[英]Java. The method isOpen() is undefined for the type Lock. Also need some help fixing some code/debugging
import java.io.*;
public class GentCPT3
{
public static void main (String[] args) throws IOException
{
BufferedReader objReader = new BufferedReader(new InputStreamReader (System.in));
System.out.println("Enter key");
int key1 = Integer.parseInt(objReader.readLine()); // set to 111
System.out.println("Enter key2");
int key2 = Integer.parseInt(objReader.readLine()); // set to 222
Lock lock1 = new Lock (key1);
Lock lock2 = new Lock (key2);
System.out.println(lock1.isOpen()); // prints false
lock1.close();
lock2.close();
lock1.open(111); // opens lock1
lock2.open(222); // opens lock2111
lock1.open(123); // fails to open
lock1.open(456); // fails to open
lock1.open(789); // fails - prints “Alarm”
}
}
class Lock //Initializing class
{
//Initializing variables
boolean isOpen;
int key;
int numAttempts = 0;
Lock(int key)
{
isOpen = false;
this.key = key;
}
public void close()//for incorrect combo
{
isOpen = false;
}
public void open(int key)//for correct combo
{
if(this.key == key)
{
isOpen = true;
}
else if(this.key != key && !isOpen)
{
numAttempts++;
}
if(numAttempts == 3)
{
System.out.println("ALARM");//prints alarm when the combo is incorrect **enter code here**3 times
}
}
}
我需要幫助修復標題中提到的錯誤。 還有一些我需要幫助的其他調試事項。 如果您認為可以修復它,請隨時編輯代碼。 我需要幫助將鎖上每個組合的嘗試次數設置為 3,因為現在它設置為 2,我不知道為什么
問題是一旦成功打開鎖,您就不會關閉它們。 將您的電話更改為:-
lock1.close();
lock2.close();
lock1.open(111); // opens lock1
lock2.open(222); // opens lock2111
lock1.close(); // NEW ADDITION
lock2.close(); // NEW ADDITION
lock1.open(123); // fails to open
lock1.open(456); // fails to open
lock1.open(789); // fails - prints “Alarm”
為了進一步改進代碼,當this.key == key
時在open()
重置numAttempts = 0
。 並刪除this.key != key
因為由於先前的if
條件,它始終為true
。
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