Bug 573289 - [cleanup] String.strip().isEmpty() => String.isBlank()

String.isBlank() rather than String.strip().isEmpty()

String.isBlank() is shorter than checking the stripped string or
checking the length of the stripped string and it avoids the creation of
an intermediate trimmed string.

To apply the cleanup also to String.trim().isEmpty() (which is probably
more common than String.strip().isEmpty(), since strip() exists only
since Java 11), trim() must first be replaced by strip() which may
change the runtime behavior.

Given:
if (input.strip().isEmpty()) {
    System.err.println("Input must not be blank");
}
boolean hasComment = comment.strip().length() > 0;

When:
Clean up the code enabling "String.isBlank() rather than
String.strip().isEmpty()" and using Java 11 or higher

Then:
if (input.isBlank()) {
    System.err.println("Input must not be blank");
}
boolean hasComment = !comment.isBlank();

Also use Java 12 Runtime jar for the Java 11 tests instead of Java 10
Runtime jar

Change-Id: I072b6e18fa951ab9901e3363b55be2c18654888f
Signed-off-by: Holger Voormann <eclipse@voormann.de>
Reviewed-on: https://git.eclipse.org/r/c/jdt/eclipse.jdt.ui/+/180067
Tested-by: JDT Bot <jdt-bot@eclipse.org>
Reviewed-by: Fabrice Tiercelin <fabrice.tiercelin@yahoo.fr>
11 files changed
tree: 70e93aaaf7d79443ab9f529f67c573b2859cf667
  1. org.eclipse.jdt.astview/
  2. org.eclipse.jdt.astview.feature/
  3. org.eclipse.jdt.core.manipulation/
  4. org.eclipse.jdt.jeview/
  5. org.eclipse.jdt.jeview.feature/
  6. org.eclipse.jdt.junit/
  7. org.eclipse.jdt.junit.core/
  8. org.eclipse.jdt.junit.runtime/
  9. org.eclipse.jdt.junit4.runtime/
  10. org.eclipse.jdt.junit5.runtime/
  11. org.eclipse.jdt.text.tests/
  12. org.eclipse.jdt.ui/
  13. org.eclipse.jdt.ui.examples.javafamily/
  14. org.eclipse.jdt.ui.examples.projects/
  15. org.eclipse.jdt.ui.junit.sampleproject/
  16. org.eclipse.jdt.ui.tests/
  17. org.eclipse.jdt.ui.tests.refactoring/
  18. org.eclipse.jdt.ui.unittest.junit/
  19. org.eclipse.jdt.ui.unittest.junit.feature/
  20. org.eclipse.ltk.core.refactoring/
  21. org.eclipse.ltk.core.refactoring.tests/
  22. org.eclipse.ltk.ui.refactoring/
  23. org.eclipse.ltk.ui.refactoring.tests/
  24. tests-pom/
  25. .gitignore
  26. CONTRIBUTING
  27. LICENSE
  28. NOTICE
  29. pom.xml
  30. README.md
README.md

Contributing to JDT UI - Java development tools UI

Thanks for your interest in this project.

Project description:

The JDT UI implements the user interface for the Java IDE. This includes views like Package Explorer and JUnit, the Java and properties files editors, Java search, and refactorings. Website: http://www.eclipse.org/jdt/ui/

How to contribute:

Contributions to JDT UI are most welcome. There are many ways to contribute, from entering high quality bug reports, to contributing code or documentation changes. For a complete guide, see the [How to Contribute] 1 page on the team wiki.

Developer resources:

Information regarding source code management, builds, coding standards, and more.

Contributor License Agreement:

Before your contribution can be accepted by the project, you need to create and electronically sign the Eclipse Foundation Contributor License Agreement (CLA).

Forum:

Public forum for Eclipse JDT users.

Search for bugs:

This project uses Bugzilla to track ongoing development and issues.

Create a new bug:

Be sure to search for existing bugs before you create another one. Remember that contributions are always welcome!

Contact:

Contact the project developers via the project's “dev” list.

License

Eclipse Public License (EPL) v2.0