Tags down


Generic Java 5 method that can take either a Class or a Collection?

By : Dima Chammas
Date : October 18 2020, 11:12 AM
this will help Refactor the 2 methods to a single private method taking an Object argument or whatever global type it is actually expecting and let the both public methods call it. E.g.
code :

Share : facebook icon twitter icon

Generic collection as a Java method argument

By : micola
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Make a generic method
code :
public static <T> void change( List<T> list, int position1, int position2) {
    T obj = list.get(position1);
    list.set(position1, list.get(position2));
    list.set(position2, obj);

Tricky Java Generics : generic class implementing non generic interface with generic Method

By : Galal Elshery
Date : March 29 2020, 07:55 AM
I hope this helps you . I have the following code as seen in ideone.com:
code :
class MyVisitor<T> implements Visitor{
    List<T> list = new  ArrayList<T>();

    public <T> void visit(T value){
class MyVisitor<T> implements Visitor{
    List<T> list = new  ArrayList<T>();

    public <V> void visit(V value){
interface Visitor<V>{
    public void visit(V Value);
interface Visitor{
    public void visit(Object Value);

Set not applicable for Collection in generic method with Java

By : Ivan Lasamahu
Date : March 29 2020, 07:55 AM
wish helps you Just as a List is not a List, a Map> is not a Map> and it's not a Map>.
The solution here is to add a wildcard in place of Set to allow a subclass in the generic type parameter.
code :
//                                                   Add v
public static <V> List<V> sortedValuesFromMap(Map<?, ? extends Collection<V>> keysValues,
    Comparator<V> comp) {

Java generic method to find 'max' object from collection using compareTo method problem

By : Encoded
Date : March 29 2020, 07:55 AM
will be helpful for those in need List means "a List. We don't know a List of what, but whatever it is, we do know that it extends T or is T itself."
One effect of this is that when we take an element from the List, the compiler will know it as of type T. The actual runtime class of the item may be a subtype of T, as is always the case with polymorphism, but no one cares about that. We know it can be stored in a variable type T.

How do you get an instance of java.lang.Class for a generic collection like Collection<SomeObject>?

By : Paula Melo
Date : October 18 2020, 11:12 PM
hop of those help? You can't. Type erasure means that you can't do this this way.
What you can do is:
Related Posts Related Posts :
  • GWT DatePicker Locale
  • How would you design a twitter like message system, how to design the messaging system?
  • Is there a robust java.util.logging handler implementation of syslog?
  • Aligning messageformat on printing a JTable
  • SXXP0003: Error reported by XML parser: Content is not allowed in prolog
  • ehcache LRU evicting recently used entries
  • java cosine similarity problem
  • Efficient way to implement a client multiple file upload service
  • Regarding Object Comparison
  • How to embed IE in Swing application?
  • Using javax.tools.ToolProvider from a custom classloader?
  • What is the difference between i++ & ++i in a for loop?
  • Match a java main class with regexp
  • Confluence Persistence
  • Is there a way for a SecurityManager in java to selectively grant ReflectPermission("suppressAccessChecks")?
  • Using the camera activity in Android
  • Is communication in java rmi secure?
  • Java - how to make "runnable" JTable?
  • How can I write a Java program to draw a box, an oval, and an arrow?
  • What is the difference between ServletRequest's getRemoteHost() and getServerName()
  • java sparse matrix problem
  • ClassCastException when using HQL
  • how to generate a csv file through java code
  • Netbeans + tomcat on Ubuntu
  • How to connect to a remote MySQL database with Java?
  • System Event Handling using Java
  • How to change Ant script with EMMA code-coverage so it can find runtime coverage data?
  • Java bytecode iconst_0 iadd sequence
  • get the size of a list in a property
  • I want to convert a resultset to a string. I have tried everything but it always gives no data found. Please provide som
  • How can i sort java JTable with an empty Row and force the Empty row always be last?
  • How can I mount network drive in Mac OS X on Java?
  • XStream: How do I map xml mixed attributes and elements to POJOs?
  • begin with java voip
  • java: Preferences API vs. Apache Commons Configuration
  • Howto distinguish Application Quit from System Shutdown
  • How to go about with real GUI development with Java Swing and MVC
  • VB support in Java 6?
  • How to use jar files without package information?
  • how to inherit Constructor from super class to sub class
  • Multidimensional arrays in Java extends which class?
  • Connect to ibm mq with jms . Specify the channel and queue manager
  • Accessing the implicit objects from a JSP EL function
  • Find current heap size with jmap
  • Why doesn't Java have compound assignment versions of the conditional-and and conditional-or operators? (&&=, ||
  • What is the best way to manage configuration data
  • commons fileUpload: specifying an upload directory within Webapplication context
  • ModelAttributes not accessible on jsp
  • Session management between thick client and server?
  • Oracle JDBC intermittent Connection Issue
  • No mapping for LONGVARCHAR in Hibernate 3.2
  • A Packet Blocker Software
  • Anyone using Django in the "Enterprise"
  • Memory leak during repeated lucene query searches?
  • First steps developing in java applet. Directions
  • java efficient de-duplication
  • Converting sequential Java to concurrent java code
  • Java variable number or arguments for a method
  • when developing locally, does it make a difference if the context is '/' or '/appname/'?
  • Problem using JUnit4TestAdapter from eclipse plugin context
  • shadow
    Privacy Policy - Terms - Contact Us © bighow.org