runtime.exec

问题 I want to create diff of two files. I tried searching for code in Java that does it, but didnt find any simple code/ utility code for this. Hence, I thought if I can somehow run linux diff/sdiff command from my java code and make it return a file that stores the diff then it would be great. Suppose there are two files fileA and fileB. I should be able to store their diff in a file called fileDiff through my java code. Then fetching data from fileDiff would be no big deal. 回答1: Have a look at

问题 In my Java application, I want to run a batch file that calls " scons -Q implicit-deps-changed build\file_load_type export\file_load_type " It seems that I can't even get my batch file to execute. I'm out of ideas. This is what I have in Java: Runtime. getRuntime(). exec("build.bat", null, new File(".")); Previously, I had a Python Sconscript file that I wanted to run but since that didn't work I decided I would call the script via a batch file but that method has not been successful as of

问题 I'm using Runtime.getRuntime().exec in eclipse to run another java program from the current program. I've used the following code. InputStreamReader isr=new InputStreamReader(System.in); BufferedReader br=new BufferedReader(isr); System.out.println("Enter the class name"); String s=br.readLine(); String str="XYZ"; String[] cmd = {"java","-cp", "C:/Users/..../workspace/Testing/bin",s,str}; Process pro=Runtime.getRuntime().exec(cmd); I'm also passing a string "XYZ" to that program. That program

问题 I want to find out how to open any exe in Windows using Java code. I have searched Google before and they only show me part of the code that they use, I think, because it doesn't seem to compile. I have downloaded JDK 7 to compile. I don't use Eclipse at the moment and also explaining what I had to do to get it to work in detail would help a lot. to what Sri Harsha Chilakapati said: would i need to create a class for the code? Thanks to those who answered but i didn't quite get what you meant

问题 I have problem with Runtime.exec() in Java My code: String lol = "/home/pc/example.txt"; String[] b = {"touch", lol}; try { Runtime.getRuntime().exec(b); } catch(Exception ex) { doSomething(ex); } It's working good but when I trying changle variable "lol" files doesn't create in hard disk for instance: String lol = x.getPath(); where getPath() returns String What should I do ? Thanks for your reply :) 回答1: Here is the solution to your problem . I faced a similar problem and this worked for me

问题 I have looked at many questions regarding input/output from spawned process in Java but I still can't figure out what is wrong with my program. It's really short and simple but it doesn't work. I am using the exec() method of the Runtime object to create the new process (I know that ProcessBuilder is probably better, but this is for a simple assignment and I don't really have to worry about the stderr of the spawned process). I am running the "Processor" class myself from the IDE/command line

问题 How do I call an external process in a thread safe way from inside an EJB? ProcessBuilder is not thread safe, as stated in the javadoc. Apache commons exec says nothing about thread-safety and I am not confident in Runtime.exec either. What's the proper way? let me add some code so people won't think I am abusing, this code sometimes works, sometimes not public int startTask(Logger logger, String expectPath, String expectScriptPath, long ticket) throws IOException { Runtime r = Runtime

问题 I have a perl script called pbp that takes an html file as an argument and then creates an output file. Here is my current code. Infile is obtained earlier from a JFile Chooser. I don't get any errors but there is no ouput from the perl script. try { Process p = Runtime.getRuntime().exec(new String[] {"perl", "C:\\Users\\Roger\\Downloads\\The_Long-Awaited_Product_Specification_and_Sample_Files\\casey\\pbp", inFile.getAbsolutePath()}); p.getInputStream().close(); p.getOutputStream().close(); p

问题 I am working with Hadoop 1.0.3 on Ubuntu 12.04, Eclipse 3.7 and am developing a GUI to execute Hadoop jobs using Windowbuider Pro. I need to execute the jar files containing my codes from the GUI. I have used the runtime.getruntime.exec() method with some success. However, while it does execute DFS-specific commands, it cannot execute .jar files, like the PiEstimator that comes bundled with the distribution. My code is as follows: JButton btnYrhtrdsf = new JButton("Start Daemons");

问题 I would like to run a command on the command prompt (in Windows) that will open Internet Explorer with certain perks. Scenario (starting with no Internet Explorer opened): Run "iexplore google.ca" to open google.ca, as a new tab, on Internet Explorer Run "iexplore yahoo.ca" again to open yahoo.ca, as a new tab, on the recently opened Internet Explorer End result should have 2 tabs on one Internet Explorer application/window. I would like the above behavior but Internet Explorer will just open