How do I know if Java is running or not?

1. Open command prompt and enter “java –version”. If installed version number is displayed.

How do I enable Java on Linux?

Enabling the Java Console for Linux or Solaris

1. Open a Terminal window.
2. Go to the Java installation directory. …
3. Open the Java Control Panel. …
4. In the Java Control Panel, click the Advanced tab.
5. Select Show console under the Java Console section.
6. Click the Apply button.