In eclipse, an internal error occurred during: "Building Workspace". Java heap space) is reported)

When extjs4 is added to the eclipse web project,
Internal error occurred during: "Building workspace ".

Java heap space error.

Solution 1: Leave the extjs4 project installation package in the web project as OK or use the exjts4 package directly imported by myeclipse.

Solution 2: import the extjs package, so that eclipse is stuck. Go to the project root directory, find the. Project, open it in notepad, and delete the two parts:
 
Article 1:
 
<Buildcommand>
<Name> org. Eclipse. WST. jsdt. Core. javascriptvalidator </Name>
<Arguments>
</Arguments>
</Buildcommand>
Second:
 
<Nature> org. Eclipse. WST. jsdt. Core. jsnature </nature>
 
Save and exit. Refresh the project. Copy the ext package to the project.