Demo.java
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import java.net.*;
public class Demo {
public static void main(String args[]) {
if (args.length != 1) {
System.err.println ("Syntax - Demo host");
System.exit(0);
}
System.out.println ("Resolving " + args[0]);
try {
InetAddress addr = InetAddress.getByName(args[0]);
System.out.println ("IP address : " + addr.getHostAddress() );
System.out.println ("Hostname : " + addr.getHostName());
} catch (UnknownHostException e) {
System.out.println ("Error - unable to resolve hostname" );
}
}
}
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