谁能帮我理解为什么程序要求我在继续之前输入我的选择两次？
public static void main(String[] args) {
String quit = "quit";
String input = "input";
String print = "print";
@SuppressWarnings("resource")
Scanner scan = new Scanner(System.in);
System.out.println("please enter a command : \n 1) Quit \n 2) Input \n 3) Print \n");
String initialSelection = scan.next();
boolean stringInput = scan.hasNext();
boolean intInput = scan.hasNextInt();
boolean boolinput = scan.hasNextBoolean();
if(initialSelection.equalsIgnoreCase(quit)) {
System.out.println("The program has quit.");
System.exit(0);
}else if(initialSelection.equalsIgnoreCase(print)){
[constructor]
do {
System.out.println("\nplease enter a command : \n 1) Quit \n 2) Input \n 3) Print \n");
initialSelection = scan.nextLine();
if (initialSelection.equalsIgnoreCase(print)) {
new BonusArrayList();
} else if(initialSelection.equalsIgnoreCase(quit)) {
System.out.println("The program has quit.");
System.exit(0);
}
} while (initialSelection.equalsIgnoreCase(print));
}else if(initialSelection.equalsIgnoreCase(input)){
System.out.println("\n Please enter some kind of value (ex: 123, hello, True)");
}
}
我相信它来自嵌套的 do-while 语句，但我似乎无法解决这个问题。任何提示将不胜感激！