Java. The method isOpen() is undefined for the type Lock. Also need some help fixing some code/debugging
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1
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
}
}
}
I need help fixing the error mentioned in the title. Also a few other debugging things I need help with. feel free to edit the code if you think you can fix it. I need help setting the attempts for each combonation on the lock to 3 because as of right now its set to 2 and I don't know why
java
asked Nov 21 '18 at 23:22
Joshua GentileJoshua Gentile
54
|
show 1 more comment
1
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
}
}
}
I need help fixing the error mentioned in the title. Also a few other debugging things I need help with. feel free to edit the code if you think you can fix it. I need help setting the attempts for each combonation on the lock to 3 because as of right now its set to 2 and I don't know why
java
asked Nov 21 '18 at 23:22
Joshua GentileJoshua Gentile
54
2
You don’t have a method namedisOpen, just a field.
– Logan
Nov 21 '18 at 23:23
1
remove parenthesis inlock1.isOpen()?
– Kartik
Nov 21 '18 at 23:28
I tried that and I don't get any errors, however my program doesn't function the way I want it to. I just need some 1 on 1 help tbh
– Joshua Gentile
Nov 21 '18 at 23:29
1
Also, for good design, you should make your class fields in Lock private and write getter and setter methods for them for other classes to use.
– Grant Foster
Nov 21 '18 at 23:29
2
@JoshuaGentile you can get 100 on 1 help here; all you have to do is update your question with specific issues you are having; explain them to the best of your ability
– Kartik
Nov 21 '18 at 23:31
|
show 1 more comment
1
1
1
0
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
}
}
}
I need help fixing the error mentioned in the title. Also a few other debugging things I need help with. feel free to edit the code if you think you can fix it. I need help setting the attempts for each combonation on the lock to 3 because as of right now its set to 2 and I don't know why
java
asked Nov 21 '18 at 23:22
Joshua GentileJoshua Gentile
54
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
}
}
}
I need help fixing the error mentioned in the title. Also a few other debugging things I need help with. feel free to edit the code if you think you can fix it. I need help setting the attempts for each combonation on the lock to 3 because as of right now its set to 2 and I don't know why
java
java
asked Nov 21 '18 at 23:22
Joshua GentileJoshua Gentile
54
asked Nov 21 '18 at 23:22
Joshua GentileJoshua Gentile
54
edited Nov 21 '18 at 23:34
Joshua Gentile
asked Nov 21 '18 at 23:22
Joshua GentileJoshua Gentile
54
asked Nov 21 '18 at 23:22
Joshua GentileJoshua Gentile
54
asked Nov 21 '18 at 23:22
Joshua GentileJoshua Gentile
54
54
2
You don’t have a method namedisOpen, just a field.
– Logan
Nov 21 '18 at 23:23
1
remove parenthesis inlock1.isOpen()?
– Kartik
Nov 21 '18 at 23:28
I tried that and I don't get any errors, however my program doesn't function the way I want it to. I just need some 1 on 1 help tbh
– Joshua Gentile
Nov 21 '18 at 23:29
1
Also, for good design, you should make your class fields in Lock private and write getter and setter methods for them for other classes to use.
– Grant Foster
Nov 21 '18 at 23:29
2
@JoshuaGentile you can get 100 on 1 help here; all you have to do is update your question with specific issues you are having; explain them to the best of your ability
– Kartik
Nov 21 '18 at 23:31
|
show 1 more comment
2
You don’t have a method namedisOpen, just a field.
– Logan
Nov 21 '18 at 23:23
1
remove parenthesis inlock1.isOpen()?
– Kartik
Nov 21 '18 at 23:28
I tried that and I don't get any errors, however my program doesn't function the way I want it to. I just need some 1 on 1 help tbh
– Joshua Gentile
Nov 21 '18 at 23:29
1
Also, for good design, you should make your class fields in Lock private and write getter and setter methods for them for other classes to use.
– Grant Foster
Nov 21 '18 at 23:29
2
@JoshuaGentile you can get 100 on 1 help here; all you have to do is update your question with specific issues you are having; explain them to the best of your ability
– Kartik
Nov 21 '18 at 23:31
2
2
You don’t have a method named
isOpen, just a field.– Logan
Nov 21 '18 at 23:23
You don’t have a method named
isOpen, just a field.– Logan
Nov 21 '18 at 23:23
1
1
remove parenthesis in
lock1.isOpen()?– Kartik
Nov 21 '18 at 23:28
remove parenthesis in
lock1.isOpen()?– Kartik
Nov 21 '18 at 23:28
I tried that and I don't get any errors, however my program doesn't function the way I want it to. I just need some 1 on 1 help tbh
– Joshua Gentile
Nov 21 '18 at 23:29
I tried that and I don't get any errors, however my program doesn't function the way I want it to. I just need some 1 on 1 help tbh
– Joshua Gentile
Nov 21 '18 at 23:29
1
1
Also, for good design, you should make your class fields in Lock private and write getter and setter methods for them for other classes to use.
