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How do I convert a byte array to Base64 in Java?
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Java 8+
Encode or decode byte arrays:
byte[] encoded = Base64.getEncoder().encode("Hello".getBytes());
println(new String(encoded)); // Outputs "SGVsbG8="
byte[] decoded = Base64.getDecoder().decode(encoded);
println(new S...
How to limit setAccessible to only “legitimate” uses?
The more I learned about the power of java.lang.reflect.AccessibleObject.setAccessible , the more astonished I am at what it can do. This is adapted from my answer to the question ( Using reflection to change static final File.separatorChar for unit testing ).
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Keystore type: which one to use?
By looking at the file java.security of my JRE , I see that the keystore type to use by default is set to JKS . Here , there is a list of the keystore types that can be used.
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How can I determine whether a Java class is abstract by reflection
...vy startup. I can't find anything obviously like isAbstract() in the Class.java docs.
3 Answers
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“new” keyword in Scala
...w keyword when creating objects in Scala? Is it when we try to instantiate Java objects only?
3 Answers
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What does value & 0xff do in Java?
I have the following Java code:
4 Answers
4
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Create a custom event in Java
I want to do something like this in Java but I don't know the way:
4 Answers
4
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IntelliJ IDEA JDK configuration on Mac OS
...ble under IntelliJ IDEA File menu.
Direct JDK path after the recent Apple Java update is:
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
In IDEA you can configure the new JSDK in File | Project Structure, select SDKs on the left, then press [+] button, then specify the above JD...
Java8: Why is it forbidden to define a default method for a method from java.lang.Object
Default methods are a nice new tool in our Java toolbox. However, I tried to write an interface that defines a default version of the toString method. Java tells me that this is forbidden, since methods declared in java.lang.Object may not be default ed. Why is this the case?
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log4j logging hierarchy order
...are integer variables for proof docjar.com/html/api/org/apache/log4j/Level.java.html
– the.malkolm
Oct 13 '11 at 7:25
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