How to lock , shutdown , restart and suspend the pc with runtime.exec in java ?

[ghost]

How to lock , shutdown , restart and suspend the pc with runtime.exec in java ?

I want to make a jar for windows and linux os.

I want to lock , shutdown , restart and suspend the pc programmatically.

I tried this code.

package poweroff;

import mousekeyboardcontrol.MouseKeyboardControl;

public class PowerOff {
String os;
Runtime runtime;
public PowerOff() {
    os = System.getProperty("os.name");
    runtime = Runtime.getRuntime();
}

public void shutdown() {     
    try {
        if ("Windows 8.1".equals(os) || "Windows 8.0".equals(os) || "Windows 10".equals(os)) {
            runtime.exec("shutdown -s");
        } else {
            System.out.println("Unsupported operating system");
        }
    } catch(Exception e) {
        System.out.println("shutdown error");
        e.printStackTrace();
    }

}

public void restart() {     
    try {
        if ("Windows 8.1".equals(os) || "Windows 8.0".equals(os) || "Windows 10".equals(os)) {
            runtime.exec("shutdown -r");
        } else {
            System.out.println("Unsupported operating system");
        }
    } catch(Exception e) {
        System.out.println("restart error");
        e.printStackTrace();
    }

}

public void suspend() {     
    try {
        if ("Windows 8.1".equals(os) || "Windows 8.0".equals(os) || "Windows 10".equals(os)) {
            runtime.exec("Rundll32.exe powrprof.dll,SetSuspendState Sleep");
        } else {
            System.out.println("Unsupported operating system");
        }
    } catch(Exception e) {
        System.out.println("suspend error");
        e.printStackTrace();
    }   
}

public void lock() {     
    try {
        if ("Linux".equals(os) || "Mac OS X".equals(os)) {
            new MouseKeyboardControl().ctrlAltL();
        } else if ("Windows 8.1".equals(os) || "Windows 8.0".equals(os) || "Windows 10".equals(os)) {
            runtime.exec("Rundll32.exe user32.dll,LockWorkStation");
        } else {
            System.out.println("Unsupported operating system");
        }
    } catch(Exception e) {
        System.out.println("pc lock error");
        e.printStackTrace();
    }

}

public static void main(String args[]) {
    PowerOff powerOff = new PowerOff();
    powerOff.lock();
}
}

But , it not worked.

I want to lock , shutdown , restart and suspend with programmatically in java for windows 7 , 8 ,10 and all linux os.

How Can I solve this?

[varunon9]

You can check Operating System first and based on that you can issue command. I no longer support this project but StackOverflow will definitely help you :)

[ghost]

How can you do this code?

Can you give any information ?