– Grant Foster
Nov 21 '18 at 23:29
Also, for good design, you should make your class fields in Lock private and write getter and setter methods for them for other classes to use.
– Grant Foster
Nov 21 '18 at 23:29
2
2
@JoshuaGentile you can get 100 on 1 help here; all you have to do is update your question with specific issues you are having; explain them to the best of your ability
– Kartik
Nov 21 '18 at 23:31
@JoshuaGentile you can get 100 on 1 help here; all you have to do is update your question with specific issues you are having; explain them to the best of your ability
– Kartik
Nov 21 '18 at 23:31
|
show 1 more comment
1 Answer
1
active
oldest
votes
1
The issue is that you are not closing the locks once you open them successfully. Change your calls to this:-
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”
To further improve the code, reset numAttempts = 0 in your open() when this.key == key. And remove this.key != key because it is always true due to the previous if condition.
answered Nov 21 '18 at 23:49
KartikKartik
4,52231537
so do I remove the parenthesis in isOpen?
– Joshua Gentile
Nov 22 '18 at 0:20
yes, parenthesis are used when you call a method.. butisOpenis a field/variable in your code
– Kartik
Nov 22 '18 at 0:21
so wait, if I remove this.key != key, what do I do with the isOpen in the else if? do I just remove the whole line?
– Joshua Gentile
Nov 22 '18 at 0:25
just leave it there, so it will look likeelse if (!isOpen)
– Kartik
Nov 22 '18 at 0:26
okay, so I compile it without any errors now but when I run the program. when I type in the correct input, it comes up with false and ALARM. I want it to say that the lock is now open and then end the program
– Joshua Gentile
Nov 22 '18 at 0:29
|
show 7 more comments
Your Answer
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1 Answer
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The issue is that you are not closing the locks once you open them successfully. Change your calls to this:-
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”
To further improve the code, reset numAttempts = 0 in your open() when this.key == key. And remove this.key != key because it is always true due to the previous if condition.
answered Nov 21 '18 at 23:49
KartikKartik
4,52231537
so do I remove the parenthesis in isOpen?
– Joshua Gentile
Nov 22 '18 at 0:20
yes, parenthesis are used when you call a method.. butisOpenis a field/variable in your code
– Kartik
Nov 22 '18 at 0:21
so wait, if I remove this.key != key, what do I do with the isOpen in the else if? do I just remove the whole line?
– Joshua Gentile
Nov 22 '18 at 0:25
just leave it there, so it will look likeelse if (!isOpen)
– Kartik
Nov 22 '18 at 0:26
okay, so I compile it without any errors now but when I run the program. when I type in the correct input, it comes up with false and ALARM. I want it to say that the lock is now open and then end the program
– Joshua Gentile
Nov 22 '18 at 0:29
|
show 7 more comments
1
The issue is that you are not closing the locks once you open them successfully. Change your calls to this:-
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”
To further improve the code, reset numAttempts = 0 in your open() when this.key == key. And remove this.key != key because it is always true due to the previous if condition.
answered Nov 21 '18 at 23:49
KartikKartik
4,52231537
so do I remove the parenthesis in isOpen?
– Joshua Gentile
Nov 22 '18 at 0:20
yes, parenthesis are used when you call a method.. butisOpenis a field/variable in your code
– Kartik
Nov 22 '18 at 0:21
so wait, if I remove this.key != key, what do I do with the isOpen in the else if? do I just remove the whole line?
