Eclipse Flash-back issues

Yesterday, nothing to do, download the latest eclipse version from the Eclipse official website, unzip the installation, then removed the previous installation of Eclipse, then click on the new installation of Eclipse Flash back, after several twists and turns finally resolved. Method 1. At the command line, enter the where Java to remove all Java-related programs except the JDK path, reboot a bit; Method 2. Open the Eclipse.ini file under the Eclipse directory and add the-VM "Java.exe absolute path" before-vmargs (mine is the F drive EG:-VM F:\java\ BIN-VMARGS-DOSGI.REQUIREDJAVAVERSION=1.7-XMS40M-XMX512M) previously solved a similar problem through this method, this time did not succeed; Method 3: Insufficient memory to open the Eclipse directory of the Eclipse.ini, the inside of the-xmx512m to change to-xmx256m; Method 4: Check the environment variables, the PATH variable places the JRE path in the JDK at the front (".;" at the beginning) Directly behind); Method 5: The legendary Universal solution (is not really omnipotent not clear, I am this way to solve), the JDK directory under the JRE directory directly copied to the Eclipse directory. Method 6: It was once eclipse normal operation, because of various and then suddenly have a flashback problem, using Method 2 did not succeed, just open the Eclipse workspace directory, delete the. Metadata directory, of course, the previous project was cleared away. Method 7:in the Eclipse folder there is a Eclipsec.exe program, run the program on the command line, you will get the problem corresponding error message. You can use this command to get hints to search for your solution. Some of the methods are excerpted from the Internet and have not been tried in person.