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How to convert jsonString to JSONObject in Java
...fore choosing. See this benchmark I did using JMH: github.com/fabienrenaud/java-json-benchmark It clearly shows jackson faster than anything else and 5 to 6 times faster than org.json.
– fabien
Jun 27 '16 at 20:47
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Hash String via SHA-256 in Java
... other freely available utility) to generate a SHA-256 Hash of a String in Java. Looking at their documentation I can't seem to find any good examples of what I want to do. Can anybody here help me out?
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Developing for Android in Eclipse: R.java not regenerating
I've found out that my R.java is never updated, so it doesn't contain information about my new resources, so I decided to delete it and thought that Eclipse would generate a new one. But that didn't happen, and I don't have R.java now. How can I regenerate one?
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What are the key differences between Scala and Groovy? [closed]
...languages for the JVM that have lambdas and closures and interoperate with Java. Other than that, they're extremely different.
Groovy is a "dynamic" language in not only the sense that it is dynamically typed but that it supports dynamic meta-programming.
Scala is a "static" language in that it i...
Can overridden methods differ in return type?
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Java supports* covariant return types for overridden methods. This means an overridden method may have a more specific return type. That is, as long as the new return type is assignable to the return type of the method you ar...
A KeyValuePair in Java [duplicate]
I'm looking for a KeyValuePair class in Java.
Since java.util heavily uses interfaces there is no concrete implementation provided, only the Map.Entry interface.
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Get integer value of the current year in Java
I need to determine the current year in Java as an integer. I could just use java.util.Date() , but it is deprecated.
15 A...
Change date format in a Java string
..."));
System.out.println(newstring); // 2011-01-18
Or, when you're not on Java 8 yet, use SimpleDateFormat#parse() to parse a String in a certain pattern into a Date.
String oldstring = "2011-01-18 00:00:00.0";
Date date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S").parse(oldstring);
Use Simpl...
Build Eclipse Java Project from Command Line
Is there a way to compile an Eclipse-based Java project from the command line?
8 Answers
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Java current machine name and logged in user?
...("user.name"); //platform independent
and the hostname of the machine:
java.net.InetAddress localMachine = java.net.InetAddress.getLocalHost();
System.out.println("Hostname of local machine: " + localMachine.getHostName());
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