解决Ubuntu IDEA2019版本 无法启动报错的问题

本人使用的IDEA版本是2019版本，系统是Ubuntu16.04LTS。不过这个应该和启动闪退的关系不大。其他系统如macOS遇到无法启动的问题，也可以使用下面的方法步骤。

1.找到IDEA的安装目录

我的安装目录在：/home/software/idea-IU-193.5662.53 下，这个具体视系统不同可能位置有所差异

2.进入系统的启动命令目录

cd /bin 后可以看到有个 idea.sh的shell脚本。在这里执行该脚本。命令 ./idea.sh

我的这里执行后，提示如下内容：

OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Error occurred during initialization of VM
Initial heap size set to a larger value than the maximum heap size

　通过报错可以看出来是IDEA启动的对堆内存大小设置问题。可能是之前自己设置过值，导致退出IDEA后无法启动了。

3.返回上一目录，找到IDEA的具体安装信息

我这里的安装配置文件是：Install-Linux-tar.txt，打开后可以看到具体的安装路径，在下面的文件内标红的部分，也就是 ~/.IntelliJIdea2019.3/config

IntelliJ IDEA

INSTALLATION INSTRUCTIONS
===============================================================================

  Linux Installation Instructions
  ------------------------------------------------------------------------------
  1. Unpack the IntelliJ IDEA distribution archive that you downloaded to
     where you wish to install the program. We will refer to this destination
     location as your {installation home} below.

  2. Open a console and cd into "{installation home}/bin" and type:

       ./idea.sh

     to start the application. As a side effect, this will initialize various
     configuration files in the ~/.IntelliJIdea2019.3 directory.

  3. [OPTIONAL] Add "{installation home}/bin" to your PATH environment
     variable so that you may start IntelliJ IDEA from any directory.

  4. [OPTIONAL] To adjust the value of the JVM heap size, create
      ~/.IntelliJIdea2019.3/config/idea.vmoptions (or idea64.vmoptions
      if using a 64-bit JDK), and set the -Xms and -Xmx parameters. To see how
      to do this, you can reference the vmoptions file under
      "{installation home}/bin" as a model.

  [OPTIONAL] Changing the location of "config" and "system" directories
  ------------------------------------------------------------------------------
  By default, IntelliJ IDEA stores all your settings under the ~/.IntelliJIdea2019.3/config
  directory and uses ~/.IntelliJIdea2019.3/system as a data cache.
  If you want to change these settings,

  1. Open a console and cd into ~/.IntelliJIdea2019.3/config

  2. Create the file "idea.properties" and open it in an editor. Set the
     idea.system.path and/or idea.config.path variables as desired, for
     example:

     idea.system.path=~/custom/system
     idea.config.path=~/custom/config

  3. Note that we recommend to store data cache ("system" directory) on a disk
     with at least 1GB of free space.


Enjoy!

-IntelliJ IDEA Development Team

然后cd到 ~/.IntelliJIdea2019.3/config 目录下，调整idea64.vmoptions的-Xms(最小堆内存:一般设置为256m)与-Xmx（最大堆内存，一般设置为512m）的值即可

最终问题解决