Exception in thread "AWT-EventQueue-0" java.lang.ArithmeticException: / by zero
at factoroperations.compute(factoroperations.java:21)
at factorframe$buttonhandler.actionPerformed(factorframe.java:71)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:20
18)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.jav
a:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259
)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6504)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6269)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4860)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4686)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832
)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2713)
at java.awt.Component.dispatchEvent(Component.java:4686)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
at java.awt.EventQueue.access$000(EventQueue.java:101)
at java.awt.EventQueue$3.run(EventQueue.java:666)
at java.awt.EventQueue$3.run(EventQueue.java:664)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:680)
at java.awt.EventQueue$4.run(EventQueue.java:678)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:211)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:128)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:117)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
//Project: A program that factors numbers
//This defines the properties of the user interface
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Font;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JTextField;
import javax.swing.JLabel;
public class factorframe extends JFrame
{//declare all the variables
private JLabel integerlabel;
private JTextField integerfield;
private JLabel factorslabel;
private JTextField factorsfield;
private JLabel namelabel;
private JButton computebutton;
private JButton clearbutton;
private JButton exitbutton;
private String integerstring;
private long integer;
private String factorsstring;
private int factors;
private factoroperations factormachine;
public factorframe() //This is the constructor
{ //add all buttons and fields
super("Factor Frame");
setLayout(new FlowLayout());
namelabel = new JLabel("Integer Factorization By Michael Daigh");
add(namelabel);
integerlabel = new JLabel("Enter an integer:");
add(integerlabel);
integerfield = new JTextField(20);
add(integerfield);
factorslabel = new JLabel("The factors are:");
add(factorslabel);
factorsfield = new JTextField(20);
add(factorsfield);
computebutton = new JButton("Compute Factors");
add(computebutton);
clearbutton = new JButton("Clear");
add(clearbutton);
exitbutton = new JButton("Exit");
add(exitbutton);
buttonhandler myhandler = new buttonhandler();
computebutton.addActionListener(myhandler);
clearbutton.addActionListener(myhandler);
exitbutton.addActionListener(myhandler);
factormachine = new factoroperations();
}//End of constructor method
private class buttonhandler implements ActionListener
{public void actionPerformed(ActionEvent event)
{
if(event.getSource() == computebutton)//if user clicks compute factors
{//computes the factors of the number
integerstring = integerfield.getText();//get the number
integer = Long.parseLong(integerstring);
factorsstring = factoroperations.compute(integer);
factorsfield.setText(factorsstring);//display the factors
}
else if(event.getSource() == clearbutton)//if user clicks clear
{//clears all data in integer field and factor field
integer=0;
integerfield.setText("");
factors=0;
factorsfield.setText("");
}
else if(event.getSource() == exitbutton)//if user clicks exit
{//exits the program
System.exit(0);
}
else
System.out.println("Unknown error");
}//End of actionPerformed
}//End of buttonhandler class
}//End of factorframe class
//Project: A program that factors numbers
//This contains the algorithm used by this project.
public class factoroperations
{
public static String compute(long integer)
{
String factor="";//initialize the factor string
int check = 1;//initialize the prime check
for(int i=2; i<=integer/2; i++)
{
if(integer%i==0)//i is a factor of the number
{
for(int k=2; k<i; k++)//check if it is prime
{
if(i%k ==0)
{
check = 1;
break;
}
else
check = 0;
}
if(check == 0 || i == 2)//display the prime factors only
{
factor = factor + " " + i + "P";
}
else if(check == 1)//display all other factors
factor = factor + " " + i;
}
}
if(factor == "")//if number does not factor, it is already prime
{
factor = "No factors. It is a prime number";
}
return factor;
}
}//End factoroperations class
//Project: A program that factors numbers
//This activates the user interface.
import javax.swing.JFrame;
public class testfactor
{public static void main(String[] args)
{factorframe myframe = new factorframe();
myframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myframe.setSize(325,225);
myframe.setVisible(true);
}//End of main
}//End of class testfactor