Running Bash commands in Java

Question

I have the following class. It allows me to execute commands through java.

public class ExecuteShellCommand {

public String executeCommand(String command) {         


        

Answer 1

You could use the bash command "pmset -g batt" like in the method bellow witch returns the battery percentage

public int getPercentage() {
    Process process = null;
    try {
        process = Runtime.getRuntime().exec("pmset -g batt");
    } catch (IOException e) {
        e.printStackTrace();
    }
    BufferedReader reader = new BufferedReader(new InputStreamReader(
            process.getInputStream()));
    String s = null;
    String y = "";
    while (true) {
        try {
            if (!((s = reader.readLine()) != null)) break;
        } catch (IOException e) {
            e.printStackTrace();
        }
        y += s;
        System.out.println("Script output: " + s);
    }
    return Integer.parseInt(y.substring(y.indexOf(')') + 2, y.indexOf('%')));
}