Programming Forums > Application Development > Java

Silvanus · Oct 4th, 2005, 6:16 PM

You probably want to put it in the if statement that checks if again == y.

crawforddavid2006 · Oct 5th, 2005, 6:19 PM

This is the code I used

import cs1.Keyboard;
import java.util.*;

public class HiLo
{
    public static void main (String[] args)
    {
        int play = 1;
        while(play > 0)
        {
        Random generator = new Random();
        int answer = generator.nextInt(100)+1;
        
        System.out.println("The computer is thinking of a number \nbetween 1 and 100. What is it?");
        int escape = 0;
        while(escape < 1)
        {
        int guess = Keyboard.readInt();
        
        if(guess == answer)
        {
            System.out.println("That's it");
            escape = 1;
        }
        else if(guess > answer)
        {
            System.out.println("Too High");
        }
        else if(guess < answer)
        {
            System.out.println("Too Low");
        }
        }
        
        System.out.println("Would you like to play again (y/n)");
        char again = Keyboard.readChar();
        if(again == 'y')
        {
            System.out.print ("\033c");
            play = 1;
        }
        else if(again == 'n')
        {
            play--;
        }
    }
       
    }
}

all it did was print a wierd symbol back where it says "The computer is thinking of a number between 1 and 100."

bl00dninja · Oct 6th, 2005, 2:03 AM

Quote:

The code I gave you is an standard terminal escape code. It should work beautifully on everything *but* Windows.

that's like saying "this should work on every car, except those with gasoline engines".

crawforddavid2006 · Oct 6th, 2005, 6:34 PM

what will work on windows because that is what i'm using

bl00dninja · Oct 7th, 2005, 2:37 AM

we can't compile anything that includes weird-ass files like cs1.keyboard unless we have that file. that's why all of the posts suck. nobody can run this thing. we're all just left here blowing in the wind. since it's an include, how about do a copy-and-paste and show the full source.

crawforddavid2006 · Oct 7th, 2005, 7:41 PM

Try this

Swimmfree200 · Oct 9th, 2005, 10:15 AM

I didnt get too look at what crawford posted but i know that with the JVM you cannot make direct calls to the operating system. This means that the terminal clear code will not work. Also with the skipping lines, this leaves you at the bottom of the screen and most people do not want this. This leaves you really with only one way of doing it. Java has a class which allows you to call "Native classes" meaning classes written in different languages. This means you can write a class in C++ or C that clears the screen and make a call to it in java. Im working on this problem myself right now and am not exactly sure the way to go about it. Here is a link to a class that was already written by someone that will do it for u. http://mimosa.snu.ac.kr/~danke/etc/ClearScreen.zip

I also found another way of doing it using ANSI code but it requires you to alter your config.sys file. This would then make the code machine specific. If you want this code too just let me know.

tempest · Oct 9th, 2005, 10:36 AM

Swimmfree200 , the JVM can write to the screen can't it? Good becase that's all the terminal clear screen code needs.

Thanks for the insight.

[php]
import java.io.*;

public class RunCommand {

public static void main(String args[]) {

String s = null;

Process clear;

try {
clear = Runtime.getRuntime().exec("cls");

BufferedReader stdOut = new BufferedReader(new InputStreamReader(clear.getInputStream()));

while((s = stdOut.readLine()) != null)
System.out.print(s);

System.exit(0);
}
catch (IOException e) {
try {
clear = Runtime.getRuntime().exec("clear");

BufferedReader stdOut = new BufferedReader(new InputStreamReader(clear.getInputStream()));

while((s = stdOut.readLine()) != null)
System.out.print(s);

System.exit(0);
} catch(IOException d) {
System.out.println("Get a real machine:");
d.printStackTrace();
System.exit(-1);
}
}
}
}
[/php]

That program clears the screen or throws an IOException on any windows or unix machine with the commands "cls" or "clear" respectively.

2roll4life7 · Oct 9th, 2005, 11:55 PM

Quote:

Originally Posted by tempest

Swimmfree200 , the JVM can write to the screen can't it? Good becase that's all the terminal clear screen code needs.

Thanks for the insight.

[php]
import java.io.*;

public class RunCommand {

public static void main(String args[]) {

String s = null;

Process clear;

try {
clear = Runtime.getRuntime().exec("cls");

BufferedReader stdOut = new BufferedReader(new InputStreamReader(clear.getInputStream()));

while((s = stdOut.readLine()) != null)
System.out.print(s);

System.exit(0);
}
catch (IOException e) {
try {
clear = Runtime.getRuntime().exec("clear");

BufferedReader stdOut = new BufferedReader(new InputStreamReader(clear.getInputStream()));

while((s = stdOut.readLine()) != null)
System.out.print(s);

System.exit(0);
} catch(IOException d) {
System.out.println("Get a real machine:");
d.printStackTrace();
System.exit(-1);
}
}
}
}
[/php]

That program clears the screen or throws an IOException on any windows or unix machine with the commands "cls" or "clear" respectively.

Not that this has anything to do with the topic but I love it when fellow Java programmers terminate the VM before a useful debugging message can be read. Only exception being if System.setOut(...) or setErr(...) was resigned to something like a text file (which could still be a problem, because the file may not have closed properly).

tempest · Oct 10th, 2005, 9:53 AM

There are two things that can go wrong, you can not have "clear" or not have "cls"... if you can't debug that without debugging information you've got issues as a programmer. Not to mention that this is supposed to be wrong in a terminal, so this code would be useless anywhere else...

