java.util.scanner - How do I close a scanner in java? -

when ever run following code,

private static string input(string message){     scanner input_scanner = new scanner(system.in);     system.out.print("\n" + message);     string string = input_scanner.nextline();     input_scanner.close();     return string; } 

i error:

exception in thread "main" java.util.nosuchelementexception: no line found     @ java.util.scanner.nextline(unknown source)     @ main.learn.input(learn.java:25)     @ main.learn.main(learn.java:13) 

i figured out line input_scanner.close(); when remove it, warnings saying:

resource leak: "input_scanner" never closed"

is there anyway can stop errors happening , rid of warnings?

you should check if have data consume scanner using hasnextline api like:

string string = ""; if (input_scanner.hasnextline()) {     string = input_scanner.nextline(); }