java让用户输入密码且保证不超过8位
时间: 2023-08-22 15:03:25 浏览: 54
可以使用Java的Scanner类来实现用户输入密码,然后通过检查密码长度来保证它不超过8位。下面是实现代码的示例:
```java
import java.util.Scanner;
public class PasswordInput {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Please enter your password (no more than 8 characters): ");
String password = scanner.nextLine();
while (password.length() > 8) {
System.out.println("The password you entered is too long. Please try again.");
System.out.print("Please enter your password (no more than 8 characters): ");
password = scanner.nextLine();
}
System.out.println("Your password is: " + password);
}
}
```
这段代码会提示用户输入密码,如果密码长度超过8位,则会要求用户重新输入。如果密码长度不超过8位,则会输出用户输入的密码。