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How to remove a key from HashMap while iterating over it? [duplicate]
...equalsIgnoreCase(entry.getValue())){
iter.remove();
}
}
With Java 1.8 and onwards you can do the above in just one line:
testMap.entrySet().removeIf(entry -> "Sample".equalsIgnoreCase(entry.getValue()));
s...
Detecting Windows or Linux? [duplicate]
I am seeking to run a common Java program in both Windows and Linux.
5 Answers
5
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org.apache.tomcat.util.modeler.ManagedBean tomcat启动不了 - 更多技术 -...
org.apache.tomcat.util.modeler.ManagedBean tomcat启动不了java版本太低了，下载新版本java：http: www.oracle.com technetwork java javase downloads jdk6-jsp-136632.htmljava版本太低了，下载新版本java：
http://www.oracle.com/technetwork/java/javase/downloads/jdk6-jsp-136632.h...
java.lang.UnsatisfiedLinkError: No implementation found for void or......
https://blog.csdn.net/sinat_31057219/article/details/116784189
https://developer.aliyun.com/article/240181
Run single test from a JUnit class using command-line
...low me to run a single test from a JUnit class using only command-line and java.
3 Answers
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Data structure: insert, remove, contains, get random element, all at O(1)
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@aamadmi - well, in Java I guess it should. In pseudo-code, contains should work just fine :)
– r0u1i
Apr 23 '14 at 13:22
4
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No Exception while type casting with a null in java
... equal to "null"
I wondered where that is specified and looked it up the Java Specification:
The null reference can always be assigned or cast to any reference type (§5.2, §5.3, §5.5).
If the reference is null, it is converted to the string "null" (four ASCII characters n, u, l, l).
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java.lang.ClassNotFoundException: Didn't find class on path: dexpathlist
...s my solution:
Right click on your project and select Properties.
Select Java Build Path from the menu on the left.
Select the Order and Export tab.
From the list make sure the libraries or external jars you added to your project are checked.
Finally, clean your project & run.
You may also c...
Constructor overloading in Java - best practice
... the least to the most arguments in the constructor call. Is this standard Java style? Why?: In my opinion it would make sense to do it the opposite way that way you the first constructor definition you should see is the one that has all the details.
– Josie Thompson
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