how to redirect stdin to java Runtime.exec?

how to redirect stdin to java Runtime.exec?

By : pigtech
Date : November 19 2020, 07:01 PM
I wish this helpful for you Exec returns a Process object to you.
Process has getInputStream and getOutputStream methods.
code :

Share : facebook icon twitter icon
Can Java Runtime.exec another java program that uses stdin?

Can Java Runtime.exec another java program that uses stdin?

By : Paktolus Solutions
Date : March 29 2020, 07:55 AM
seems to work fine Call the method Process.getOutputStream and feed your input to the returned output stream.
api docs:
code :
public abstract OutputStream getOutputStream()
fork/exec: child exits when trying to redirect stdin/stdout

fork/exec: child exits when trying to redirect stdin/stdout

By : user3499923
Date : March 29 2020, 07:55 AM
wish of those help Probably the problem is in the call to execlp().
Although technically the list of arguments may be empty, it is standard practice to add always at least one argument, that will be argv[0] in main(), with the actual name used to invoke the program. Likely the python program uses this arg0 as argument to Py_SetProgramName() without checking for NULL.
code :
execlp("child_process", "child_process", (char*)NULL);
Java Runtime exec Redirect On Windows

Java Runtime exec Redirect On Windows

By : Sein
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I want to execute this command on windows, but It seems Java exec is not working with the redirect. How can I solve this problem?
code :
    String [] command = {"cmd" , "/C" ,cmd + " >" + finalPath};
    Process p = Runtime.getRuntime().exec(command);
C: Redirect stdin to external program via exec

C: Redirect stdin to external program via exec

By : user3505031
Date : March 29 2020, 07:55 AM
I hope this helps . You might want to modify the way you deliver the data, so that it will work for programs that are working in blocks, and expect EOF indicator.
The main should close the downstream, once it deliver the data. This will allow many programs that work in buffered mode to process the input, even when it's not completed lines. Also should checks for error/EOF on data coming from the child, and handle the output of large blocks.
code :

    // send second argument to pipe
    write(downstream[1], argv[1], strlen(argv[1]));
    close(downstream[1]) ;

    // read result from pipe
    char buffer[100];
    int nread ;
    // Lop until EOF or error.
    while ( (nread=read(upstream[0], buffer, sizeof(buffer)-1) > 0 ) {
        buffer[nread] = 0 ;       // NUL terminator.
        printf("OUTPUT: %s", buffer);
    } ;

Jython naming conflict: java.lang.Runtime.exec and python's exec

Jython naming conflict: java.lang.Runtime.exec and python's exec

By : user4101242
Date : March 29 2020, 07:55 AM
should help you out I am translating some java code into Jython and there is a point where I need to call java.lang.Runtime. The code in Java reads:
Related Posts Related Posts :
  • doubt on private members and Methods
  • How do I check if output stream of a socket is closed?
  • Is there a clean cut way of adding NOP records to an AFP file using Java?
  • Move multiple BufferedImage in Java2D?
  • how to learn Drools or another rule engine fast
  • Date Sorting - Latest to Oldest
  • unable to add objects to saved collection in GAE using JDO
  • Spring, Hibernate, Blob lazy loading
  • Including Applet in JSP page
  • Original object is also changed when values of cloned object are changed
  • Drag and drop + custom drawing in Android
  • Creating a time series with jfreechart
  • Hibernate Criteria: Perform JOIN in Subquery/DetachedCriteria
  • How to check if my string is equal to null?
  • Connect two client sockets
  • How to reference a .dll from a .jar file
  • Invoke web-services in JSF
  • servlet connection to DB
  • Can I un-assign (clear) all fields of an instance?
  • Java parsing XML document gives "Content not allowed in prolog." error
  • Deploy Play! application as executable jar
  • Castor: how to map a simple list of strings?
  • Hibernate Transient Extends problem
  • Posting a JSON array to webservice in Android
  • How to search for duplicate values in a huge text file having around Half Million records
  • Easy way to get a test file into JUnit
  • cast across classloader?
  • Image manipulation
  • Java - JPA - Generators - @SequenceGenerator
  • What's a good Java-based Master-Slave communication mechanism?
  • Design Help/Suggestion required
  • NullPointerException in com.sun.tools.jxc.SchemaGenTask
  • time required to finish the multithreaded program?
  • Traditional IO vs memory-mapped
  • Using StringBuilder to process csv files to save heap space
  • Response Time is different for mulitiple execution of the application with the same request Performance problem
  • Java - Weblogic - JMX : request available free memory on all servers
  • Error: Can't find common super class of
  • JNI problem when calling a native library that loads another native library
  • calling Stanford POS Tagger maxentTagger from java program
  • Notification framework for java
  • hide keyboard in android?
  • Alternative of JPA
  • How to get Java XP Look and Feel
  • Remote JMS connection still using localhost
  • Java NoClassDefFoundError
  • Is O(N!*N) an acceptable big oh complexity class or do I remove the constant and just say O(N!)?
  • Java File URI error?
  • Using an interface as a constructor parameter in Java?
  • Add additional path to exec-maven-plugin
  • Natural Language parsing of an appointment?
  • Java: How to tell which fontconfig file my system is currently using?
  • How to create notification icon badge on Android apps (like iPhone)
  • Interfaces with hibernate annotations
  • Getting ConnectionTimeoutException with the host did not accept the connection within timeout
  • How to get all property names of a Groovy class?
  • Java Netscape LDAP Remove One Attribute
  • A simple two column layout with Swing
  • Making a Linked list using Generics
  • how to handle result set data
  • shadow
    Privacy Policy - Terms - Contact Us © 35dp-dentalpractice.co.uk