Running Piece Of Code Inside String Object Possible?
Nov 7, 2014i need to run a piece of code which is inside a string object..is it possible?if so how?
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Running Database Inside Java Application
Jul 1, 2014I have to store data I've pulled from the web i wanted to do this by storing it in a database but after looking at some tutorials i'm not sure if its possible as the databases don't seem to run with the application but instead run as an independent entity.if its possible to have a database in the java application so it runs when the application runs.
View Replies View RelatedGetting Error While Running Code From Head First Java In Eclipse
Jan 2, 2015I downloaded this code from Head First Java. But when I tried running it on Eclipse, it gives this error message.
import javax.sound.midi.*;
public class MiniMiniMusicApp { // this is the first one
public static void main(String[] args) {
MiniMiniMusicApp mini = new MiniMiniMusicApp();
mini.play();
[code]....
and this was the error message: Jan 02, 2015 8:10:36 PM java.util.prefs.WindowsPreferences <init>Could not open/create prefs root node Software Java SoftPrefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
Error Connecting To Unix And Running Script From Java Code
Jun 25, 2014I get the following error when trying to run code.
java.lang.NullPointerException
at conntecttoDB8.SSHCommandExecutor.main(SSHCommandEx ecutor.java:26)
package conntecttoDB8;
import java.io.InputStream;
import com.jcraft.jsch.Channel;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
[Code] ....
Adding Package Name To Source-code When Compiling / Running From Command Line?
Apr 29, 2015I am operating java from the command line (using Terminal on Mac OSX 10.9.5).The current directory within Terminal is called "orange" and the following sourcecode file is in the orange directory :
Test1.java
package orange;
public class Test1 {
public static void main(String[] args) {
System.out.println("Test1 works");
}
}
This complies to Test1.class (visible in the orange directory) but when I try to run it in Terminal (simply using "java Test1" from within the orange directory). I get the following error message (which I don't get if I simply comment out the line //package orange;)
Exception in thread "main" java.lang.NoClassDefFoundError: Test1 (wrong name: orange/Test1)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
[code]...
Object Created Inside Switch
Mar 2, 2014I have create as short example which contains two classes Cat and Dog followed by a switch statement in the main method.
Class Cat
public class Cat {
private String name;
//Setter
public void setName(String pName)
{name = pName;}
//Getter
public String getName()
{return name;}
// Constructor
public Cat(String catName)
{name = catName;}
[code]....
My Issue is that after creating the objects within the switch statement, is there a way to return the objects back to the main method once created within the switch ?
JSP :: How To Avoid Large Code Blocks Inside Scriptlets
Jul 22, 2014I've already seen large code blocks inside JSP's, in a way it is very hard to maintain the web application. Is there a way to avoid that?
View Replies View RelatedHow To Rotate Object And Give Colour Inside
Mar 13, 2014package id.ac.ub.ptiik.computergraphics;
import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.util.glu.GLU.*;
public class CG04_3DTransformation extends CGApplication {
protected boolean wireframe = true;
[Code] .....
Swing/AWT/SWT :: Code Prevent Cursor From Moving When Inside A Cell Of JTable
Jun 24, 2014Tried creating a simple sample but all works as expected.
The following code prevents the cursor from moving when inside a cell of a JTable.
public void keyPressed(KeyEvent e) {
if ( (e.getKeyCode() == KeyEvent.VK_KP_LEFT) || (e.getKeyCode() == KeyEvent.VK_KP_RIGHT)
|| (e.getKeyCode() == KeyEvent.VK_RIGHT) || (e.getKeyCode() == KeyEvent.VK_LEFT) )
{
//Do nothing
e.consume();
}
}
});
When editing a cell, the existing code would use the right/left cursor keys to move from cell to cell as opposed to from character to character when editing a cell. I planned to override the functionality by tossing in the above code as a test to see if it stops the functionality before I override it.
After placing in the above code, the above functionality no longer occurs, but now the cursor moves within the cell as I wanted which is to move from character to character instead of cell to cell. Its great it works, but it really shouldn't. Essentially the default behavior has been restored when it should have really disabled the left/right keys.
I assume there is some underlying class someplace that is doing something to affect the behavior. Since a sample can't be provided I am wondering in what scenarios would the e.consume() restore default functionality?
Created New Project At Eclipse With Code Pasted Inside DomApli Container In Java File
Aug 11, 2014I created a new project at eclipse with this code pasted inside a domApli container in a java file, I tried to run it but it wont work,
package domApli;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Prg2 extends JFrame implements ActionListener{
JLabel lblNom;
JLabel lblEdad;
JTextField txtNom;
[code]...
Print Fruits With Their Price Per Piece And Quantity
Jun 27, 2014Create a program that will print the fruits with their price per piece and quantity (Use decimal format: ##.00)
Apple
Grapes
Orange
will also allow user to buy a fruit. If user bought fruit the quantity will be lessen and the total price will be displayed.
Make Piece Of Software That Enables To Press A Key On Keyboard
Aug 16, 2014i want to make a piece of software that enables me to Press a key on my keyboard and then it will play a Sound. But i Want to be able to do it when i'm playing.Can code The Sound an Keys
View Replies View RelatedDeveloping Tetris Based Characters - Can't Print The Piece Within Board
Dec 18, 2014I post the code I'm developing for a tetris-based characters. The problem I have is that I can't print the piece within the board. I haven't any error.
Class Piezas
Java Code:
public class Piezas {
public Piezas() {}
//atributos
private int i;
private int j;
private char m[][];
private int formaPieza;
[Code] ....
