How to detect OS in Java – System.getProperty(“os.name”)

Here is a handy Java class that use System.getProperty(“os.name”) to detect which type of operating system (OS) we are using now.

public class OSValidator{
 
	public static void main(String[] args)
	{
		if(isWindows()){
			System.out.println("This is Windows");
		}else if(isMac()){
			System.out.println("This is Mac");
		}else if(isUnix()){
			System.out.println("This is Unix or Linux");
		}else{
			System.out.println("Your OS is not support!!");
		}
	}
 
	public static boolean isWindows(){
 
		String os = System.getProperty("os.name").toLowerCase();
		//windows
	    return (os.indexOf( "win" ) >= 0); 
 
	}
 
	public static boolean isMac(){
 
		String os = System.getProperty("os.name").toLowerCase();
		//Mac
	    return (os.indexOf( "mac" ) >= 0); 
 
	}
 
	public static boolean isUnix(){
 
		String os = System.getProperty("os.name").toLowerCase();
		//linux or unix
	    return (os.indexOf( "nix") >=0 || os.indexOf( "nux") >=0);
 
	}
}