SingleInstanceService (Java SE 10 & JDK 10 )

java.lang.Object
- jdk.packager.services.singleton.SingleInstanceService

```
public class SingleInstanceService
extends Object
```
The SingleInstanceService class provides public methods for using Single Instance functionality for Java Packager. To use these methods, the option named "-singleton" must be specified on javapackager command line.

Since:

10

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`registerSingleInstance(SingleInstanceListener slistener)`	Registers `SingleInstanceListener` for current process.
`static void`	`registerSingleInstance(SingleInstanceListener slistener, boolean setFileHandler)`	Registers `SingleInstanceListener` for current process.
`static void`	`unregisterSingleInstance(SingleInstanceListener slistener)`	Unregisters `SingleInstanceListener` for current process.

Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - registerSingleInstance
```
public static void registerSingleInstance(SingleInstanceListener slistener)
```
    Registers SingleInstanceListener for current process. If the SingleInstanceListener object is already registered, or slistener is null, then the registration is skipped.
    
    Parameters:
    
    slistener - the listener to handle the single instance behaviour.
  - registerSingleInstance
```
public static void registerSingleInstance(SingleInstanceListener slistener,
                                          boolean setFileHandler)
```
    Registers SingleInstanceListener for current process. If the SingleInstanceListener object is already registered, or slistener is null, then the registration is skipped.
    
    Parameters:
    
    slistener - the listener to handle the single instance behaviour.
    
    setFileHandler - if true, the listener is notified when the application is asked to open a list of files. If OS is not MacOS, the parameter is ignored.
  - unregisterSingleInstance
```
public static void unregisterSingleInstance(SingleInstanceListener slistener)
```
    Unregisters SingleInstanceListener for current process. If the SingleInstanceListener object is not registered, or slistener is null, then the unregistration is skipped.
    
    Parameters:
    
    slistener - the listener for unregistering.