Java代码不允许我将一个方法从一个类调用到另一个类

Question

抱歉，这是一个很长的问题，但我无法使用pm将printPASSInfo（）调用到另一个类。printPASSInfo（）。pm是我试图调用的方法所在的类的名称。我可以把这个方法称为pm。打印信息很好，我不明白出了什么问题。很抱歉，这可能会让人困惑，而且很长，但请尝试帮助。谢谢大家！这是我的密码：

import java.util.Scanner; 

public class Prog1Methods_FA11 {
    String ssn, pw, phoneNumber,line;
    Scanner input = new Scanner (System.in);
    boolean validPW_Length = true, 
            validPW_Symbols = true, 
            validPW_enough_Digits = true;
    boolean validSSN_Digits = true, 
            validSSN_Format = true, 
            validSSN_Length = true;
    boolean validPhone_Symbols = true, 
            validPhone_Format = true, 
            validPhone_Length = true;

    public Prog1Methods_FA11() {

    }


    // you may insert a method here to display password status
    public void printPASSInfo(){
        System.out.println("\t Password Information");
        System.out.println("The Password:\t" + pw);
        System.out.println("Password Lrngth:\t" + validPW_Length);
        System.out.println("Password has minimum number of digits:\t" + validPW_enough_Digits);
        System.out.println("Password has correct symbols:\t" + validPW_Symbols);
    }

    // you may insert a method here to display the phone number status

}

以下是我试图称之为：

case 2:     System.out.println("Enter a password witha atleast 8 characters and atleast 2 numbers:\t");
                        pw = input.nextLine();
                        pm.readAndVerifyPASS(pw);
                        pm.printPASSInfo();
                        break;

还有滑稽的错误：

MySkeletonProgram1_FA11.java:53: cannot find symbol
symbol  : method printPASSInfo()
location: class Prog1Methods_FA11
                            pm.printPASSInfo();
                                                          ^
1 error

我声明pm对象：

public class MySkeletonProgram1_FA11{
  public static void main(String[] args)throws Exception {

// Declarations

Scanner scan = new Scanner(System.in);
Scanner input = new Scanner (System.in);
Prog1Methods_FA11 pm = new Prog1Methods_FA11();

Answer 1

对于您粘贴的类，这可以很好地编译和运行：

public static void main(String[] args) {
    Prog1Methods_FA11 pm = new Prog1Methods_FA11();
    String pw = "foo";
    pm.readAndVerifyPASS(pw);
    pm.printPASSInfo();
}

试试看，把你遇到的错误都贴出来