returns a string that
 "textually represents" this object. The result should
 be a concise but informative representation that is easy for a
 person to read.
 It is recommended that all subclasses override this method.
 
 The toString method for class Object
 returns a string consisting of the name of the class of which the
 object is an instance, the at-sign character `@', and
 the unsigned hexadecimal representation of the hash code of the
 object. In other words, this method returns a string equal to the
 value of:
 
getClass().getName() + '@' + Integer.toHexString(hashCode())
public static VMOption from(CompositeData cd)
Attribute Name Type name java.lang.String value java.lang.String origin java.lang.String writeable java.lang.Boolean 
cd - CompositeData representing a VMOptionIllegalArgumentException - if cd does not
   represent a VMOption with the attributes described
   above.
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