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Method has the same erasure as another method in type
...t allowed, drawn from the JLS. Suppose, before generics were introduced to Java, I wrote some code like this:
class CollectionConverter {
List toList(Collection c) {...}
}
You extend my class, like this:
class Overrider extends CollectionConverter{
List toList(Collection c) {...}
}
After t...
Why java classes do not inherit annotations from implemented interfaces?
...implementing class doesn't inherit the annotation as stated in Inherited's java doc:
2 Answers
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Different between parseInt() and valueOf() in java?
...ct when it says it returns a 'new' Integer. That's not what it says in the Javadoc. It is free to return a cached Integer.
– Marquis of Lorne
Jul 18 '15 at 11:06
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How does JavaFX compare to WPF? [closed]
I'm mostly a C# programmer, I stopped writing Java about 10 years ago, but I try to keep up with the technology in Java by reading articles, talking with friends, etc.
...
Java - escape string to prevent SQL injection
I'm trying to put some anti sql injection in place in java and am finding it very difficult to work with the the "replaceAll" string function. Ultimately I need a function that will convert any existing \ to \\ , any " to \" , any ' to \' , and any \n to \\n so that when the string is e...
Why do I need to override the equals and hashCode methods in Java?
...
Joshua Bloch says on Effective Java
You must override hashCode() in every class that overrides equals(). Failure to do so will result in a violation of the general contract for Object.hashCode(), which will prevent your class from functioning properly in ...
What is the easiest way to get the current day of the week in Android?
...
Use the Java Calendar class.
Calendar calendar = Calendar.getInstance();
int day = calendar.get(Calendar.DAY_OF_WEEK);
switch (day) {
case Calendar.SUNDAY:
// Current day is Sunday
break;
case Calendar.MOND...
Run a JAR file from the command line and specify classpath
...re)
Specify everything (including your jar) on the commandline using -cp:
java -cp MyJar.jar:lib/* com.somepackage.subpackage.Main
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Java Byte Array to String to Byte Array
...e! I think you've completely understood what I was after... I'm not from a Java background, so I couldn't really figure out the conversion I needed. Just for info, I'm sending s1 to the server, and the server is replying with s1 (I can verify that the server received and replied with the data in s1)...
Type List vs type ArrayList in Java [duplicate]
...rn types being changed as well (will cause a NoSuchMethodException between Java versions if the internal return type changes). An example of this is the change in the return type of keySet in ConcurrentHashMap between Java 7 and 8.
– Rogue
Mar 12 '15 at 23:11
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