Debug Project New and Noteworthy for 3.2M4

Execution environments

You can now specify a JRE to use for running, debugging and building based on execution environment. An execution environment describes the capabilities of a runtime - for example, J2SE-1.4. The new Execution Environments preference page displays the JREs installed in your workspace compatible with each execution environment. JREs that meet the exact requirements of an execution environment are displayed in bold, and JREs that surpass the requirements of an environment are displayed in the default font. When more than one JRE is compatible with an execution environment, you can select a default JRE to use for that environment by checking it.

A build path or launch configuration referencing an execution environment is more portable than one referencing an explicit JRE as a JRE's exeuction environment can be resolved independant of its name. Use the JRE tab or Edit Library wizard to specify an execution environment for running and building.