how do you restart a java program

by Prof. Chanelle Satterfield DVM Published 3 years ago Updated 2 years ago

Basically it does the following:

Find the java executable (I used the java binary here, but that depends on your requirements)
Find the application (a jar in my case, using the MyClassInTheJar class to find the jar location itself)
Build a command to restart the jar (using the java binary in this case)
Execute it! (and thus terminating the current application and starting it again)

How can I restart a Java application? Strictly speaking, a Java program cannot restart itself since to do so it must kill the JVM in which it is running and then start it again, but once the JVM is no longer running (killed) then no action can be taken.

Full Answer

How to run Java program automatically on Tomcat startup?

To run java program automatically on tomcat startup, need to use Servlet and this Servlet initialized on tomcat startup automatically. To execute a program, you have to use Servlet and Servlet should define in deployment descriptor web.xml file under WEB-INF folder. Graysen.

Can you execute a program without main method in Java?

You can try this way also! Yes, it is possible to run a java program without main () method by using a static block. And the reason that we can execute a program without main () method. Because static block is executed before loading the main () method. There is a limitation to this concept of using static block.

How to run a Java program from the command prompt?

Method 1 Method 1 of 2: Compiling and Running

Save the program. After using a text editor, such as NotePad, to create your Java program, save the program with a .java extension.
Open Command Prompt/Terminal. Accessing the command line differs slightly for Mac and Windows. ...
Check that Java is installed. ...
Navigate to the correct folder. ...
Compile the program. ...
Run the program. ...

How to start a project with Java?

Launch IntelliJ IDEA. If the Welcome screen opens, click New Project. ...
From the list on the left, select the framework that you want to use in your application.
If suggested, configure the project SDK. To develop Java-based applications, you need a JDK (Java Development Kit). ...
Other options differ depending on the framework that you have selected. ...

See more

How do you restart a Java process?

Select Start -> Settings -> Control Panel -> Administrative Services. When the Administrative Services dialog box is displayed, double-click the Services icon to open the Services dialog box. Select Identity Synchronization for Windows and then select Action -> Start (or Stop) from the menu bar.

How do you rerun a program in Java?

Type 'javac MyFirstJavaProgram. java' and press enter to compile your code. If there are no errors in your code, the command prompt will take you to the next line (Assumption: The path variable is set). Now, type ' java MyFirstJavaProgram ' to run your program.

How do you start code in Java?

Steps to Compile and Run first Java programDeclare a class with name A.Declare the main method public static void main(String args[]){Now Type the System. out. println(“Hello World”); which will print Hello World in Java.

How do you force quit Java?

You can use exit() method of System class to end java program. System. exit() causes Java virtual machine to exit and terminate the current process. You can call System.

Is there a repeat command in Java?

String Class repeat() Method in Java with Examples The string can be repeated N number of times, and we can generate a new string that has repetitions. repeat() method is used to return String whose value is the concatenation of given String repeated count times.

What does \r do in Java?

'\r' is the representation of the special character CR (carriage return), it moves the cursor to the beginning of the line. '\n'(line feed) moves the cursor to the next line . On windows both are combined as \r\n to indicate an end of line (ie, move the cursor to the beginning of the next line).

How do you start off code?

How to Start CodingFigure out why you want to learn to code.Choose which coding language you want to learn first.Take online courses.Watch video tutorials.Read books and ebooks.Use tools that make learning to code easier.Check out how other people code.Complete coding projects.More items...•

What does the Start () do?

The purpose of start() is to create a separate call stack for the thread. A separate call stack is created by it, and then run() is called by JVM.

What is start point in Java?

The "starting point" of a Java desktop application is the main method of its main class in the sense that it is the first thing written by you invoked by the runtime environment, by the JVM. A Web application has not one single "starting point" in this sense.

How do you exit an unresponsive program?

You can also use Task Manager to force quit applications that are unresponsive.Launch Task Manager by right-clicking the Taskbar and selecting Task Manager.Browse the list of running apps and locate the app that isn't responding.Right-click the unresponsive app > choose End Task. This will force shut the application.

How do I shutdown a program that is frozen?

Try Closing With Alt + F4 First A basic troubleshooting step when programs freeze up is pressing Alt + F4. This is the Windows keyboard shortcut for closing the current process, equivalent to clicking the X icon in the upper-right corner of a window.

What does system Exit 0 do in Java?

exit(0) : Generally used to indicate successful termination. exit(1) or exit(-1) or any other non-zero value – Generally indicates unsuccessful termination. Note : This method does not return any value.

How do you repeat in program?

To repeat the same coding or programming number of times, better write this code as function or write the code in conditional and in unconditional looping....In C, given block of code, one can wrap in it in an "while" loop:while (condition){ }

How do I rerun a program in eclipse?

You can restart running application by right clicking it in debug window and selecting "Terminate and relaunch". If you really want you can also add custom shortcut for terminating and relaunching by Window -> Preferences -> General -> Keys -> Find "Terminate and Relaunch" and choose your favorite key combination!

How do I rerun a project in Eclipse?

To restart eclipse, click on the File menu and select the Restart menu item.

Is there a repeat until loop in Java?

The basic syntax for a repeat / until loop looks like this: repeat DoSomething(); DoSomethingElse(); until x ≥ 10; where a conditional expression is specified after the closing until keyword, and a list of statements can be provided between the repeat and until keywords.

Does Java include command line options?

Typically, not all command-line options to the 'java' command are passed to the Java virtual machine. Thus, the returned input arguments may not include all command-line options.

Can Java restart itself?

13. Strictly speaking, a Java program cannot restart itself since to do so it must kill the JVM in which it is running and then start it again, but once the JVM is no longer running (killed) then no action can be taken.

Does Awt need restart?

The AWT app should exit the JVM with something other than the RESTART_CODE on "normal" termination which doesn't require restart.

Can Java read /proc/self/cmdline?

If you are running in an environment which provides procfs and therefore has the /proc file system available (which means this is not a portable solution ), you can have Java read /proc/self/cmdline in order to restart itself, like this:

Knowledge Builders