jgrasp

I need help creating an instance variable and constructors [closed]

由 妖精的绣舞 提交于 2019-12-02 02:16:02
问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . Sorry, I know this answer is obvious but I suppose I'm just slow. Can anyone give me clear definitions of an instance variable and a constructor? Instance variables: Your class will need an instance variable

“Cannot Open a.exe” Error in C++

由 家住魔仙堡 提交于 2019-12-02 02:08:33
I'm trying to compile my C++ program, but when I press the "Build" button, it displays the following error message: c:/gnat/2010/bin/../libexec/gcc/i686-pc-mingw32/4.3.6/ld.exe: cannot open output file a.exe: Invalid argument collect2: ld returned 1 exit status This is not the first time it has done this. It seems to do this most when I have been editing the same project a lot and building it often, almost as if something has been flooded, or overloaded, or something. I had fixed it before, I believe, by restarting my PC, but I can't afford to keep restarting my PC every time this occurs. I

How to get started with JFreeChart?

由 北城以北 提交于 2019-12-01 23:28:07
问题 I have downloaded the latest version of JFreeChart (1.0.14) and want to start using it. I only have imported standard Java packages like java.io.* before and never dealt with 3rd party libraries. What do I need to tell jGRASP so it knows about and can access the JFreeChart library? I have tried to import it like this import org.jfree.chart.ChartFactory; but getting the following error java:1: package org.jfree.chart does not exist . 回答1: You have to add a library's jar file into both compile

How to get started with JFreeChart?

由 穿精又带淫゛_ 提交于 2019-12-01 21:00:49
I have downloaded the latest version of JFreeChart (1.0.14) and want to start using it. I only have imported standard Java packages like java.io.* before and never dealt with 3rd party libraries. What do I need to tell jGRASP so it knows about and can access the JFreeChart library? I have tried to import it like this import org.jfree.chart.ChartFactory; but getting the following error java:1: package org.jfree.chart does not exist . You have to add a library's jar file into both compile-time and run-time CLASSPATH . In jGRASP you can do it through "Settings > PATH/CLASSPATH > Workspace" dialog

drawingPanel color change with displacement

由 这一生的挚爱 提交于 2019-11-28 14:40:53
I'm using JGrasp, and in drawingPanel , I'm trying to create a ball that changes colors as it moves across the screen. Right now, I've got: for (int i = 10; i<=i; i++) { Color c = new Color(i*i, 0, 0); pen.setColor(c); My full simplified code is: import java.awt.*; import java.util.*; import java.awt.Color; public class BallSample { public static final int SIZE = 30; public static final int HALF = SIZE / 2; public static void main(String[] args) { Scanner console = new Scanner(System.in); DrawingPanel panel = new DrawingPanel(1000, 1000); panel.setBackground(Color.CYAN); Graphics pen = panel
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