How can I run a java program on Linux?
I have JBuilder's IDE installed on my Linux partition and it works. However I don't know how to compile and test a program without it. Also I tried to install Limewire on Linux and although I've installed the Java SDK on the system. Once before I installed JBuilder and then JBuilder (I guess) installed it again. However it told me it couldn't find the Java Virtual Machine. Isn't this installed with the JDK? I am able to run programs through JBuilder so I can't see why I'd have a problem. Any answers to the above issues would be greatly appreciated.
Go here and work out how to make a simple app to compile and run on the command line: http://java.sun.com/docs/books/tutorial/getStarted/cupojava/unix.html#2b
(You should find the JDK from a directory under the jbuilder directory so use that and not the /usr/local/jdk1.4 in the example.)
Then find the classes or source code of your project and do the same thing to it.
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How can i run my java program with out java language
Hai to every one ..Iam new to java language ...am using windows xp operating system , i did not installed java language in my system .. how can i run a java program with out installing java language... Which files is requied to run java program..?
any one can help me??Hai to every one ..Iam new to java language ...am
using windows xp operating system , i did not
installed java language in my system .. how can i run
a java program with out installing java language...
you ... can ... not ... do ... this
Which files is requied to run java program..?
any one can help me??a JVM. Download it from sun's website.
[url http://java.sun.com/javase/downloads/index.jsp]Download JavaSE here -
How can i run my java program in background process?
hi all,
i am working on desktop monitoring so when i start my program on client machine that is visible to all but i want this program client not visible to all instead of this can be run in background process . so, nobody can see that.
so, how i can do this ?
pls pls help me
thanks in advanced to helper
regards
maulik & riteshthis will run the java program in the background.It'll just use the Windows Java Console instead of the command-line console. It has nothing to do with running as a background process.
Edit: though this might be exactly what the OP wants: not "background process" but "no DOS console". -
How can I run this java program? Please help.
I have jmf installed, sunone running , the file may be in the wrong directory.
It is in some directory nowhere near the java lang dir.
When I try to compile or build i cant. I'm off on a basic thing.
here is the code.
import javax.sound.midi.InvalidMidiDataException;
import javax.sound.midi.MidiDevice;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Receiver;
import javax.sound.midi.MidiMessage;
import javax.sound.midi.ShortMessage;
import javax.sound.midi.SysexMessage;
public class MidiNote
/** Flag for debugging messages.
If true, some messages are dumped to the console
during operation.
private static boolean DEBUG = false;
public static void main(String[] args)
try {
// TODO: make settable via command line
int nChannel = 0;
int nKey = 0; // MIDI key number
int nVelocity = 0;
* Time between note on and note off event in
* milliseconds. Note that on most systems, the
* best resolution you can expect are 10 ms.
int nDuration = 0;
int nArgumentIndexOffset = 0;
String strDeviceName = null;
if (args.length == 4)
strDeviceName = args[0];
nArgumentIndexOffset = 1;
else if (args.length == 3)
nArgumentIndexOffset = 0;
else
printUsageAndExit();
nKey = Integer.parseInt(args[0 + nArgumentIndexOffset]);
nKey = Math.min(127, Math.max(0, nKey));
nVelocity = Integer.parseInt(args[1 + nArgumentIndexOffset]);
nVelocity = Math.min(127, Math.max(0, nVelocity));
nDuration = Integer.parseInt(args[2 + nArgumentIndexOffset]);
nDuration = Math.max(0, nDuration);
MidiDevice outputDevice = null;
Receiver receiver = null;
if (strDeviceName != null)
MidiDevice.Info info = getMidiDeviceInfo(strDeviceName, true);
if (info == null)
out("no device info found for name " + strDeviceName);
System.exit(1);
try
outputDevice = MidiSystem.getMidiDevice(info);
outputDevice.open();
catch (MidiUnavailableException e)
if (DEBUG) { out(e); }
if (outputDevice == null)
out("wasn't able to retrieve MidiDevice");
System.exit(1);
try
receiver = outputDevice.getReceiver();
catch (MidiUnavailableException e)
if (DEBUG) { out(e); }
else
/* We retrieve a Receiver for the default
MidiDevice.
try
receiver = MidiSystem.getReceiver();
catch (MidiUnavailableException e)
if (DEBUG) { out(e); }
if (receiver == null)
out("wasn't able to retrieve Receiver");
System.exit(1);
/* Here, we prepare the MIDI messages to send.
Obviously, one is for turning the key on and
one for turning it off.
