如何将用户输入变量传入构造函数？

Question

我只需要这个程序的一些帮助。 用户必须输入ID，密码，最大尝试次数&最大使用次数。 他们必须进入构造函数... 有人可以帮我把它们传递给构造函数吗？ 我正在使用java。 谢谢！

import java.util.Scanner; 
public class LoginPw{ 


public static void main(String[] args){ 
    // TODO Auto-generated method stub 
    Scanner reader = new Scanner(System.in); 
    System.out.println("Enter in your id and password"); 
    int idnum = reader.nextInt(); 
    int password = reader.nextInt(); 
    System.out.println("Enter in the max number of tries"); 
    int maxtries = reader.nextInt(); 
    System.out.println("Enter in the number of max uses"); 
    int maxuses = reader.nextInt(); 
    PwLogin pwl = new PwLogin(idnum,password,maxtries,maxuses); 

}} 
class PwLogin{ 

    public PwLogin(int id, int pw){ 
    //assumes max num of tries is infinite. denote by value of 0. 
    this(id,pw,0,0); //call the 4-argument constructor w/ maxTries & maxUses defaulted as zero(infinite) 
    } 
    public PwLogin(int id, int pw, int tries){ 
    //assumes max number of uses is infinite. denote by value of 0. 
    this(id, pw, tries,0); //Call the 4-argument constructor with maxUses defaulted as zero (infinite) 
    } 
    public PwLogin(int id, int pw, int tries, int uses){ 
    // Now set the 4 class variables from the passed-in arguments 
    this.idnum =id; 
    this.password = pw; 
    this.maxtries=tries; 
    this.maxuses=uses; 

    } 

} 

Answer 1

您需要在Java中声明成员变量：

class PwLogin{ 

    private int idnum; 
    private int password; 
    private int maxtries; 
    private int maxuses; 

    public PwLogin(int id, int pw){ 
     etc...