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How do I create a unique ID in Java? [duplicate]
I'm looking for the best way to create a unique ID as a String in Java.
11 Answers
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String, StringBuffer, and StringBuilder
...ing in all cases or there are some specific cases?
– JavaDragon
Jun 17 '16 at 7:57
@bakkal Can I use all the methods o...
Is Java Regex Thread Safe?
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Yes, from the Java API documentation for the Pattern class
Instances of this (Pattern) class are immutable and are safe for use by multiple concurrent threads. Instances of the Matcher class are not safe for such use.
If you are lookin...
Java: How to Indent XML Generated by Transformer
I'm using Java's built in XML transformer to take a DOM document and print out the resulting XML. The problem is that it isn't indenting the text at all despite having set the parameter "indent" explicitly.
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Loading a properties file from Java package
...tive to the directory which represents the package the class is in.
Using java.lang.String.class.getResource("foo.txt") would search for the (inexistent) file /java/lang/String/foo.txt on the classpath.
Using an absolute path (one that starts with '/') means that the current package is ignored.
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“Instantiating” a List in Java? [duplicate]
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In Java, List is an interface. That is, it cannot be instantiated directly.
Instead you can use ArrayList which is an implementation of that interface that uses an array as its backing store (hence the name).
Since ArrayList i...
What is the best open-source java charting library? (other than jfreechart) [closed]
Why are there not more opensource easy to use charting libraries for Java?. The only successful opensource project in this area seems to be jfreechart, and it doesn't even have any documentation or examples available.
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How do I do a HTTP GET in Java? [duplicate]
How do I do a HTTP GET in Java?
4 Answers
4
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Java LinkedHashMap get first or last entry
...ent = iterator.next() }
edit: However, if you're willing to go beyond the JavaSE API, Apache Commons Collections has its own LinkedMap implementation, which has methods like firstKey and lastKey, which do what you're looking for. The interface is considerably richer.
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Encode String to UTF-8
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String objects in Java use the UTF-16 encoding that can't be modified.
The only thing that can have a different encoding is a byte[]. So if you need UTF-8 data, then you need a byte[]. If you have a String that contains unexpected data, then ...