Starting from the Eclipse 2.0 version, it has been aware of it. 3.0 has been used for a long time. With the proportion of Project in the Eclipse, the occupation of the occupation has increased, often Project can't build Automatically, sometimes Search A Workspace or Refactor when Update Reference is popped up, the annoying Out of Memory is popped up, but the memory is 512 256 M. But in addition to eclipse, can I love? JBUILDER? NetBeans? NO, NO! Oh, come to the skill, in the DOS command line CD to the Eclipse installation directory, knock in: Eclipse.exe -vmargs -xverify: None -xx: UseParalLGC -XX: Permsize = 20m -xmx512m increases the utilization of memory.