Execute External Programs with Java Runtime.exec() - Learn How

Java is a versatile programming language that allows developers to execute external programs using the Runtime.exec() method. This method is used to start a new process and run a command in that process.

To use Runtime.exec(), you need to provide the command to be executed as a string. This command can be any executable file or batch script that can be run in a command-line environment. You can also specify command-line arguments to pass to the program.

For example, to execute the Windows command ipconfig, you can use the following code:

try {
    Process process = Runtime.getRuntime().exec("cmd /c ipconfig");
} catch (IOException e) {
    e.printStackTrace();
}

This code creates a new Process object and runs the command ipconfig using the Windows command prompt (cmd /c). The output of the command can be read using the InputStream and BufferedReader classes.

It's important to note that the Runtime.exec() method can throw an IOException if the command fails to execute. To handle this, you should always use a try-catch block to handle any exceptions.

In conclusion, the Runtime.exec() method in Java provides a powerful way to execute external programs and scripts from your Java application. By using this method, you can automate tasks and interact with command-line programs easily.

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