Oct 5th, 2005, 6:19 PM	#12
crawforddavid2006 Expert Programmer Join Date: Apr 2005 Location: Not sure yet Posts: 572 Rep Power: 0	This is the code I used (Toggle Plain Text) import cs1.Keyboard; import java.util.; public class HiLo { public static void main (String[] args) { int play = 1; while(play > 0) { Random generator = new Random(); int answer = generator.nextInt(100)+1; System.out.println("The computer is thinking of a number \nbetween 1 and 100. What is it?"); int escape = 0; while(escape < 1) { int guess = Keyboard.readInt(); if(guess == answer) { System.out.println("That's it"); escape = 1; } else if(guess > answer) { System.out.println("Too High"); } else if(guess < answer) { System.out.println("Too Low"); } } System.out.println("Would you like to play again (y/n)"); char again = Keyboard.readChar(); if(again == 'y') { System.out.print ("\033c"); play = 1; } else if(again == 'n') { play--; } } } } import cs1.Keyboard; import java.util.; public class HiLo { public static void main (String[] args) { int play = 1; while(play > 0) { Random generator = new Random(); int answer = generator.nextInt(100)+1; System.out.println("The computer is thinking of a number \nbetween 1 and 100. What is it?"); int escape = 0; while(escape < 1) { int guess = Keyboard.readInt(); if(guess == answer) { System.out.println("That's it"); escape = 1; } else if(guess > answer) { System.out.println("Too High"); } else if(guess < answer) { System.out.println("Too Low"); } } System.out.println("Would you like to play again (y/n)"); char again = Keyboard.readChar(); if(again == 'y') { System.out.print ("\033c"); play = 1; } else if(again == 'n') { play--; } } } } all it did was print a wierd symbol back where it says "The computer is thinking of a number between 1 and 100."

Oct 7th, 2005, 2:37 AM	#15
bl00dninja Programming Guru Join Date: Oct 2004 Location: namespace std Posts: 1,246 Rep Power: 5	we can't compile anything that includes weird-ass files like cs1.keyboard unless we have that file. that's why all of the posts suck. nobody can run this thing. we're all just left here blowing in the wind. since it's an include, how about do a copy-and-paste and show the full source. __________________ i put on my robe and wizard hat... Have you ever heard of Plato, Aristotle, Socrates?...Morons.

Oct 9th, 2005, 10:36 AM	#18
tempest Programming Guru Join Date: Oct 2004 Posts: 1,041 Rep Power: 5	Swimmfree200 , the JVM can write to the screen can't it? Good becase that's all the terminal clear screen code needs. Thanks for the insight. [php] import java.io.; public class RunCommand { public static void main(String args[]) { String s = null; Process clear; try { clear = Runtime.getRuntime().exec("cls"); BufferedReader stdOut = new BufferedReader(new InputStreamReader(clear.getInputStream())); while((s = stdOut.readLine()) != null) System.out.print(s); System.exit(0); } catch (IOException e) { try { clear = Runtime.getRuntime().exec("clear"); BufferedReader stdOut = new BufferedReader(new InputStreamReader(clear.getInputStream())); while((s = stdOut.readLine()) != null) System.out.print(s); System.exit(0); } catch(IOException d) { System.out.println("Get a real machine:"); d.printStackTrace(); System.exit(-1); } } } } [/php] That program clears the screen or throws an IOException on any windows or unix machine with the commands "cls" or "clear" respectively. __________________ Last edited by tempest; Oct 9th, 2005 at 10:48 AM.*

Oct 10th, 2005, 9:53 AM	#20
tempest Programming Guru Join Date: Oct 2004 Posts: 1,041 Rep Power: 5	There are two things that can go wrong, you can not have "clear" or not have "cls"... if you can't debug that without debugging information you've got issues as a programmer. Not to mention that this is supposed to be wrong in a terminal, so this code would be useless anywhere else... __________________

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Oct 4th, 2005, 6:16 PM	#11
Silvanus Hobbyist Programmer Join Date: Aug 2005 Location: Hiding from... them... Posts: 110 Rep Power: 3	You probably want to put it in the if statement that checks if again == y.

Oct 6th, 2005, 6:34 PM	#14
crawforddavid2006 Expert Programmer Join Date: Apr 2005 Location: Not sure yet Posts: 572 Rep Power: 0	what will work on windows because that is what i'm using

Oct 7th, 2005, 7:41 PM	#16
crawforddavid2006 Expert Programmer Join Date: Apr 2005 Location: Not sure yet Posts: 572 Rep Power: 0	Try this

Oct 9th, 2005, 10:15 AM	#17
Swimmfree200 Newbie Join Date: Oct 2005 Posts: 2 Rep Power: 0	I didnt get too look at what crawford posted but i know that with the JVM you cannot make direct calls to the operating system. This means that the terminal clear code will not work. Also with the skipping lines, this leaves you at the bottom of the screen and most people do not want this. This leaves you really with only one way of doing it. Java has a class which allows you to call "Native classes" meaning classes written in different languages. This means you can write a class in C++ or C that clears the screen and make a call to it in java. Im working on this problem myself right now and am not exactly sure the way to go about it. Here is a link to a class that was already written by someone that will do it for u. http://mimosa.snu.ac.kr/~danke/etc/ClearScreen.zip I also found another way of doing it using ANSI code but it requires you to alter your config.sys file. This would then make the code machine specific. If you want this code too just let me know.

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Programming Forums > Application Development > Java

How do I clear the screen?