CSC300: What to do you have lots of red marks in Eclipse [3/6]

Suppose you had eclipse working and then one day, eclipse looks like this:

Try

  "Project" > "Clean..." > "Clean all projects"

If that does not work, try deleting potentially problematic files to re-create a fresh eclipse-workspace:

• Exit eclipse

• Using the finder or terminal, remove the following files/directories:

  • eclipse-workspace/.metadata
  • eclipse-workspace/algs4/.classpath
  • eclipse-workspace/algs4/.project

  If you are using finder on a mac, you may need to make these files visible. To do this, press "Command-Shift-. (period)"

• Restart eclipse. You should have a blank eclipse-workspace.

• Follow the previous instructions to show the algs4 project, by following the previous instructions to install the code from class, starting with File > New > Java Project