How To Kill System Process From Java Code

Sep 7, 2014

I need to kill or remove windows system process like cmd.exe from java code. Like removing it from end process in task mgr. I tried below code but its not removed. Is there a better way we can do this.

killing a system process from java code will create any issues?

public static void main(String[] args) throws Exception {   String[] cmd = { "cmd.exe" };  
Process p = Runtime.getRuntime().exec(cmd);   p.destroy();   }

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How To Process / Parse XML Data In Java

Jul 28, 2014

I'm just starting out with learning how to process/parse XML data in Java, following online code/tutorials. I am currently only printing out "catalog."

XML File that I'm trying to read: URL...

import java.io.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

[code]...

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Java Runtime Get Result Output From Prompt / Large File - Process Will Hang

Aug 13, 2014

I am using java process to start a system command in windows

Runtime r = Runtime.getRuntime();
Process pr = r.exec(cmdString);

I want to get the prompt out put from cmdString = "cmd /c type fileSmallSize"->>>> It is ok the have the content of the file when file is small.

However, for a large file java process will hang and no Exception occurred, what is the problem?

The easiest testing you can try on the logging.properties file in java.

public static String executeCmdAndReturnPromptResult(String cmdString)
throws Exception {
LOGGER.entering(CLASSNAME,
"Entering executeCmdAndReturnPromptResult()", cmdString);
String cmd = cmdString;

[Code] ....

It seemed to me that the bufferSize is limited so that I can only have it less than a default one, how to increase it?

My question now is how to increase the size of buffer in order to read a larger InputStream ?
BufferedInputStream() default size is
private static int defaultCharBufferSize = 8192;
private static int defaultExpectedLineLength = 80;

How to make it larger and working? I tried to increase the defaultCharBufferSize to 500000000 but it did not work!

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Heap Dump Generated With Read-write Permissions For Java Process Owner

Apr 14, 2014

I have a question regarding the permissions set for generated heap dumps.
 
I have some Jetty servers running on Linux (Java 6 64 bit / Java 7 64 bit) with the following Java arguments:
 
-XX:+HeapDumpOnOutOfMemoryError
-XX:HeapDumpPath=/opt/apps/heapdump
 
When there is a out-of-memory exception a heap dump is automatically generated by the JVM. But it seems that the heap dump permisions are set to read-write for owner only (600).

When I create files then they have by default read-write for owner and group/all read access (644).
 
$ ls -l
total 795432
-rw------- 1 bamboop bamboo 811322265 Apr 14 09:18 java_pid337.hprof
-rw-r--r-- 1 bamboop bamboo         6 Apr 14 12:57 test
 
Here the umask set for the server running the Java processes
 
$ umask 
0022

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Jan 6, 2015

I'm making a stock system for the heck of it,so everything was going great until I hit the loop I am trying to use a for loop to add stock to the stock system,any way the question is maily about loops.How come I cannot declare a variable outside a loop and assign a value to it,for example I can declare as follows and I will not get an error,

for(int i=0;i<10;i++){
System.out.println("example");

}

but in my code(and yes its the only error I get I tested it) I get an error and can only declare and assign a value inside the loop,the reason for this is because I wanted to get the value from another class and use it in the loop ok so heres the code from both classes.

public class mainn{

public static void main(String [] args){
stock first = new stock();
int internal;
internal = first.wanted;

[code]....

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How To Get System Time In Java

Jun 1, 2014

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Process p = Runtime.getRuntime.exec(command)

In progress bar status is set using setSelection method which takes int as argument. How to indicate the progress of process in progress bar, because I don't have int value to pass into setSelection method of progressbar.

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Jul 31, 2014

I have been working on making a Java application for the Game RuneScape. My goal is to make an Application to where you register on the application and it saves the information in a file. I am also looking to make it so you can transfer money from Runescape to your Account on my Application by submitting a ticket. When you submit a ticket you get assisted by one of the moderators, they trade you in the game and take the money, and then they take that money out of their current account. Admins are allowed to give moderators money via their account or another method. My issue is creating the ticket system. I want to be able to do this all via the application. So basically what i have currently for the application is a chat room, with different rooms available to go into by the users. So I need to make the tickets show up only to Moderators and Admins in the general chat room.

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Java Objects And Classes - System Of Linear Equation

Mar 15, 2015

The question states: Design a class named LinearEquation

for a 2 x 2 system of linear equations:

ax + by = e

cx + dy = f

Where

x =

ed − bf/ad − bc

y =

af − ec/ad − bc

The class contains:

- Private data fields a, b, c, d, e, and f.
- A constructor with the arguments for a, b, c, d, e, and f.
- Six get methods for a, b, c, d, e, and f.
- A method named isSolvable() that returns true if ad−bc is not 0.
- Methods getX() and getY() that return the solution for the equation.

Write a test program that prompts the user to enter a, b, c, d, e, and f and displays the result. If ad − bc is 0, report that "The equation has no solution."

I believe that my program is correct because I am able to compile it and get no errors, however I have no clue how to display the information for x and y or display this equation has no solution if ad-bc=0.

Java Code:

import java.util.Scanner;
public class Exer911 {
public static void main(String[] args){
// Create a scanner system to hold the numbers for each variable
Scanner input = new Scanner(System.in);
// Prompt the user to enter a number for each of the variables

[Code] ....

How to get the information to display ....

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Oct 28, 2014

I am maintaining an existing Java product (which has a HUGE code-base). I discovered that it is setting (and getting) two of its internal passwords as Java system properties, at no less than 4-5 different places (methods). Now, the problem is, the passwords are being stored as plain text in the Java system properties, and so, the same is visible to external entities, as the application is not using any Java Security Manager. For example, if the application (process) is running on port number 1234, we can run the Java command:

jinfo -sysprops 1234

to view both the passwords as values of the corresponding Java system properties. I wish to ask if there is any remedy to this without changing the existing code-base too much? The desired effect would be to "hide" the two Java system properties (denoting the two passwords) from all external entities.

It may be noted that introducing a Java Security Manager into the application may not be a solution, as if we revoke read permissions from the said two Java system properties using the Java Security Manager, the application codes which read those properties would crash. Same is applicable for storing the passwords in encrypted form, as that would crash all codes within the application which are expecting to read the passwords in clear text form.

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Oct 11, 2014

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Newton Raphson Method - Multivariable(x and y) Page Not Found

How to use this library or find a library that can be used in an android application would be amazing.

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Oct 23, 2014

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The explanation is a bit lengthy because I just tried to explain everything in one shot.

Link to the question

java - Show a System Tray notification or Desktop notification from the web application

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Feb 11, 2014

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Can Use Java Code From OpenScript Or APIs In Separate Java Program?

Oct 24, 2014

I want to develop a Java program that uses OpenScript APIs to test my applications. The OpenScript framework automatically creates the Java Code so I was thinking of either using this code or create my own using the APIs.
 
I tried both options using NetBeans but I'm getting errors everywhere starting with the library import. I'm pretty new to Java so I'm sure I'm missing a lot of things here. I pasted the code below from the OpenScript framework that want to use in a stand-alone file for your reference.,
 
import oracle.oats.scripting.modules.basic.api.*;
import oracle.oats.scripting.modules.browser.api.*;
import oracle.oats.scripting.modules.functionalTest.api.*;
import oracle.oats.scripting.modules.utilities.api.*;
import oracle.oats.scripting.modules.utilities.api.sql.*;

[Code] ....

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I didn't ask you to do my home work . tell me how to communicate two java program using named piped concept.

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