all I have installed both JDK 1.7 update 21(1.7.0.210) and 51(1.7.0.510), and so I wonder do I need to uninstall the older version which is JDK 1.7 update 21, as they both show up in the list of Programs and Features on Windows. Second, I tried Java Uninstall Tool, it only reports There are no older versions of Java on your computer. So I wonder can I just use the Programs and Features that manually uninstall any version of Java if I need to.
Another question is that I am using Eclipse doing Java and Android programming, so I wonder if I remove the older version of Java, will it affect the compiler settings in Eclipse, since Eclipse is kinda automatically detects your JDK versions and hence sets Compiler compliance level in Preferences.
Java Removal Tool Windows 10
However, even after the 30 days is up, and you have made your peace with Windows 10, the old version of Windows remains on your hard drive taking up valuable space in a folder labeled Windows.old. Because there are system files involved, you cannot just delete the folder — oh no, you have to go through an obscure special process. Remove Previous Versions of Java 8 Runtime During Upgrade UPDATE: As of version 1.3.3, The Patch My PC publishing service has added support for recommended Pre/Post-Scripts. Included in these recommended scripts are pre-scripts that will remove the previous version of Java 8 or Java SE. Locate Java in the list of programs, select it by single-clicking its name, then click the 'Uninstall' or 'Remove' button.
cheers
daiyuedaiyue