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Convert file: Uri to File in Android
...ore. This should work:
new File(new URI(androidURI.toString()));
URI is java.net.URI.
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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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How do I format a long integer as a string without separator in Java?
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It's not undocumented. See download.oracle.com/javase/6/docs/api/java/lang/….
– Rob H
Aug 28 '10 at 0:53
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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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Java 8 functional interface with no arguments and no return value
What is the Java 8 functional interface for a method that takes nothing and returns nothing?
3 Answers
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Java Reflection Performance
...oking up a class via reflection is, by magnitude, more expensive.
Quoting Java's documentation on reflection:
Because reflection involves types that are dynamically resolved, certain Java virtual machine optimizations can not be performed. Consequently, reflective operations have slower perform...
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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Is there a difference between single and double quotes in Java?
Is there a difference between single and double quotes in Java?
4 Answers
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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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