我关于密码的第一个循环不起作用

Question

问题：由于某种原因，循环 while (!input.equalsIgnoreCase(passWord))不起作用。即使密码不正确，执行也会直接进入另一个循环。如果有人可以帮助我，我将不胜感激。提前致谢。public static void main(String[] args) {    final int MAX_PLAYERS = 15 ;    final int MIN_PLAYERS = 9 ;    int players ;    int teamSize ;    int teams ;    int leftOver ;    String input ;    String passWord = "PROSPERO" ;    input = JOptionPane.showInputDialog(" What is the password please ?");    passWord = String.valueOf(input);    while (!input.equalsIgnoreCase(passWord))    {        input = JOptionPane.showInputDialog(" What is the password please ?");        passWord = String.valueOf(input);    }    input = JOptionPane.showInputDialog("Enter the number of players per team :");    teamSize = Integer.parseInt(input) ;    while (teamSize < MIN_PLAYERS || teamSize > MAX_PLAYERS)    {        input = JOptionPane.showInputDialog("Sorry the minimum player" +                " should be at least" + MIN_PLAYERS + " a maximum of " + MAX_PLAYERS) ;        teamSize = Integer.parseInt(input) ;    }    input = JOptionPane.showInputDialog(" Enter the number of players :") ;    players = Integer.parseInt(input) ;    while ( players < 0 )    {        input = JOptionPane.showInputDialog(" Sorry the numbers of players should be greater than 0 . "                + " Enter again a number : " ) ;        players = Integer.parseInt(input) ;    }    teams = players / teamSize ;    leftOver = players % teamSize ;    JOptionPane.showMessageDialog(null, " There will be " + teams +            "teams" + leftOver + " players leftover" + passWord);}

Answer 1

问题就在这里，所以你输入的密码等于密码。

input = JOptionPane.showInputDialog(" What is the password please ?");

passWord = String.valueOf(input);

你需要像这样修改它：

input = JOptionPane.showInputDialog(" What is the password please ?");

String inputPassWord = String.valueOf(input);

while (!inputPassWord.equalsIgnoreCase(passWord))

{

    input = JOptionPane.showInputDialog(" What is the password please ?");

    inputPassWord = String.valueOf(input);

}

Answer 2

您正在使用password包含实际密码的相同变量。下面的逻辑应该可以解决你的问题，

String passWord = "PROSPERO" ;

String inputPassword="";

inputPassword = JOptionPane.showInputDialog(" What is the password please ?");

while (!inputPassword.equalsIgnoreCase(passWord)) {

      inputPassword = JOptionPane.showInputDialog(" What is the password please ?");

}