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Java 8 stream's .min() and .max(): why does this compile?
...ator!
The answer is in the way that the new lambda functionality works in Java 8. It relies on a concept which is informally known as "single abstract method" interfaces, or "SAM" interfaces. The idea is that any interface with one abstract method can be automatically implemented by any lambda - ...
How to print a float with 2 decimal places in Java?
...ike so:
System.out.printf("%.2f", val);
In short, the %.2f syntax tells Java to return your variable (val) with 2 decimal places (.2) in decimal representation of a floating-point number (f) from the start of the format specifier (%).
There are other conversion characters you can use besides f:
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What is the best way to implement constants in Java? [closed]
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The previous comment about import static only applies to Java 5+. Some feel the shorthand isn't worth the possible confusion as to where the constant came from, when reading long code, MaxSeconds.MAX_SECONDS may be easier to follow then going up and looking at the imports.
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“R cannot be resolved to a variable”? [duplicate]
...is the best way to solve this problem: [Android Development- Where is my R.Java file?][2]
R.java not regenerating
R cannot be resolved - Android error
R cannot be resolved to a variable
R cannot be resolved to a variable -- mailing list entry
Fixed: R cannot be resolved to a variable
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How to return multiple objects from a Java method?
I want to return two objects from a Java method and was wondering what could be a good way of doing so?
25 Answers
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UnmodifiableMap (Java Collections) vs ImmutableMap (Google) [duplicate]
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Now with Java 9, you can use: Map<String,String> unmodifiableMap = Map.ofEntries(entry("A","B"), entry("C","D"), entry("E","F")); which is more beautiful to my mind
– Steph
Sep 11 '18 at 13...
Create a Path from String in Java7
How can I create a java.nio.file.Path object from a String object in Java 7?
4 Answers
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Describe the architecture you use for Java web applications? [closed]
Let's share Java based web application architectures!
10 Answers
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Zipping streams using JDK8 with lambda (java.util.stream.Streams.zip)
In JDK 8 with lambda b93 there was a class java.util.stream.Streams.zip in b93 which could be used to zip streams (this is illustrated in the tutorial Exploring Java8 Lambdas. Part 1 by Dhananjay Nene ). This function :
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Encrypt Password in Configuration Files? [closed]
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A simple way of doing this is to use Password Based Encryption in Java. This allows you to encrypt and decrypt a text by using a password.
This basically means initializing a javax.crypto.Cipher with algorithm "AES/CBC/PKCS5Padding" and getting a key from javax.crypto.SecretKeyFactory with...