I have just tried to learn java this week [COLOR="#000000"]and I am being held back by this once installed java jdk I nav to the java file and the bin file and then the javac file to find that the below tab does not exist
A new window should pop up giving the properties of the javac, there should be an attribute called Location..I can see the location option in my documents but in no other folder
I am new to javafx I start using it instead of swing i used the scene builder for my forms the problem i faced i don't know how to have main screen with menu bar at top and depending the select from the menu it will open other windows and those window must be inside my window just like for example netbeans.
I don't need to open new window in separate i need all windows inside my main window and controlling over them minimize maximize perhaps.
Java Code: esolve@mypad:~/temp$ java -version
java version "1.7.0_75"
OpenJDK Runtime Environment (IcedTea 2.5.4) (7u75-2.5.4-1~trusty1)
OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode)
esolve@mypad:~/temp$ javac HelloWorld.java
program 'javac' is in the following packages：
* default-jdk
* ecj
* gcj-4.8-jdk
* openjdk-7-jdk
* gcj-4.6-jdk
* openjdk-6-jdk
please try：sudo apt-get install <package> mh_sh_highlight_all('java');
I see there is jdk in my ubuntu system but when I run javac, it asks me to install a jdk.
The following two files are in the same directory.Eclipse is the IDE.fix the javac cannot find symbol buildUserInfos error.
package my.proj;
import my.proj.UserInfo;
public class ConvertUser {
//...
public static UserInfo[] buildUserInfos(WebUserInfo[] webUserInfos){
[code]...
In using javac, I have installed the JDK, set the PATH and JAVA_HOME. When I run this:
"C:Program FilesJavajdk1.8.0_40injavac" -cp C:Gj_javacHTMLCarbonResults.java
I get: javac: no source files
Since I placed the source file path in the command line, I don't understand why it can't find the one .java file.
error: cannot find symbol Place
I'm trying to use the javac -sourcepath option to compile superclasses without explicitly naming them. I've been looking at examples, other posts, and trying variations for a while without success.
I have:
package ActorBase0.classes;
public class Bridge extends Place {
......
Place is also in package ActorBase0.classes and the source files are in the same directory .... ActorBase0sources
javac -d ActorBase0classes -sourcepath ActorBase0sources -cp . -Xlint:unchecked -verbose ActorBase0sourcesBridge.java
is one of the variations that gets error: cannot find symbol Place.
So today i was trying to compile a simple script that used to work before on Sublime Text 2, an i got the following error;
javac: invalid flag:
Usage: javac <options> <source files>
use -help for a list of possible options
I already know the script works because i didn't change anything since the last time it work, but anyways just in case i tried running a HelloWorld program just to check it out and i got the same error. The i stop trying to compiling the HelloWorld on Sublime so I went to Terminal and i got the same exact error.
I am trying to extract a jar file from Matlab code using javac from Library Compiler (java package).
I have set JAVA_HOME to:
Java Code:
C:Program FilesJavajdk1.7.0_11 mh_sh_highlight_all('java');
and added to PATH:
Java Code:
C:Program FilesJavajdk1.7.0_11bin. mh_sh_highlight_all('java');
When I enter java -version in my console, I get java version jdk1.7.0_11 and running javac -version shows jdk1.7.0_11.
However, it seems that matlab could not find javac, thus, I am not able to compile my .m code into a .jar file. When I tried to compile .m code I got the following:
Java Code:
Error: An error occurred while shelling out to javac (error code = -1).
Unable to build executable.
Executing command: ""C:Program FilesJavajdk1.7.0_11binjavac" mh_sh_highlight_all('java');
This is the directory of my java bin folder and javac.exe exists : CProgram FilesJavajdk1.7.0_11binjavac.exe? What should I check in order to correctly link Matlab to Java?
compiling javac is nt recognized as internal or external command
View Replies View RelatedI've installed the Java JDK onto my Windows 8 laptop and the first thing I need to do is run the compiler from the Command Prompt. The first prompt I enter is C:java -version. This worked fine, however when I try to enter the next prompt C:javac -version, I am getting the following screen and messages:
Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.
