So I've been working on a music player in android studio and I've created two java classes. One for Main Start Screen(StartScreen.Java) and one for the main player (player.Java). I have an onClicl event associated with a button as shown below.
public void onclick(View view) { Intent detailIntent = new Intent(this, main_player.class); startActivity(detailIntent); }
The code for the second Java Class is as below. There is nothing in the java class as for now.
package com.example.musicplayer.app; import android.app.Activity; import android.os.Bundle; public class main_player extends Activity { protected void onCreate(Bundle savedInstanceState) {
[Code] .....
Where is the actual mistake because the app works fine until i click the button that is suppose to take me to the main player screen?
I lately started using "advanced" Swing-Components, like JTabbedPane and JComboBox, but I dont get the ComboBox working/This is the code I use:
public class PreferencesPanel extends JPanel { public PreferencesPanel (MapEditWindow window) { super ();
setLayout (new FlowLayout ());
String[] resolutions = { "1024x768", "1280x800"
[code]...
The TabbedPane is placed in another JPanel, which is placed in an Fullscreen-Window.
Now, the problem is, that when I start the application and open the "Preferences"-Tab, everything seems normal, I can see the ComboBox and the first entry is selected. But when I click it, instead of opening and offering me more choices, the program crashes and my screen turns black (I'm using OS X, on Windows it would possibly turn white, but I didnt test this out).
I do now have the problem where i have to insert the numbers 1 to 100 individually in order to allow the program to accept a grade as high as 100%.
Also as soon as i type in a negative number the system crashes and shows me a error as attached.
/* Averaging grades To use the Java Swing interface to calculate the average of up to 50 grades.Average is calculated once -1 is entered as a value. The grades are then sorted from lowest to highest and displayed in a content pane which also displays the average. */
import java.awt.*; import java.awt.event.*; import javax.swing .*; import javax.swing.text.*; public class Averages extends JFrame { //construct components JLabel sortPrompt = new JLabel("Sort By:");
My perfect idea is to have a Hashmap that would increase size each Key & value added, it's almost like a self-increasing array. I mean I could just create a very large Hashmap for me to add objects to anytime I want with a key to be able to find the object. Is this the most efficient way, because I'm trying to make my Object Library compatible with any amount of Objects, however, I know there's a limit to how many values you can have in an array, but it's larger than I'll ever need.
Let's say I'm making a number storage program, and I may need from 3 to 8 numbers to be stored with a key to find them easily using a Hashmap, rarely I may need below 3 or above 8. So is it efficient for me to create a Hashmap that has 10 placeholders? Or can I make this more efficient. Note, my Library is static.
I have written a library in one project but cannot seem import to import it into my main project whenever I try Maven says it cant find it though it is installed in the repository and the .jar file is in the classpath.
Stack trace org.jclarion.clarion.lang.ClarionCompileError: Class Not Found:com.MyProj.app.MyClass near line:310 (selma012.clw) at org.jclarion.clarion.lang.Lexer.error(Lexer.java:190) at org.jclarion.clarion.compile.grammar.AbstractParser.error(AbstractParser.java:111) at org.jclarion.clarion.compile.grammar.AbstractParser.importJava(AbstractParser.java:463) at org.jclarion.clarion.compile.grammar.AbstractParser.emptyLex(AbstractParser.java:258)
I want to download objects (css , jpeg, html ,png ) using sockets in java without using httpurlconnection . How can i do this with simple socket library ?
I'm just a java beginner. I've spent a lot of time installing and configuring software. I'm using Netbeans 7.3 on Windows 7, 64 bit. Recently, I downloaded opencsv from sourceforge.
With no previous experience adding libraries, I read a blog post on adding the library. I think that I then:
Start a new project.
Right click on libraries
Add jar/folder
Gave the temporary path to the .jar file
After, I read the blog post again, and realized I'd missed it. This time I did:
Right click library, Add library, Create library
However, I kept getting a message that the same library already existed. If I do the first process above, I will find the same library.
However, I see no way in Netbeans to remove it. I've deleted the test projects. And started a new one. But the library now exists for all projects it seems.
I've grepped all the files under the Netbean directory, searching for "opencsv", but found nothing. The only things in the Windows registry were locations of files.
