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com.jcraft.jsch.JSchException: UnknownHostKey
I'm trying to use Jsch to establish an SSH connection in Java. My code produces the following exception:
12 Answers
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Finding the Eclipse Version Number
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eclipse.buildId=4.4.1.M20140925-0400
Again easier to find, as those are Java properties set and found with System.getProperty("eclipse.buildId").
Original answer (April 2009)
For Eclipse Helios 3.6, you can deduce the Eclipse Platform version directly from the About screen:
It is a combinatio...
Sending files using POST with HttpURLConnection
...ith some parameter using MultipartUtility in simple way.
MultipartUtility.java
public class MultipartUtility {
private final String boundary;
private static final String LINE_FEED = "\r\n";
private HttpURLConnection httpConn;
private String charset;
private OutputStream output...
@Basic(optional = false) vs @Column(nullable = false) in JPA
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@Xie Jilei: From book: Java persistence with hibernate 2007, p. 179: @Basic(optional = false) @Column(nullable = false) The @Basic annotation marks the property as not optional on the Java object level. The second setting, nullable = false on the...
Difference between abstract class and interface in Python
...se Python doesn't have (and doesn't need) a formal Interface contract, the Java-style distinction between abstraction and interface doesn't exist. If someone goes through the effort to define a formal interface, it will also be an abstract class. The only differences would be in the stated intent ...
Should I return a Collection or a Stream?
..., where the data arrives with random latency. For that, I would suggest RxJava.
– Brian Goetz
Jul 10 '14 at 18:38
4
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Getting the difference between two sets
...a nice feature to have the set operations like union , difference built in java. The above solution will modify the set , in many situations we don't really want that.
– Praveen Kumar
Jul 18 '14 at 8:09
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What is the difference between a URI, a URL and a URN?
...RLs are URIs". It depends on the interpretation of the RFC. For example in Java the URI parser does not like [ or ] and that's because the spec says "should not" and not "shall not".
So that muddies the waters further, unfortunately.
If you haven't already read Roger Pate's answer, I'd advise doi...
How to convert CharSequence to String?
How can I convert a Java CharSequence to a String ?
3 Answers
3
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Maximum length for MD5 input/output
...ong as the used datatype in the programming language used can be. Example: Java's strings use an array internally, therefore, a string can only contain (2^31)-1 characters (or less, depending on the heap size).That would also be your maximum input for the MD5 function in Java. But pure theoretically...