C:UsersMary>java -version
java version "1.8.0_20"
Java(TM) SE Runtime Environment (build 1.8.0_20-b26)
Java HotSpot(TM) 64-Bit Server VM (build 25.20-b23, mixed mode)
C:UsersMary>javac -version
'javac' is not recognized as an internal or external command,
operable program or batch file.
I have entered the path into the environment variables area within my control panel. Not too sure why the first prompt works, but the second doesn't...
Out of eg. MyApp.java in the directory est I can create the MyApp.class by way of this order:
Java Code: javac C: estMyApp.java mh_sh_highlight_all('java');
It should be possible to let the javac create a subdirectory according to the file's package statement. So I have tried:
Java Code:
javac -d C: estMyApp.java mh_sh_highlight_all('java');
That always gives me the message that javac could not create the directory.
I am having trouble figuring out why java is giving me an error for the symbols. I will post the errors below the code.
Java Code: import java.util.Scanner;
public class ShelbyHarms_3_02 {
public static void main(String[] args) {
Scanner console = new Scanner(System.in);
[code]....
I am testing a code given by my lecturer and the output it gives me are all question marks? Heres the code:
package assignment;
import java.util.Random;
public class DeckOfCards { // begin DeckOfCards data type
// playing cards of deck of cards
private PlayingCard[] deck;
[code]....
I am having issues with the first part of my program. When I got to display what is in the textfile, it only gives me one name two times. I cannot figure out what to do with my outer loop in order for it to read and output the entire data file.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.util.Scanner;
import java.io.*;
import java.text.*;
import java.math.*;
import java.util.StringTokenizer;
[Code] ....
I am having some serious difficulty getting my project off the ground. I have the following code:
FileInputStream file = new FileInputStream(new File("src/retestchecker/test_sheet.xlsx"));
//Get the workbook instance for XLS file
XSSFWorkbook workbook = new XSSFWorkbook(file);
//Get first sheet from the workbook
XSSFSheet sheet = workbook.getSheetAt(0);
Row row = sheet.getRow(0);
Cell x = row.getCell(3);
System.out.println(x);
Everything is properly imported, etc etc.. But I am getting this error and I am not sure what it means:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/xmlbeans/XmlException
at retestchecker.RetestChecker.main(RetestChecker.java:23)
Caused by: java.lang.ClassNotFoundException: org.apache.xmlbeans.XmlException
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
[Code] .....
Java Result: 1
I am using Netbeans and the latest version of Apache POI that was released May 11, 2015.
The line 23 that the error refers to is this line:
XSSFWorkbook workbook = new XSSFWorkbook(file);
I have an app that is randomly hanging it doesn't give any error information when it hangs.
Is there at way to see what's going on when it hangs? e.g. the methods that are being called, where is the program execution at..
Create an array that will store 7 temperatures.
Populate the array with 7 random temperatures from 1 to 100 degrees. (hint use a for loop and a Random number Generator)After the temperatures are in the array, calculate the average of the temperatures in the array.
Print out the average.Print out each temperature in a statement comparing it to the average such as:
The average temperature is 48.94
Temperature 1 is 5.0 and is below average.
Temperature 2 is 67.8 and is above average.
import java.util.Random;
public class ArrayOfTemperatures
{
public static void main(String[] args) {
// Declare an array
int[] randomtemps = new int[7];
temps[0] = 45;
[code]....
I am having problems with writing a simple program to see if a number is divisible by 6.
public void run() {
println("This program will display all numbers divisible by");
println(" 6 between 1 and 100.");
int x =1;
boolean divide =(x%6==0);
[Code] ....
It is telling that every number is not divisable by 6?
why the output is not giving the proper result? Is this a semantic error?
public class Programming1Practice {
/* testing out instantiation and object oriented programming */
public static class staticValues {
[Code]....
