Mac OS X (10.5 and Higher)

1. Click on the Apple icon at the top left of the screen
2. Click the System Preferences icon to open 
3. Click on the Java icon located under the Other section to open the Java Control Panel 

   

4. Click on Settings under Temporary Internet Files

   

5. Click on the Delete Files button on Temporary Internet Files
6. This will open the Delete Files and Applications window, click OK

   

Read more about clearing the Java Cache in MacOS X here. 

Windows

Open the Java Control Panel:

• Windows 7
  1. Open the Start menu and click on Control Panel.
  2. In the Control Panel Search type Java Control Panel.
  3. Click on the Java icon to open the Java Control Panel.

• Windows 8

  1. Move your mouse to one of the two right-hand corners of your screen to reveal the Charms Menu and click on the Search icon.
  2. In the search box that appears on the right-hand side of the screen, type Java Control Panel.
  3. Click on the Java icon to open the Java Control Panel.

• Windows 10

1. Click on the Cortana Start Button and select Control Panel.
2. In the Control Panel, search Java Control Panel
3. Click the Settings..button. (located under the General tab of the Java Control Panel.)
4. Click Delete Files.
5. Click the check boxes by the files that you would like to delete & Click OK.

Clear the Cache Using the Java Control Panel:

1. In the Java Control Panel, go to the General tab.
2. Under the "Temporary Internet Files" section, select the Settings button.
3. The "Temporary Files Settings" dialog box should appear. Click the Delete Files... button.
4. Verify all options in the "Delete Temporary Files" window are checked, then click OK.
5. Click OK in the "Temporary Files Settings" dialog.

Read more about clearing the Java Cache in Windows here.

This document was adapted from a Java Support article.