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Is there more to an interface than having the correct methods
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There is nothing in this answer that is exclusive to Java interfaces. The same applies equaly well to abstract classes, or even concrete ones. I would expect a good answer to mention the ability to implement multiple interfaces, and when/why that would be useful.
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In Java 8 how do I transform a Map to another Map using a lambda?
I've just started looking at Java 8 and to try out lambdas I thought I'd try to rewrite a very simple thing I wrote recently. I need to turn a Map of String to Column into another Map of String to Column where the Column in the new Map is a defensive copy of the Column in the first Map. Column has...
max value of integer
...(for 32 bit machine) is 32 bits, and it ranges from -32,768 to +32,767.
In Java, the integer(long) is also 32 bits, but ranges from -2,147,483,648 to +2,147,483,647.
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Maven in Eclipse: step by step installation [closed]
...ads/eclipse-packages/ have M2Eclipse included already. As of Neon both the Java and the Java EE packages do - look for "Maven support")
Way 1: Maven Eclipse plugin installation step by step:
Open Eclipse IDE
Click Help -> Install New Software...
Click Add button at top right corner
At pop up: ...
Spring MVC type conversion : PropertyEditor or Converter?
... have to write 2 converter classes + add several lines of in xml config or java config. I am talking about Spring MVC form submitting/displaying, with general conversions (not only entities).
– Jerome Dalbert
Sep 23 '12 at 12:22
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How to step back in Eclipse debugger?
...ate: Chronon provides a commercial product that it describes as a "DVR for Java", which appears to do a lot of the same things as the ODB.
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Import package.* vs import package.SpecificType [duplicate]
...rhead to write an import loading all the types within one package ( import java.* ); than just a specific type (i.e. import java.lang.ClassLoader )? Would the second one be a more advisable way to use than the other one?
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Is not an enclosing class Java
...lly helpful, I never knew you could call new twice in a row (and I've done java for 8+ years!)
– PaulBGD
Sep 13 '15 at 0:58
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Building big, immutable objects without using constructors having long parameter lists
...rspacing(12)
.build();
I wrote "CORRECTLY DONE" in bold because most Java programmers get fluent interfaces wrong and pollute their object with the method necessary to build the object, which is of course completely wrong.
The trick is that only the build() method actually creates a Foo (henc...
Why is the clone() method protected in java.lang.Object?
What is the specific reason that clone() is defined as protected in java.lang.Object ?
11 Answers
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