processbuilder

问题 I try to get the memory usage of a process started via Java. Can someone give me a hint how to do it for the example Notepad.exe? // Memoryusage of the Java programm Runtime runtime=Runtime.getRuntime(); total = runtime.totalMemory(); System.out.println("System Memory: " + total); ProcessBuilder builder = new ProcessBuilder("notepad.exe"); Process p = builder.start(); Thanks for your help! 回答1: this post has your answer Java ProcessBuilder memory quoting top answer: The new process runs

问题 I have a Java program which is being started via ProcessBuilder from another Java program. System.exit(0) is called from the child program, but for some of our users (on Windows) the java.exe process associated with the child doesn't terminate. The child program has no shutdown hooks, nor does it have a SecurityManager which might stop System.exit() from terminating the VM. I can't reproduce the problem myself on Linux or Windows Vista. So far, the only reports of the problem come from two

问题 This question already has answers here : Calling an external application (i.e. Windows Calculator) in a GWT web application (4 answers) Closed 5 years ago . When I click the calculator button in my GWT application its trying to call the External Windows Calculator (External webapps). I used to achieve this on ProcessBuilder class in java side. But i will not able to do it. i have seen one post in stackoverflow similar problem like what i am facing now Post link. There i could not see any

问题 I'am using the storm's multilang throughing PHP. But it seems have some problem. Then my spout is a php script which read contents from a file.And in the beginning of the 4Mb content,which runs correctly. But then php process will blocks in the write(1,xxxx...,when i strace -p the php spout. But the next bolt process is blocked in the read(0, i doubt this is the storm's problem,but the question is why each time the spout analyse is 4Mb, and is it a java processBuild's deadlock? How to avoid

问题 I have problems sending data from java to a (linux)-subprocess created by ProcessBuilder/Process . A shell-only based basic example would look like as follows and works fine. echo "hello world" | cat - >/tmp/receive.dat Now, I want to substituted the echo "hello world" by a java program which should internally create a new process (the cat - >/tmp/receive.dat ) and then send data to it. I tried the following, but the file /tmp/receive.dat remains untouched: String[] cmdArray = { "/bin/cat", "

问题 I am trying to call an external Java class file from a servlet running on Tomcat 6, Windows 7, 64bit . There are already some threads on this subject around, but none are really helping me. Fyi, I have successfully been able to do this if I run it from the shell directly. Im using a ProcessBuilder to execute the command like this ProcessBuilder bp = new ProcessBuilder("cmd.exe","/C","java", "TheExternalClass", "ParameterA" }); I'm also consuming the errorStream and inputStream from the

问题 I have a code: import javax.swing.SwingUtilities; import java.io.File; import java.io.IOException; class RunIt{ if (args.length==0) { ProcessBuilder pb = new ProcessBuilder("java","-Xmx768m","RunIt","anArgument"); pb.directory(new File(".")); try { Process process = pb.start(); } catch(IOException e) { e.printStackTrace(); } System.exit(0); } SwingUtilities.invokeLater(new Runnable(){public void run(){new classWithJFrameInConstructor();}}); } import JFrame; class classWithJFrameInConstructor{

问题 I have sample java code like below. String testEfdDirectoryPath="D:\\test"; String efdExecutable = "test.cmd"; File executableFile = new File(testEfdDirectoryPath, efdExecutable); ProcessBuilder pb=new ProcessBuilder(); $$pb.command("cmd.exe","/C",executableFile.toString());$$ pb.directory(new File(testEfdDirectoryPath)); Process p=pb.start(); int code=p.waitFor(); System.out.print(code); In test.cmd there is actually a call to another java application. Unless I change the $$ marked line to

问题 I have Groovy Maven2 test project with TestNG and Surefire plugin enabled. I want to launch external process (*.cmd file which start some *.exe file) in last test method, finish my tests and left process running after tests. I tried the following codes to do it: 1 attempt def builder = new ProcessBuilder('cmd','/c <name>.cmd') builder.directory( ( new File( <path_to_working_directory> ) ) ) builder.start() 2 attempt (with and without start cmd option) Runtime.getRuntime().exec( "cmd /c start

问题 Using ProcessBuilder , I've been trying to create an independent process that doesn't get terminated when the JVM gets terminated, but nothing seems to work. I've tried /usr/bin/nohup commands , but that still seems to terminate when the JVM that launched it is terminated. Is there any way to accomplish this in Java? 回答1: Well, first things first lets write a test script that validates what you're seeing: $ cat /tmp/test.sh #!/bin/bash for sig in SIGINT SIGTERM SIGHUP; do trap "echo Caught