default-method Questions
1
Solved
I have a custom interface I've been using for some time that looks something like this:
public interface Function<T, R> {
R call(T input);
}
I'd like to retrofit this interface with both ...
Dimarco asked 4/6, 2015 at 3:39
1
Solved
I'm coding in IntelliJ IDEA. When debugging my application, I can't use some default method implementations in Watches.
Here is a condensed example:
public class Friendship {
interface Friend {
...
Splash asked 4/5, 2015 at 17:44
1
Solved
Suppose there are two interfaces Interface1 and Interface2 where Interface2 extends Interface1.
interface Interface1 {
default void method() {
System.out.println("1");
}
// Other methods
}
...
Differentiate asked 8/4, 2015 at 21:49
2
Solved
What was the design consideration of not allowing use-site injection of extension methods to java 8?
We have default methods that were also referred to as defender methods and 'virtual extension methods'.
While I appreciate the tremendous value of default methods (that in some aspects are even mor...
Badtempered asked 6/4, 2015 at 6:27
3
I'm using JDiagram JAR like below
Diagram myDigram = new Diagram();
myDigram.routeAllLinks();
This code works fine when run with JRE 7 however when it is run with JRE 8, following error is bein...
Catgut asked 16/3, 2015 at 3:47
1
Solved
I'd like to use the @ServiceActivator annotation on a Java 8 default interface method. This default method will delegate to another method of this interface depending on business rules.
public int...
Polemic asked 16/3, 2015 at 11:52
1
Solved
Is it a safe practice to use default methods as a poor's man version of traits in Java 8?
Some claim it may make pandas sad if you use them just for the sake of it, because it's cool, but that's n...
Telegony asked 23/2, 2015 at 19:25
1
Solved
public interface Table<T> {
@Overrride
default boolean equals(Object other) {
//do something and return true/false
}
}
Why does the above code has compilation error of "java: def...
Overcome asked 19/1, 2015 at 6:46
2
Solved
If I have two interface with the same default method and both are implementing with a class/ See this program.
interface alpha {
default void reset() {
System.out.println("This is alpha version ...
Kab asked 25/12, 2014 at 16:37
1
Solved
Let's take an example:
public interface Testerface {
default public String example() {
return "Hello";
}
}
public class Tester implements Testerface {
@Override
public String example() {
...
Handcrafted asked 8/12, 2014 at 22:46
4
Solved
I think it can't, because marker interface principle is to not have any methods, but since default methods are not abstract I am not sure.
Widescreen asked 3/11, 2014 at 21:57
1
Solved
I feel a bit confused about the default methods implementations in interfaces introduced in Java 8. I was wondering if we should write JUnit tests specifically for an interface and its implem...
Ermina asked 16/9, 2014 at 9:49
2
Solved
While writing a crypto utility class I ran into a problem with the following method:
public static void destroy(Key key) throws DestroyFailedException {
if(Destroyable.class.isInstance(key)) {
(...
Sharell asked 20/7, 2014 at 13:0
4
Solved
I often want to map one list into another list. For example if I had a list of people, and I wanted a list of their names, I would like to do:
GOAL
List<Person> people = ... ;
List<Str...
Extensor asked 10/3, 2014 at 18:53
1
Solved
In java 8 I have something like this:
package test;
public class SimpleFuncInterfaceTest {
public static void carryOutWork(AFunctionalInterface sfi){
sfi.doWork();
}
public static void m...
Goth asked 17/6, 2014 at 21:34
1
Solved
Along the same lines as this question, I wonder why the Java team didn't add a few default methods to the Lock interface, something like this:
public default void withLock(Runnable r) {
lock();
...
Teniafuge asked 4/6, 2014 at 9:51
1
Solved
Visitor pattern (double dispatch) is a very useful pattern in its own rights, but it has often been scrutinized of breaking interfaces if any new member is added to the inheritance hierarchy, which...
Epiphenomenon asked 29/3, 2014 at 21:28
4
Solved
While searching through the Java Language Specification to answer this question, I learned that
Before a class is initialized, its direct superclass must be
initialized, but interfaces implemented...
Technetium asked 15/4, 2014 at 23:2
5
Solved
Java 8 interface default methods vs. non-abstract methods in abstract classes
- are there any differences between the two (besides the differences of iface - class, visibility etc.)
Isn't a defaul...
Foeman asked 22/11, 2013 at 7:30
3
Solved
I have an interface in which I want to provide a default method to Serialize the inherited classes. I use a JsonSerializer<T> class to do serialization.
The method looks like:
public interf...
Trochophore asked 2/4, 2014 at 5:26
3
Solved
I have a number of default methods in interfaces that need synchronization and it seems that only this is available:
default void addUniqueColumns(List<String> names) {
synchronized (this) ...
Crittenden asked 1/12, 2013 at 11:27
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