How to Pass Parameters to Executables When Calling Them from Java?

Invoking Executables with Parameters from Java

Calling executables from Java offers a convenient approach for integrating external programs into Java applications. However, passing parameters to these executables can be a common hurdle. Let's explore how to effectively achieve this in Java programming.

The code snippet provided demonstrates the use of the ProcessBuilder class to launch an executable. While it successfully captures the output of the executable, it lacks the ability to pass parameters. To address this, modify the code as follows:

<code class="java">Process process = new ProcessBuilder("C:\PathToExe\MyExe.exe", "param1", "param2").start();</code>

In this modified code, the parameters are specified as arguments to the ProcessBuilder constructor. The first argument remains the path to the executable, while subsequent arguments represent the parameters to be passed.

Another challenge arises when dealing with paths containing blank spaces. To overcome this, enclose the path in quotation marks within the constructor, as shown below:

<code class="java">Process process = new ProcessBuilder("C:\User\\"My applications\"\MyExe.exe").start();</code>

By encasing the path with quotation marks, the system interprets it as a single string, regardless of the embedded spaces. This approach ensures that the executable is located and invoked correctly.

In summary, passing parameters to executables from Java involves specifying them as arguments to the ProcessBuilder constructor. Additionally, for paths containing blank spaces, enclosing them in quotation marks within the constructor is essential for successful execution.

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