Declare String Inside Of Loop - Use It Outside
Apr 26, 2015I'm trying to code a little text RPG. I've made a little "personality test", with 4 questions (answers a b c), where every letter stands for a type of personality. The analysis of the result is simple counting of the answers, if you have 3 answers a (4 questions), then a has won. If 2 on a, and 2 on b, a simple Random method shows weather result a or b.
Now... the test should give you a "partner" (imagine the pokemon game with 3 different starter pokemon). I have now 3 string variables, like 3 different partners. They are all declared somewhere outside, but i only need one later.
Like...the test is completed, you have your partner and how can i make now that the program is just showing me my partner? Like...when i type " System.out.println(partner); " (outside of the test loop! ) that i only get the one i got through the test?
I was trying to declare in every loop the partner String with every result. But outside the loop java isn't recognising that String, bcs...ofc...it was declared for the loop. So i had in every if or else if clause a " String partner = anwsA;" and answB and answC, thats why i cant declare them outside.
Short: i need a partner String variable that could have 3 possible results... i jut need one
I'm using Eclipse Luna 4.4
Code Not Running Scanner NextLine After Using Scanner NextInt?
Feb 14, 2015package jdbc;
import java.sql.*;
import javax.sql.*;
import java.util.*;
public class Jdbc {
public static void main(String[] args) {
[code]....
Swing/AWT/SWT :: Draw String Inside A Shape
Mar 19, 2015I have this piece of code, i want to insert a text inside my shape.
import javax.swing.SwingUtilities;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.BorderFactory;
import java.awt.Color;
[Code] ....
Error While Running In Command Prompt Only - In Eclipse Running Fine
May 19, 2014This is my program: RemoteXMLRead.java
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.apache.commons.io.filefilter.WildcardFileFilte r;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;
import java.io.File;
[code]....
It is working fine when i run in Eclipse, but is giving error when i run in cmd.. What i need to do to over come this..
Object Contains Manipulation Code?
Mar 9, 2014 "Object contains data and code to manipulate that data."
Is the statement right ?? as far as i know object only contains copy of instance variables.
Code To Move Object In Grid
Aug 22, 2014Working with some code that displays the random movement of an object such as Move 1: (0,1) Move 2: (10,99)?
I need these methods in the class
void initialize( int xPos, int yPos)
void moveLeft()
void moveRight()
void moveUp()
void moveDown()
int getXPosition()
int getYPosition()
How To Create Object For Multiple Class Inside Single Class
Apr 22, 2015How to create object for "class B" and call the "function_B" from other different class D where class D has no connection with class A? Here is my program.
public class A(){
void print(){}
}
class B{
void function_B(){}
}
class C{
void function_C(){}
}
Here, A, B, C are in the same package. But class D is in different package.
Moving Object In A Frame - Code Not Working
May 7, 2014I have made a code that should allowed me to move an object in a frame, using the arrow keys. But I don't know why, is not working.
package joc;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.ImageIcon;
[Code] ....
Java Code Can Get At The Address Of Some Object Or Other Datum
Mar 17, 2015I wanted to ask is there any way that Java code can get at the address of some object or other datum? I've found this useful a few time with certain high performance C# libraries that I've developed.
Also does Java have the equivalent of C#'s "fixed" buffers? which are inline contiguous arrays of primitives (like Chars or Ints etc).
Code Not Printing String Literal
Sep 18, 2014I need to use print not println to declare stuff and I need to have string literals I think that's /n. Now when I compile it just shows row1, row2 ect. Why does it work like that?
public class art {
public static void main(String[] args) {
//local variables
String row1= "***********************";
String row2= "** *** *** **";
String row3= "** ***** ***** **";
[Code] ...
How Code Is Getting All Permutations Of A String With Recursion
Aug 7, 2014how the code is getting all the permutations of a string with recursion. The following code works correctly but I am having trouble grasping what it is doing.
public class Main {
private static void permutation(String prefix, String str){
int n = str.length();
if (n == 0)
System.out.println(prefix);
else {
for (int i = 0; i < n; i++)
permutation(prefix + str.charAt(i),
str.substring(0, i) + str.substring(i+1));
}
}
public static void main(String[] args) {
permutation("", "ABCD");
}
}
I see that each character is being appended to prefix through each iteration. So I know it adds "A" then "B" etc etc. I can follow it up until the "D" is appended to the prefix string. After that I don't understand how the D moves back to the str string and then the C moves back to str followed by the D moving back to the prefix string. I have stepped through the code many times in my debugger but still don't see how it moves back to str and knows to send D to prefix and not to send C. I feel I don't understand how recursion behaves therefore I can't follow.
Getting Object Value Out Of String?
Jun 13, 2014I am trying to get a price of a certain show in a theatre but the problem is that i don't know how to use the method's String parameter:
/**
* Gives the price of the show with a given place in the room
*
* @param place the place in the room (VIP, average seating, in the back)
* @return price
*/
public double getPlaceprice(String place) {
if (place !=null) {
double p = place.getPrice();
// price= Double.parseDouble("place.getPrice()");
return p;
}
return 0;
}
Now I have a class called Place which has an attribute double price and a getter for price
public double getPrice() {
return price;
So I somehow have to alter the String parameter Place to the object(class) Place, on which i can call the method getPrice()
At least, that's what i think i have to do. Where i go wrong?
Convert A String Of ASCII Code To Char?
Aug 25, 2014I am trying to figure out how to convert a string of ASCII code into char.I know that you can use (char) to convert it, but the issue is you cannot really just it for Strings.
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