MidiMessage onMessage = null;
MidiMessage offMessage = null;
try
onMessage = new ShortMessage();
offMessage = new ShortMessage();
((ShortMessage) onMessage).setMessage(ShortMessage.NOTE_ON, nChannel, nKey, nVelocity);
((ShortMessage) offMessage).setMessage(ShortMessage.NOTE_OFF, nChannel, nKey);
/* test for SysEx messages */
//byte[] data = { (byte) 0xF0, (byte) 0xF7, (byte) 0x99, 0x40, 0x7F, 0x40, 0x00 };
//onMessage = new SysexMessage();
//offMessage = new SysexMessage();
//onMessage.setMessage(data, data.length);
//offMessage = (SysexMessage) onMessage.clone();
catch (InvalidMidiDataException e)
if (DEBUG) { out(e); }
* Turn the note on
receiver.send(onMessage, -1);
* Wait for the specified amount of time
* (the duration of the note).
try
Thread.sleep(nDuration);
catch (InterruptedException e)
if (DEBUG) { out(e); }
* Turn the note off.
receiver.send(offMessage, -1);
* Clean up.
receiver.close();
if (outputDevice != null)
outputDevice.close();
} catch (Throwable t) {
out(t);
System.exit(0);
private static void printUsageAndExit()
out("MidiNote: usage:");
out(" java MidiNote [<device name>] <note number> <velocity> <duration>");
out(" <device name>\toutput to named device");
out(" -D\tenables debugging output");
System.exit(1);
private static void listDevicesAndExit(boolean forInput, boolean forOutput) {
if (forInput && !forOutput) {
out("Available MIDI IN Devices:");
else if (!forInput && forOutput) {
out("Available MIDI OUT Devices:");
} else {
out("Available MIDI Devices:");
MidiDevice.Info[] aInfos = MidiSystem.getMidiDeviceInfo();
for (int i = 0; i < aInfos.length; i++) {
try {
MidiDevice device = MidiSystem.getMidiDevice(aInfos);
boolean bAllowsInput = (device.getMaxTransmitters() != 0);
boolean bAllowsOutput = (device.getMaxReceivers() != 0);
if ((bAllowsInput && forInput) || (bAllowsOutput && forOutput)) {
out(""+i+" "
+(bAllowsInput?"IN ":" ")
+(bAllowsOutput?"OUT ":" ")
+aInfos[i].getName()+", "
+aInfos[i].getVendor()+", "
+aInfos[i].getVersion()+", "
+aInfos[i].getDescription());
catch (MidiUnavailableException e) {
// device is obviously not available...
if (aInfos.length == 0) {
out("[No devices available]");
System.exit(0);
e
* This method tries to return a MidiDevice.Info whose name
* matches the passed name. If no matching MidiDevice.Info is
* found, null is returned.
* If forOutput is true, then only output devices are searched,
* otherwise only input devices.
private static MidiDevice.Info getMidiDeviceInfo(String strDeviceName, boolean forOutput) {
MidiDevice.Info[] aInfos = MidiSystem.getMidiDeviceInfo();
for (int i = 0; i < aInfos.length; i++) {
if (aInfos[i].getName().equals(strDeviceName)) {
try {
MidiDevice device = MidiSystem.getMidiDevice(aInfos[i]);
boolean bAllowsInput = (device.getMaxTransmitters() != 0);
boolean bAllowsOutput = (device.getMaxReceivers() != 0);
if ((bAllowsOutput && forOutput) || (bAllowsInput && !forOutput)) {
return aInfos[i];
} catch (MidiUnavailableException mue) {}
return null;
private static void out(String strMessage)
System.out.println(strMessage);
private static void out(Throwable t)
t.printStackTrace();Please post your code using code tags.
When I try to compile or build i cant.What is your question? Exactly what error message do you get? -
How can I run a java-application on starting of Windows 2000
How can I run a java-application without any user on starting of Windows 2000?
For example, if the computer is restarted and nobody enter into it yet, my java-application should run anyway.
How can I do that?Hi, you have to put it in a Windows service.
To do this you have a program, Srvany.exe that allow to insert a .exe or .bat program in a Windows service.
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Regards,
Ivan. -
How do i run a java program an another directory?
How do I run a java program that's in a different directory?
I have been doing this in the command line:
java "C:\Document and Settings\freeOn\Desktop\Java\Test\test"
and I get
Exception in thread "main" java.lang.NoClassDefFoundError:
C:\Document and Settings\freeOn\Desktop\Java\Test\test
I just thought there might be a quick way to do this and not
have to cd to the following dir evertime i want to run an app in
console.
The test.java file is this:
import java.io.*;
public class test {
public static void main(String args[]) {
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How can I run external console program, printing output to JTextPane?
How can I run external console program, printing output to JTextPane?
I have a console app. written in C++ and I would like to run in it from java swing app. and I would like to see its output in a JTextPane.I have used this article
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
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How can i apply this java program for a jsp page?
import java.io.*;
import java.util.*;
public class FileProcessing
//create a vector container for the input variables
Vector variables = new Vector();
//create a vector container for the constants
Vector constants = new Vector();
/*create a string expression container for the equation
as read from the file */
String expression = " ";
//create double result container for the final result
double result = 0;
public boolean processFile(String filename,String delim)
//index for values vector
int num_values = 0;
//index for constants vector
int num_constants = 0;
//current line being read from the external file.
