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Fixing errors in Android Java applications

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Stephen Gilmore
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Java problems Raw type parameters Working with the Java compiler Logging Static analysis CS/SE Individual Practical Stephen Gilmore November 11, 2011 School of Informatics, University of Edinburgh CS/SE Individual Practical 1 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems Common Java problems: raw types CS/SE Individual Practical 2 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems Quick fix: a bad suggestion CS/SE Individual Practical 3 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems Check the constructor documentation CS/SE Individual Practical 4 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems Check the class documentation CS/SE Individual Practical 5 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems What type of array are we adapting? CS/SE Individual Practical 6 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems Type parameter added CS/SE Individual Practical 7 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Raw type in method header CS/SE Individual Practical 8 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Consult the Java documentation CS/SE Individual Practical 9 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Adapter doesn’t work here CS/SE Individual Practical 10 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Adapter is an interface CS/SE Individual Practical 11 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters T is not a class CS/SE Individual Practical 12 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Object: the goto class CS/SE Individual Practical 13 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters T extends Adapter doesn’t work CS/SE Individual Practical 14 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters “?” — the wild card parameter CS/SE Individual Practical 15 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters “Quick fix” would have worked here CS/SE Individual Practical 16 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Same result CS/SE Individual Practical 17 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Working with the Java compiler Setting Java compiler preferences CS/SE Individual Practical 18 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Working with the Java compiler Changing defaults CS/SE Individual Practical 19 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Working with the Java compiler Potential programming problems CS/SE Individual Practical 20 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Working with the Java compiler Tighter checking CS/SE Individual Practical 21 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Working with the Java compiler Bug found CS/SE Individual Practical 22 / 24
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Logging Don’t forget to add logging . . . CS/SE Individual Practical 23 / 24 .41.02.png
Java problems Raw type parameters Working with the Java compiler Logging Static analysis Static analysis Deeper analysis (resource leaks . . . ) CS/SE Individual Practical 24 / 24

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Fixing errors in Android Java applications

  • 1. Java problems Raw type parameters Working with the Java compiler Logging Static analysis CS/SE Individual Practical Stephen Gilmore November 11, 2011 School of Informatics, University of Edinburgh CS/SE Individual Practical 1 / 24
  • 2. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems Common Java problems: raw types CS/SE Individual Practical 2 / 24
  • 3. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems Quick fix: a bad suggestion CS/SE Individual Practical 3 / 24
  • 4. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems Check the constructor documentation CS/SE Individual Practical 4 / 24
  • 5. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems Check the class documentation CS/SE Individual Practical 5 / 24
  • 6. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems What type of array are we adapting? CS/SE Individual Practical 6 / 24
  • 7. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Java problems Type parameter added CS/SE Individual Practical 7 / 24
  • 8. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Raw type in method header CS/SE Individual Practical 8 / 24
  • 9. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Consult the Java documentation CS/SE Individual Practical 9 / 24
  • 10. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Adapter doesn’t work here CS/SE Individual Practical 10 / 24
  • 11. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Adapter is an interface CS/SE Individual Practical 11 / 24
  • 12. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters T is not a class CS/SE Individual Practical 12 / 24
  • 13. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Object: the goto class CS/SE Individual Practical 13 / 24
  • 14. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters T extends Adapter doesn’t work CS/SE Individual Practical 14 / 24
  • 15. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters “?” — the wild card parameter CS/SE Individual Practical 15 / 24
  • 16. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters “Quick fix” would have worked here CS/SE Individual Practical 16 / 24
  • 17. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Raw type parameters Same result CS/SE Individual Practical 17 / 24
  • 18. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Working with the Java compiler Setting Java compiler preferences CS/SE Individual Practical 18 / 24
  • 19. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Working with the Java compiler Changing defaults CS/SE Individual Practical 19 / 24
  • 20. Java problems Raw type parameters Working with the Java compiler Logging Static analysis Working with the Java compiler Potential programming problems CS/SE Individual Practical 20 / 24
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