Package Summary Overview Summary

### class:VMOption [NONE]
public class VMOption extends Object Information about a VM option including its value and where the value came from which is referred as its `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, Since: 1.6

### constructor:VMOption(java.lang.String,java.lang.String,boolean,com.sun.management.VMOption.Origin) [NONE]
### VMOption public VMOption (String name, String value, boolean writeable, VMOption.Origin origin) Constructs a `VMOption`. Parameters: `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. Throws: `NullPointerException` - if the name or value is `null`

### method:getName() [NONE]
### getName public String getName() Returns the name of this VM option. Returns: the name of this VM option.

### method:getValue() [NONE]
### getValue public String getValue() Returns the value of this VM option at the time when this `VMOption` was created. The value could have been changed. Returns: the value of the VM option at the time when this `VMOption` was created.

### method:getOrigin() [NONE]
### getOrigin public VMOption.Origin getOrigin() Returns the origin of the value of this VM option. That is, where the value of this VM option came from. Returns: where the value of this VM option came from.

### method:isWriteable() [NONE]
### isWriteable public boolean isWriteable() Tests if this VM option is writeable. If this VM option is writeable, it can be set by the `HotSpotDiagnosticMXBean.setVMOption` method. Returns: `true` if this VM option is writeable; `false` otherwise.

### method:from(javax.management.openmbean.CompositeData) [NONE]
> ### from public static VMOption from (CompositeData cd) Returns a `VMOption` object represented by the given `CompositeData`. The given `CompositeData` must contain the following attributes:
> description
> Attribute Name | Type
> --- | ---
> name | `java.lang.String`
> value | `java.lang.String`
> origin | `java.lang.String`
> writeable | `java.lang.Boolean`
Parameters: `cd` - `CompositeData` representing a `VMOption` Returns: a `VMOption` object represented by `cd` if `cd` is not `null`; `null` otherwise. Throws: `IllegalArgumentException` - if `cd` does not represent a `VMOption` with the attributes described above.