String curline = " ";
//start reading from the external file
try
FileReader fr = new FileReader(filename);
BufferedReader br = new BufferedReader(fr);
while(true)
curline = br.readLine();
if(curline == null)
break;
//determine the type of current interaction
boolean variable = curline.startsWith("input");
boolean constant = curline.startsWith("constant");
boolean equation = curline.startsWith("equation");
boolean output = curline.startsWith("result");
//on input variables
if(variable)
StringTokenizer st = new StringTokenizer(curline,delim);
int num = st.countTokens();
int count=0;
while(st.hasMoreTokens())
String temp = st.nextToken();
if(count==1)
byte b[]= new byte[100];
System.out.println(temp);
System.in.read(b);
String inputval = (new String(b)).trim();
variables.add(num_values,inputval);
num_values++;
count++;
// on constant values
if(constant)
StringTokenizer st = new StringTokenizer(curline,delim);
int num = st.countTokens();
int count = 0;
while(st.hasMoreTokens())
String temp = st.nextToken();
if(count==1)
byte b[]= new byte[100];
System.out.println(temp);
System.in.read(b);
String cons = (new String(b)).trim();
constants.add(num_constants,cons);
num_constants++;
count++;
// on equation
if(equation)
StringTokenizer st = new StringTokenizer(curline,delim);
int num = st.countTokens();
int count = 0;
while(st.hasMoreTokens())
String temp = st.nextToken();
if(count==2)
this.expression = temp;
count++;
// now we are ready to evaluate the expression
if(output)
org.nfunk.jep.JEP myparser= new org.nfunk.jep.JEP();
myparser.setAllowAssignment(true);
for(int i=1;i<variables.size()+1;i++)
String name = "arg"+Integer.toString(i);
myparser.addVariable(name,new Double(variables.get(i-1)
.toString()).doubleValue());
for(int i=1;i<constants.size()+1;i++)
String name = "arg" +Integer.
toString(i+variables.size());
myparser.addConstant(name,new Double(constants.get(i-1).toString()));
//output is obtained as follows
myparser.parseExpression(expression);
result = myparser.getValue();
System.out.println("Assay value: "+result);
catch(Exception e)
System.out.println(e.toString());
return true;
public static void main(String[] args)
FileProcessing fp = new FileProcessing();
fp.processFile("input.eqn",":");
}//my text file name is: "input.eqn" (given below)
input:Enter Value1:arg1
input:Enter Value2:arg2
input:Enter Value3:arg3
constant:arg4
constant:arg5
Equation:arg1+arg2+arg3
result:how can i apply this java program for a jsp pagewhy do you want to do this ?
Your program reads from a file on the disk and formats based on a patterm.
Jsp is not intended for such stuff.
ram. -
How can i run the java bean sample program download from OTN
hello to all
i have a p[roblem. i have downloaded the sample progam from oracle web site which is a java code that connect with the oracle and shows a form. how can i run the from.
can any body help me pleaSEEE
thanks
kamran ahmedHi Darryl.Burke
So your telling, we cannot run our Java Program when system shutdowns...In my application, when user has schedule for next days and he shutdown his PC. On the next day when System Started i should able to get back my schedule on the Specified time(I'm TimerTask class in Java)... How can i achieve this using Java? can u tell me clearly.. -
How can i run a java class file from shell?
Hi all,
I've a .class file named "File" that contains Main method, it is in the package "File2".
How can I run it by shell command?
PS: "java -cp . file" doesn't work it launch->
Exception in thread "main" java.lang.NoClassDefFoundError: File2/File (wrong name: File2/File)
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java -cp . File2/File
*if you were to do the following then you would have the problem you describe
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How can you get a java program working on a cell phone?
I was thinking of making some stuff for cell phones so i was wondering how you get a normal java program to work on cells.
its all j2me - midlet package....Huh? The jsr-118 MID profile alone has 11 packages, one of which is javax.microedition.midlet. Notj2me - midlet.
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you can use net beans midlet packge add-on.Only it's called the NetBeans Mobiliity Pack.
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just search on google.Yes, but with which keywords?
@OP:
NetBeans mobility pack comes with a short tutorial and several samples, you also need to download the latest WTK as the ver. 2.2 which comes bundled with NetBeans is just too buggy to work with. Then there are the manufacturer-specific SDKs from Nokia, Motorola, Sony Ericsson and (maybe) others.
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Vocab.scpt:-
# Script to start: Vocab Version: 1.0.0
do shell script "cd /Applications/Vocab; Java Vocab"
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thanks.here there is an example about how a PL/SQL procedure can
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http://download-east.oracle.com/docs/cd/A87860_01/doc/appdev.817/a76936/dbms_pi2.htm#1003384
Apart from that you have Java Stored Procedures option
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Java Stored Procedures Developer's Guide Contents / Search / Index / PDF
http://download-east.oracle.com/docs/cd/B10501_01/java.920/a96659.pdf
Joel P�rez -
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