• Lesson4

Posted: **Mon Aug 31, 2020 9:21 am**

From now on we will use the ready-made library Open Source Physics Core Library.
You should download this library using the next link
https://easy-english-study.com/osp.jar
and include it in NetBeans everytime before compiling projects
Open NetBeans and right-click on the project name in the Projects tab.
Select Properties.
Select Libraries.
Click the Add Jar/Folder button.

: classpath.png (32.11 KiB) Viewed 2093 times

Navigate to the directory where the downloaded osp.jar file is.

Posted: **Mon Aug 31, 2020 9:23 am**

Create the project PlotFrameApp.

Posted: **Mon Aug 31, 2020 9:59 am**

package plotframeapp;
import org.opensourcephysics.frames.PlotFrame;
public class PlotFrameApp{
public static void main (String[] args){
PlotFrame frame=new PlotFrame ("x","sin(x)/x","Plot example");
for (int i=1; i<=100; i++){
double x=i*0.2;
frame.append (0,x,Math.sin(x)/x) ;
}
frame.setVisible(true) ;
frame.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
}
}

Posted: **Mon Aug 31, 2020 9:59 am**

Code: Select all

package plotframeapp;
import org.opensourcephysics.frames.PlotFrame;
public class PlotFrameApp{
public static void main (String[] args){
PlotFrame frame=new PlotFrame ("x","sin(x)/x","Plot example");
for (int i=1; i<=100; i++){
double x=i*0.2;
frame.append (0,x,Math.sin(x)/x) ;
}
frame.setVisible(true) ;
frame.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
}   
}

Posted: **Mon Aug 31, 2020 10:25 am**

The screenshot of PlotFrameApp program.

Posted: **Mon Aug 31, 2020 10:36 am**

This program draws points of the function sin(x)/x using the library osp.jar.

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