01——java IO流

public class GameHelper {
public String getUserInput(String prompt) {
String inputLine = null;
System.out.print(prompt + " ");
try {
BufferedReader is = new BufferedReader(new InputStreamReader(System.in));
inputLine = is.readLine();
if(inputLine.length() == 0) {
return null;
}
}catch (IOException e) {
System.out.println("IOException: " + e);
}
return inputLine;
}
}