Okay so I need to be able to read a file and then be able to find the longest sequence of increasing numbers.
So if the file was this, (this is Ass1Q2_test4.txt)
97 47 56 36 60 31 57 54 12 55
35 57 41 13 82 80 71 93 31 62
89 36 98 75 91 46 95 53 37 99
25 45 26 17 15 82 80 73 96 17
75 22 63 96 96 36 64 31 99 86
12 80 42 74 54 14 93 17 14 55
14 15 20 71 34 50 22 60 32 41
90 69 44 52 54 73 20 12 55 52
39 33 25 31 76 45 44 84 90 52
94 35 55 24 41 63 87 93 79 24
the output should be,
(5,0) with cost 12
(6,0) with cost 14
(6,1) with cost 15
(6,2) with cost 20
(7,2) with cost 44
(7,3) with cost 52
(7,4) with cost 54
(6,3) with cost 71
(5,3) with cost 74
(4,3) with cost 96
Greatest path is of length 10.
Now, the code that I have works, kind of. Instead of recurring several times at each point, it only recurs once.
So say I'm looking at (1,1). With (1,1) being 57. The area around it looks like this.
97 47 56
35 57 41
89 36 98
Now when I look at it, there are several paths it can take. It can go 57, 97 or 57, 89 or 57, 98. However, I'm pretty sure that it just uses the first one that corresponds with the first if statement that is valid. So I start checking north of the value, then northeast, then east, then southeast, which at southeast is where I find my first greater than value. After it finds it's first valid number, it then continues from that number, instead of checking if there are other longer paths stemming from the original value.
In conjunction with that, you can see that the printout just returns all paths from each value. Which isn't what I want. I need a way to store the longest current path, then check each path after to see if it's longer. If it is, it's replaced, if not, it stays the same.
I've also attached Ass1Q2_test4.txt
import java.util.*;
import java.io.*;
public class MaxIncreasingSub {
[Code].....
Why this extremely simple program seems to be giving me a negative value for amount of calculations done within one minute ( Just using it as a bit of fun to see how different computers in the office perform).
Java Code:
class Benchmark {
public static void main(String[] args) {
long endTime = System.currentTimeMillis() + 60000;
int count = 0;
for (int i = 0; System.currentTimeMillis() < endTime; i++) {
double x = Math.sqrt(System.currentTimeMillis());
count = i;
}
System.out.print(count + " calculations per minute");
}
} mh_sh_highlight_all('java');
I am getting results between -2.1billion and -3.4billion which to me would make sense since they are not the best computers in the world but I would be expecting a positive value?
Problem: On the form window, after pressing the button, it doesn't give any error and doesn't give any output. It doesn't reply and i have to stop compiling to exit. Why does the IDE do that, is it about my Java codes or Form Window codes ? ( I have two classes named Lexical.java and window.java. Working with Eclipse)
Details: I am working on a project that makes Lexical and Syntax analiysis of commands written in SQL Language. My form is in the attachment. If will be necessary i'll put my codes too.
Attached image(s)
My form looks like this:
<h:form>
<h:panelGrid columns="2" style="margin-bottom:10px" cellpadding="5">
<p:outputLabel for="filetype" value="FileType: " />
<p:selectOneRadio valueChangeListener="#{selectView.changeServerAndSignmethod}" onchange="submit()" id="filetype" value="#{selectView.filetype}">
<f:selectItems value="#{selectView.filetypes}" itemLabel="#{filetype}" itemValue="#{filetype}" />
</p:selectOneRadio>
<p:outputLabel for="signmethod" value="Sign Method: " />
<p:selectOneMenu valueChangeListener="#{selectView.changeServers}" onchange="submit()" id="signmethod" value="#{selectView.signmethod}">
<f:selectItems value="#{selectView.signmethods}" itemLabel="#{signmethod}" itemValue="#{signmethod}" />
[code]....
