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Convert InputStream to byte array in Java
...’s a simple solution without the need for a 3rd party library, thanks to Java 9:
InputStream is;
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byte[] array = is.readAllBytes();
Note also the convenience methods readNBytes(byte[] b, int off, int len) and transferTo(OutputStream) addressing recurring needs.
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Does Python have “private” variables in classes?
I'm coming from the Java world and reading Bruce Eckels' Python 3 Patterns, Recipes and Idioms .
12 Answers
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How to check if a specified key exists in a given S3 bucket using Java
I would like to check if a key exists in a given bucket using Java. I looked at the API but there aren't any methods that are useful. I tried to use getObject but it threw an exception.
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Good Java graph algorithm library? [closed]
Has anyone had good experiences with any Java libraries for Graph algorithms. I've tried JGraph and found it ok, and there are a lot of different ones in google. Are there any that people are actually using successfully in production code or would recommend?
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What is the difference between public, protected, package-private and private in Java?
In Java, are there clear rules on when to use each of access modifiers, namely the default (package private), public , protected and private , while making class and interface and dealing with inheritance?
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How does interfaces with construct signatures work?
...mented by any class(at first glance this might look weird for guys with C#/Java background like me but give it a chance). It is slightly different.
For a moment think of it as a interface with a call signature(like a @FunctionalInterface in Java world). Its purpose is to describe a function type..k...
Java8 Lambdas vs Anonymous classes
Since Java8 has been recently released and its brand new lambda expressions looks to be really cool, I was wondering if this means the demise of the Anonymous classes that we were so used to.
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instanceof Vs getClass( )
...instanceof String using reflection is String.getClass().isInstance(o). The javadoc even says so: This method is the dynamic equivalent of the Java language instanceof operator.
– Andreas
Jun 10 '18 at 21:04
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How do you input commandline argument in IntelliJ IDEA?
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What if I wanna use a redirect symbol? For example, $ javac Filter WhiteList.txt < TotalList.txt, how can I run this in Intellij just like command lines?
– Wulfric Lee
Sep 9 '16 at 1:26
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How do I read all classes from a Java package in the classpath?
I need to read classes contained in a Java package. Those classes are in classpath. I need to do this task from a Java program directly. Do you know a simple way to do?
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