We can block any window program using Java. This is done using the window taskkill command.
To run this command we make use of Runtime.getRuntime.exec
Language Used:
Java
Git Repo:
https://github.com/csanuragjain/extra/tree/master/BlockProgram
What Happens:
1) User give the name of the windows process to kill for example for killing IE i give iexplore.exe
2) Program checks all the process every 30 seconds and see if the blocked process is running
3) If the blocked process is running then it opens the webcam and takes the picture of the person running it and saves it in the current project directory.
4) Post that it kills the blocked process by running taskkill command
Maven Dependency:
Add below dependency for adding cam support in pom.xml
<dependency>
<groupId>com.github.sarxos</groupId>
<artifactId>webcam-capture</artifactId>
<version>0.3.10</version>
<scope>test</scope>
</dependency>
Program:
Main method:
public static void main(String[] args) throws InterruptedException, IOException {
String[] monitorRunningProcess=new String[]{"tasklist.exe"};
String processToBlock="";
System.out.println("Enter the process to be blocked");
Scanner s=new Scanner(System.in);
processToBlock = s.nextLine();
s.close();
String[] killProgram=new String[]{"taskkill","/F","/IM",processToBlock};
System.out.println("Initiated blocking "+processToBlock);
while(true)
{
boolean isProgramRunning=monitorProgram(monitorRunningProcess, processToBlock);
if(isProgramRunning)
{
snapshotCounter++;
System.out.println("Someone ran "+processToBlock);
Webcam webcam = Webcam.getDefault();
webcam.setViewSize(new Dimension(640, 480));
webcam.open();
ImageIO.write(webcam.getImage(), "PNG", new File("User"+snapshotCounter+".png"));
webcam.close();
System.out.println("Picture of the Person who ran blocked program is stored at "+new File("").getAbsolutePath()+File.separator+"User"+snapshotCounter+".png");
System.out.println("Killing "+processToBlock);
runProgram(killProgram);
}
Thread.sleep(30000);
}
}
How it works:
1) tasklist.exe defines all the running process in windows
2) We ask the user to give the process to be blocked
3) We prepare a string variable with the command to kill the process as taskkill /F /IM <Process to kill>
4) Now we run an infinite loop
5) We run tasklist.exe using module monitorProgram which tells if the blocked process is currently running or not
5) If we found that blocked program is running then we take the snapshot from webcam (https://cooltrickshome.blogspot.in/2016/11/take-snapshot-from-webcam-using-java-in.html)
6) Post that we kill the program simply by passing the string variable (containing taskkill) made at Step3 to runProgram module
7) After that we wait for 30 seconds and repeat from step 5
monitorProgram method:
public static boolean monitorProgram(String[] program, String processToMonitor) throws InterruptedException, IOException
{
boolean isprocessRunning=false;
Process proc = Runtime.getRuntime().exec (program);
InputStream progOutput = proc.getInputStream ();
InputStreamReader inputReader=new InputStreamReader(progOutput);
BufferedReader reader = new BufferedReader(inputReader);
String line;
while ((line = reader.readLine()) != null)
{
if(line.contains(processToMonitor))
{
isprocessRunning=true;
}
}
proc.waitFor ();
return isprocessRunning;
}
How it works:
1) We run the process passed in argument
2) We check all the output created by the program running in step 1
3) If the output contains the processToMonitor then we return true else false
runProgram method:
public static void runProgram(String[] program) throws InterruptedException, IOException
{
Process proc = Runtime.getRuntime().exec (program);
InputStream progOutput = proc.getInputStream ();
InputStreamReader inputReader=new InputStreamReader(progOutput);
BufferedReader reader = new BufferedReader(inputReader);
String line;
while ((line = reader.readLine()) != null)
{
System.out.println(line);
}
if (0 == proc.waitFor ()) {
System.out.println("Process completed successfully");
}
else
{
System.out.println("Their was some issue while running the program");
}
}
How it works:
1) Already discussed at https://cooltrickshome.blogspot.in/2016/11/runmonitor-external-program-using-java.html
Sample Output:
Enter the program to block
iexplore.exe
Initiated blocking iexplore.exe
Someone ran iexplore.exe
Picture of the Person who ran blocked program is stored at C:\Users\anurag\workspace\cooltrickshome\User1.png
Killing iexplore.exe
SUCCESS: The process "iexplore.exe" with PID 3516 has been terminated.
SUCCESS: The process "iexplore.exe" with PID 7432 has been terminated.
Process completed successfully
Full Code:
package com.cooltrickshome;
import java.awt.Dimension;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Scanner;
import javax.imageio.ImageIO;
import com.github.sarxos.webcam.Webcam;
public class BlockWindowsProgram {
/**
* @param args
* @throws IOException
* @throws InterruptedException
*/
static int snapshotCounter=0;
public static void main(String[] args) throws InterruptedException, IOException {
String[] monitorRunningProcess=new String[]{"tasklist.exe"};
String processToBlock="";
System.out.println("Enter the process to be blocked");
Scanner s=new Scanner(System.in);
processToBlock = s.nextLine();
s.close();
String[] killProgram=new String[]{"taskkill","/F","/IM",processToBlock};
System.out.println("Initiated blocking "+processToBlock);
while(true)
{
boolean isProgramRunning=monitorProgram(monitorRunningProcess, processToBlock);
if(isProgramRunning)
{
snapshotCounter++;
System.out.println("Someone ran "+processToBlock);
Webcam webcam = Webcam.getDefault();
webcam.setViewSize(new Dimension(640, 480));
webcam.open();
ImageIO.write(webcam.getImage(), "PNG", new File("User"+snapshotCounter+".png"));
webcam.close();
System.out.println("Picture of the Person who ran blocked program is stored at "+new File("").getAbsolutePath()+File.separator+"User"+snapshotCounter+".png");
System.out.println("Killing "+processToBlock);
runProgram(killProgram);
}
Thread.sleep(30000);
}
}
public static boolean monitorProgram(String[] program, String processToMonitor) throws InterruptedException, IOException
{
boolean isprocessRunning=false;
Process proc = Runtime.getRuntime().exec (program);
InputStream progOutput = proc.getInputStream ();
InputStreamReader inputReader=new InputStreamReader(progOutput);
BufferedReader reader = new BufferedReader(inputReader);
String line;
while ((line = reader.readLine()) != null)
{
if(line.contains(processToMonitor))
{
isprocessRunning=true;
}
}
proc.waitFor ();
return isprocessRunning;
}
public static void runProgram(String[] program) throws InterruptedException, IOException
{
Process proc = Runtime.getRuntime().exec (program);
InputStream progOutput = proc.getInputStream ();
InputStreamReader inputReader=new InputStreamReader(progOutput);
BufferedReader reader = new BufferedReader(inputReader);
String line;
while ((line = reader.readLine()) != null)
{
System.out.println(line);
}
if (0 == proc.waitFor ()) {
System.out.println("Process completed successfully");
}
else
{
System.out.println("Their was some issue while running the program");
}
}
}
Hope it helps :)
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