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java.io.IOException: Cannot run program "clear"; Caused by: java.io.IOException: CreateProcess error=2;

These errors have been generated when running a chatbot java program on windows platform in the Netbeans IDE.
Maybe I am missing the build path for some process.
java.io.IOException: Cannot run program "clear": CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at java.lang.Runtime.exec(Runtime.java:620)
at java.lang.Runtime.exec(Runtime.java:450)
at java.lang.Runtime.exec(Runtime.java:347)
at chatbot.chatbot.main(chatbot.java:29)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.<init>(ProcessImpl.java:386)
at java.lang.ProcessImpl.start(ProcessImpl.java:137)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
... 4 more
BUILD SUCCESSFUL (total time: 4 seconds)
Can anyone please provide me a solution to this problem..

Executing Windows shell commands using 'not-installed' Java

I can't install Java on the computer, I only have a 'Java folder' on my desktop. Because of that executing 'cmd.exe' commands with Java doesn't work. Is there any method of pointing to the 'cmd.exe' and telling java to run a command using it?
I mean somethind similar to what I do in my 'start.bat' file i use to run .jar's - start C:\Users\kamilkime\Desktop\JEclipse\Java\jdk1.7.0_75\bin\java -jar Calculator.jar
I tried using this two methods, both don't work and throw the same exception:
//Method 1
Runtime.getRuntime().exec("cls");
//Method 2
ProcessBuilder builder = new ProcessBuilder("cls");
builder.start();
//Exception stacktrace
java.io.IOException: Cannot run program "cls": CreateProcess error=2, Nie można odnaleźć określonego pl
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
at java.lang.Runtime.exec(Runtime.java:617)
at java.lang.Runtime.exec(Runtime.java:450)
at java.lang.Runtime.exec(Runtime.java:347)
at com.gmail.kamilkime.Main.clearConsole(Main.java:82)
at com.gmail.kamilkime.Main.start(Main.java:61)
at com.gmail.kamilkime.Main.main(Main.java:36)
Caused by: java.io.IOException: CreateProcess error=2, Nie można odnaleźć określonego pl
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.<init>(ProcessImpl.java:385)
at java.lang.ProcessImpl.start(ProcessImpl.java:136)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
... 6 more
//edit 08.10.2015
Ok, so thanks to #9dan I've managed to run a console window, but... Now I can't do anything with it - cannot println() a message, cannot get a user input. Is it posibble to do sth like that (printing/getting input)?
BTW, the thing I'm trying to do the whole time is finding a way to enable the console program by double-clicking the .jar file, not by using 'java' command in 'cmd.exe'.
Now, I'm using this code and I'm stuck - I don't know what to do: http://pastebin.com/VLkr1RFd

IOException when starting a process

I am trying to run some Mercurial commands from a java program. I build my Process using a ProcessBuilder like this:
final ProcessBuilder procBuilder = new ProcessBuilder("hg", "log");
procBuilder.directory(new File("/Users/feuerball/workspace/www"));
final Process proc = procBuilder.start();
The folder www contains a Mercurial repository, hg is installed and in the systems PATH. But my program throws an exception when I start the process. This is the stacktrace:
Exception in thread "main" java.io.IOException: Cannot run program "hg" (in directory "/Users/feuerball/workspace/www"): error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1042)
at de.feuerball.tests.Test.main(Test.java:16)
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:185)
at java.lang.ProcessImpl.start(ProcessImpl.java:134)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1023)
... 1 more
Why do I get this error?
Update
To show that the directory does exist, I have changed the code a little bit:
final File repo = new File("/Users/feuerball/workspace/www");
System.out.println("Directory? " + repo.isDirectory());
System.out.println("Readable? " + repo.canRead());
System.out.println("Writable? " + repo.canWrite());
final ProcessBuilder procBuilder = new ProcessBuilder("hg", "log");
procBuilder.directory(repo);
final Process proc = procBuilder.start();
Now here is the proof:
Directory? true
Readable? true
Writable? true
Exception in thread "main" java.io.IOException: Cannot run program "hg" (in directory "/Users/feuerball/workspace/www"): error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1042)
at de.brushmate.tests.Test.main(Test.java:22)
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:185)
at java.lang.ProcessImpl.start(ProcessImpl.java:134)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1023)
... 1 more

ProcessBuilder doesn't use the env variable PATH, it can't find "hg", you need to specify the absolute path to "hg" (like /usr/bin/hg if you're using Linux)

Error under the following program to write R Script separately

Calling R in java-Rcaller
After following above link I've created new "myScript.R" seperately.
Please tell me that it is showing "save workspace" for saving. I've saved it as file with .R extension. Please correct me if I'm wrong.
I'm recieving the following error on running this as same Java program (provided in above link) created in Netbeans IDE for connecting RCaller with Java:
run:
java.io.IOException: Cannot run program "Rscript": CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1042)
at java.lang.Runtime.exec(Runtime.java:615)
at java.lang.Runtime.exec(Runtime.java:448)
at java.lang.Runtime.exec(Runtime.java:345)
at javaapplicationrcaller2.JavaApplicationRCaller2.<init>(JavaApplicationRCaller2.java:41)
at javaapplicationrcaller2.JavaApplicationRCaller2.main(JavaApplicationRCaller2.java:25)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.<init>(ProcessImpl.java:288)
at java.lang.ProcessImpl.start(ProcessImpl.java:133)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1023)
... 5 more
BUILD SUCCESSFUL (total time: 0 seconds)

How to run setup.exe file using java

I am developing an java application from which I have to run xyz_setup.exe installer. I tried the following code
String command = "C:\\xyz_setup.exe";
Runtime.getRuntime().exec(command);`
But it was throwing the following error
java.io.IOException: Cannot run program "C:\Users\NewtonApples\Downloads\idman614.exe": CreateProcess error=740, The requested operation requires elevation
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
at java.lang.Runtime.exec(Runtime.java:615)
at java.lang.Runtime.exec(Runtime.java:448)
at java.lang.Runtime.exec(Runtime.java:345)
at upendra.OpenExternalApplication.main(OpenExternalApplication.java:19)
Caused by: java.io.IOException: CreateProcess error=740, The requested operation requires elevation
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.<init>(ProcessImpl.java:189)
at java.lang.ProcessImpl.start(ProcessImpl.java:133)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1021)
... 4 more
Can any one suggest me how to do this?

Java (or likely any other process which uses CreateProcess system call directly) is not good with executables requiring access elevation.
You can get around that by executing your program via shell:
String command = "C:\\setup.exe";
Runtime.getRuntime().exec("cmd /c "+command);