– Joshua Gentile
Nov 22 '18 at 0:25
just leave it there, so it will look likeelse if (!isOpen)
– Kartik
Nov 22 '18 at 0:26
okay, so I compile it without any errors now but when I run the program. when I type in the correct input, it comes up with false and ALARM. I want it to say that the lock is now open and then end the program
– Joshua Gentile
Nov 22 '18 at 0:29
|
show 7 more comments
1
1
1
The issue is that you are not closing the locks once you open them successfully. Change your calls to this:-
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”
To further improve the code, reset numAttempts = 0 in your open() when this.key == key. And remove this.key != key because it is always true due to the previous if condition.
answered Nov 21 '18 at 23:49
KartikKartik
4,52231537
The issue is that you are not closing the locks once you open them successfully. Change your calls to this:-
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”
To further improve the code, reset numAttempts = 0 in your open() when this.key == key. And remove this.key != key because it is always true due to the previous if condition.
answered Nov 21 '18 at 23:49
KartikKartik
4,52231537
answered Nov 21 '18 at 23:49
KartikKartik
4,52231537
answered Nov 21 '18 at 23:49
KartikKartik
4,52231537
answered Nov 21 '18 at 23:49
KartikKartik
4,52231537
4,52231537
so do I remove the parenthesis in isOpen?
– Joshua Gentile
Nov 22 '18 at 0:20
yes, parenthesis are used when you call a method.. butisOpenis a field/variable in your code
– Kartik
Nov 22 '18 at 0:21
so wait, if I remove this.key != key, what do I do with the isOpen in the else if? do I just remove the whole line?
– Joshua Gentile
Nov 22 '18 at 0:25
just leave it there, so it will look likeelse if (!isOpen)
– Kartik
Nov 22 '18 at 0:26
okay, so I compile it without any errors now but when I run the program. when I type in the correct input, it comes up with false and ALARM. I want it to say that the lock is now open and then end the program
– Joshua Gentile
Nov 22 '18 at 0:29
|
show 7 more comments
so do I remove the parenthesis in isOpen?
– Joshua Gentile
Nov 22 '18 at 0:20
yes, parenthesis are used when you call a method.. butisOpenis a field/variable in your code
– Kartik
Nov 22 '18 at 0:21
so wait, if I remove this.key != key, what do I do with the isOpen in the else if? do I just remove the whole line?
– Joshua Gentile
Nov 22 '18 at 0:25
just leave it there, so it will look likeelse if (!isOpen)
– Kartik
Nov 22 '18 at 0:26
okay, so I compile it without any errors now but when I run the program. when I type in the correct input, it comes up with false and ALARM. I want it to say that the lock is now open and then end the program
– Joshua Gentile
Nov 22 '18 at 0:29
so do I remove the parenthesis in isOpen?
– Joshua Gentile
Nov 22 '18 at 0:20
so do I remove the parenthesis in isOpen?
– Joshua Gentile
Nov 22 '18 at 0:20
yes, parenthesis are used when you call a method.. but
isOpen is a field/variable in your code– Kartik
Nov 22 '18 at 0:21
yes, parenthesis are used when you call a method.. but
isOpen is a field/variable in your code– Kartik
Nov 22 '18 at 0:21
so wait, if I remove this.key != key, what do I do with the isOpen in the else if? do I just remove the whole line?
– Joshua Gentile
Nov 22 '18 at 0:25
so wait, if I remove this.key != key, what do I do with the isOpen in the else if? do I just remove the whole line?
– Joshua Gentile
Nov 22 '18 at 0:25
just leave it there, so it will look like
else if (!isOpen)– Kartik
Nov 22 '18 at 0:26
just leave it there, so it will look like
else if (!isOpen)– Kartik
Nov 22 '18 at 0:26
okay, so I compile it without any errors now but when I run the program. when I type in the correct input, it comes up with false and ALARM. I want it to say that the lock is now open and then end the program
– Joshua Gentile
Nov 22 '18 at 0:29
okay, so I compile it without any errors now but when I run the program. when I type in the correct input, it comes up with false and ALARM. I want it to say that the lock is now open and then end the program
– Joshua Gentile
Nov 22 '18 at 0:29
|
show 7 more comments
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2
You don’t have a method named
isOpen, just a field.– Logan
Nov 21 '18 at 23:23
1
remove parenthesis in
lock1.isOpen()?– Kartik
Nov 21 '18 at 23:28
I tried that and I don't get any errors, however my program doesn't function the way I want it to. I just need some 1 on 1 help tbh
– Joshua Gentile
Nov 21 '18 at 23:29
1
Also, for good design, you should make your class fields in Lock private and write getter and setter methods for them for other classes to use.
– Grant Foster
Nov 21 '18 at 23:29
2
@JoshuaGentile you can get 100 on 1 help here; all you have to do is update your question with specific issues you are having; explain them to the best of your ability
– Kartik
Nov 21 '18 at 23:31