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Why doesn't java.lang.Number implement Comparable? [duplicate]
Does anyone know why java.lang.Number does not implement Comparable ? This means that you cannot sort Number s with Collections.sort which seems to me a little strange.
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Can I multiply strings in Java to repeat sequences? [duplicate]
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The easiest way in plain Java with no dependencies is the following one-liner:
new String(new char[generation]).replace("\0", "-")
Replace generation with number of repetitions, and the "-" with the string (or char) you want repeated.
All this do...
Understanding checked vs unchecked exceptions in Java
Joshua Bloch in " Effective Java " said that
21 Answers
21
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Do interfaces inherit from Object class in java
Do interfaces inherit from Object class in Java?
7 Answers
7
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Recommended method for escaping HTML in Java
...e < , > , " and & characters when outputting HTML in plain Java code? (Other than manually doing the following, that is).
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Eclipse - java.lang.ClassNotFoundException
...ut folder that maven would use.
For example, your web project's src/main/java should have target/classes under the web project, test classes should have target/test-classes also under the web project and so.
Using this configuration will allow you to execute unit tests in eclipse.
Just one more ...
Is there anything like .NET's NotImplementedException in Java?
Is there anything like .NET's NotImplementedException in Java?
5 Answers
5
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Common programming mistakes for Clojure developers to avoid [closed]
... to define a var with this matrix, however, would fail mysteriously with:
java.lang.NumberFormatException: Invalid number: 08
which totally baffled me. The reason is that Clojure treats literal integer values with leading zeros as octals, and there is no number 08 in octal.
I should also mention...
“java.lang.OutOfMemoryError: PermGen space” in Maven build [duplicate]
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Unfortunatelly it changes with Java versions, so some standardisation might be still required. (For example using %JAVA_1_7_HOME% like Apache Commons is doing (since toolchain might not be ready for beeing used in those situations).
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Is it expensive to use try-catch blocks even if an exception is never thrown?
...to catch exceptions. But, is it also expensive to use a try-catch block in Java even if an exception is never thrown?
7 An...