How can I delete this library permanently from Netbeans? Short of, uninstall, then reinstall? Is there a way to list all the libraries that Netbeans has?
So I'd like to make like a library of tiles, and it isn't too big, which I could just call using a method, and I would specificy what information I need to get, and it would return that information.
For example, a small section of the tiles library is grass_tile, I call this library and specify what I need, and in this case let's say I need the width, or can the character enter it from north? or can the character just stand on it? So it's like a library or array, with sections of it being named by tiles, and by mentioning these tiles I can information about them.
gTile("grass","walkon") will return true, first because I specifiy grass, and yes the character can walk on grass, so it returns a boolean value of true.
gTile("stone","width") will return 16, first because I specify stone, and the stone's png image size is 16.
What I'm asking is not for how to work out if the character can walk on the tile, or read the width of a tile, but can I create like a library from which I can obtain information by giving the name of the tile, and then telling it what info I need.
If up key pressed && gTile((yTILE + 1).name(),"walkon") == true then moveChar("up")
i have been given a homework assignment where I have to get rid of a stack object I wrote for a program and replace it with the Stack<E> library java offers ie:
public class Stack<E> extends Vector<E> { public Stack(); // constructor public Boolean empty(); public E peek(); public E pop(); public E push(E item); }
my question is do i have to actually write all these methods? Or can i just construct a stack and use the methods?
On the first run, everything loads perfectly. The second run, I get the "Could not locate OpenAL library." error. I have the most updated version of slick/lwjgl. I have no clue why this is happening.I should also say, this error only happens if I get a message in the console saying "1 device not closed.." message for OpenAL. Here's the error message:
Quote Mon Oct 20 16:39:35 EDT 2014 INFO:Initialising sounds.. AL lib: (EE) MMDevApiOpenPlayback: Device init failed: 0x80004005 AL lib: (EE) MMDevApiOpenPlayback: Device init failed: 0x80004005 Mon Oct 20 16:39:35 EDT 2014 ERROR:Sound initialisation failure. Mon Oct 20 16:39:35 EDT 2014 ERROR:Could not locate OpenAL library. org.lwjgl.LWJGLException: Could not locate OpenAL library. at org.lwjgl.openal.AL.create(AL.java:151) at org.lwjgl.openal.AL.create(AL.java:102)
I want to follow this tutorial on YouTube but I cant seem to find the JRE System Library on NetBeans? So I decided to just get Eclipse but when I unzip the download and click either .exe files(I only see two .exe files) it gives me this message:
"The Eclipse executable launcher was unable to locate it's companion shared library."
Which ultimately prevents me from using the software completely.
I have html code that use form and the result displayed with display tag library the form forward to servlet page but when I use a javascript to change value of hidden after returning to html page the value of hidden input deos not change
I need to make a relation (OneToMany) between a entity on my server and a entity in my library (ManyToOne).
My program consists of 3 main components:
- a client (who uses session beans to query the server) - a server (which contains entity's) - a lib which is shared between the client and the server. (which also contains entity's)
Here is the thing I want to do:
Class on my Server:
@Entity public class ClassOnServer implements Serializable{ @Id private int uid; @OneToMany(cascade=ALL, mappedBy="relation") private Set<ClassOnServer> relation1; //This is no problem, because the server can import the library }
Class on my Library:
@Entity public class ClassInLibrary implements Serializable{ @Id private int uid; @ManyToOne private ClassOnServer relation2; //This gives an error because ClassOnServer can not be imported into the library }
It's not an option to move ClassOnServer to my lib because this would ruin the whole architecture.
I am using Spring to develop a web application.I have used JQuery ui in HTML page it is working fine a Dialog box appear with JQuery effect.But When I use the same procedure in jsp it is not working.Here is my code of jsp file
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Login Page</title> <style>
I am trying to write the id3 tags using mp3agic library. The problem is it does not update the id3 tags for the mp3 files which already contains id3 tags but it only updates the file that have id3 tags which are empty.
When i look at the newly created files, they contains the older tags. Then i wrote a script to access id3 tags through mp3agic
id3v1Tag.getArtist()
then it was showing updated tags.
Why it is showing updated tags even if they are not really updated in folder where i visits ?