Input system variables and run parameters in eclipse

At development time, it may be necessary to set different system parameters depending on the environment, and we all know that we can use the-d parameter to set runtime system variables when using the Java-jar command, and how do we set the system variable when running Java programs in eclipse?

In addition, if our program needs to enter a running parameter, how is it configured in eclipse?

The answer is simple, as follows:

Right-click Run As-->run configurations on the class you want to run ...

In the pop-up screen, click Arguments

Then the following screen appears:

1. In the Program arguments column, you can enter the parameters required for the application to run, that is, the parameters of the main method, if the parameters are multiple, separated by a space.

2.VM arguments receives the system variable parameter, the system variable input format is:-dargname=argvalue, similarly, the multiple parameters are separated by a space. In addition, if there are spaces in the middle of the parameter values, enclose them in quotation marks

The sample program code is as follows:

1. /*** Classname:main <br/> * function:eclipse System variables and operating parameters. <br/> * date:2013-8-27 pm 04:06:09 <br/> *  * @author[email protected] *@version   */   Public classMain { Public Static voidMain (string[] args) {System.out.println ("Print all the parameters:"); if(args.length>0){               for(inti=0;i<args.length;i++) {System.out.println (The "+i+" parameter is: "+Args[i]); }} System.out.println ("Print system variable:"); String Env= System.getproperty ("service.env"); System.out.println ("Service.env:" +env); String LogPath= System.getproperty ("Logfile.path"); System.out.println ("Logfile.path:" +LogPath); }  }  

To run the program, the console output is as follows:

1. Print all the parameters:
2. The first 0 parameters are: Chenzhou
3. the first 1 parameters are: CHENZHOU2
4. the first 2 parameters are: Chenzhou3
5. Print System Variables:
6. Service.env:DEV
7. Logfile.path:e:\u03\project\logs

Input system variables and run parameters in eclipse