As you can see there are two listener in my xhtml file one for filetype and other for signmethod. When filtype changes signmethod has to change which in turn changes servers. And if user changes signmethod using dropdown then also server should change. But my problem is when filetype changes, both the listeners are called, as signmethod also changea but the value in event object (e.getNewValue()) is not the new one but old one. Here is the SelectView Bean.This is the static initialisation part just for checking the output at the end of question.
static {
initFiletypes.add("Windows");
initFiletypes.add("Mobile");
initFiletypes.add("Mac");
initFiletypes.add("Solaris");
initFiletypes.add("Jar");
windowsSignmethods.add("Microsoft");
windowsSignmethods.add("Driver");
windowsSignmethods.add("Driver_Pagehash");
windowsSignmethods.add("HDR");
windowsSignmethods.add("Java2");
windowsSignmethods.add("Javame");
windowsSignmethods.add("MicrosftApps");
[code]....
I am changing servers in changeServerAndSignmethod by selecting first signmethod from signmethod arraylist which is giving correct result. But changeServers is also getting fired taking wrong event object's newValue method and changing servers to wrong values. When changeServers is fired bydirectly changing signmethod, by dropdown, it gives correct result. Is there a way I can stop changeServers to fire when the change came from changing filetypes rather than direct change by user on signmethod selectOneMenu.
Need to know how i can store a value in File which is in Properties?
Here I am placing my Properties code :
ReportHTML C:/bea/user_projects/domains/OICDomain/applications/IIMS/IIMS/target/source/REPORT_HTML_DUMP/
ReportEXCEL C:/bea/user_projects/domains/OICDomain/applications/IIMS/IIMS/target/source/REPORT_EXCEL_DUMP/
My Java File :
File destHtmlFolder = new File("C:/bea/user_projects/domains/OICDomain/DOC_SERVER/REPORT_HTML_DUMP");
File srcExcelFolder = new File("C:/bea/user_projects/domains/OICDomain/applications/IIMS/IIMS/target/source/REPORT_EXCEL_DUMP");
I have an XML doc that looks like this:
Java Code:
<?xml version="1.0" encoding="UTF-8"?>
<model>
<id>_1</id>
<nodes>
<id>_2</id>
<stencil>TASK</stencil>
</nodes>
<nodes>
<id>_3</id>
<stencil>TASK</stencil>
</nodes>
</model> mh_sh_highlight_all('java');
I have to create another xml doc with the properties of nodes from the first doc. For the new doc I have to create a parent node called "definitions". Instead of the "model" node in the first doc I have to create a "process" node in the new doc that has an attribute "id" which value is the same as the content of the "id" child node of model. For each "nodes" node in the first doc if their "stencil" child node content equals "TASK" I create a "task" node in the new xml doc.
Java Code: <?xml version="1.0" encoding="UTF-8"?>
<definitions>
<process id="_1">
<task id="_2">
</task>
<task id="_3">
</task>
</process>
</definitions> mh_sh_highlight_all('java');
[code]....
I just wanted to know if this is the correct way to define the respective classes.any way to create and fill the nodes for the new doc using this classes? I am used with DOM parser and I know how to create nodes and fill attribute values, but I have always done this job in a single class, not using different classes for the elements.
I currently have some code using a JFrame. I am trying to access the items in a JList to save them in a TXT file. For this, I am using a "for" loop. The problem is, is that when I try to access the list items, I can't access them. The way I am trying to access the items is by using:
Java Code: listRight.getModel().getSize(); mh_sh_highlight_all('java');
BUT, I can't seem to get this to work. I tried to place this for loop everywhere and I can't access it. I tried accessing it under "public class Window", "private JFrame frmPcPartBuilder", "public static void main(String[] args)", "public void Initialize()" and I can't seem to access the JList. I basically have a save button that saves the list to a text file and the code I am trying to write is called by this button.
Java Code: package com.cooksys.assessment;
import java.awt.EventQueue;
import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JButton;
[code]....