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Listing 11 . Source code for the program named DotProd3D01.
/*DotProd3D01.java
Copyright 2008, R.G.BaldwinRevised 03/04/08
Study Kjell through Chapter 8 - Length, Orthogonality, andthe Column Matrix Dot product.
The purpose of this program is to confirm proper operationof the ColMatrix3D.dot method.
The program creates a GUI that allows the user to enterthree values for each of a pair of ColMatrix3D objects
along with a button labeled OK.When the user clicks the OK button, the dot product
between the two ColMatrix3D objects is computed. Theresulting value is converted to four decimal digits and
displayed in a text field on the GUI.Tested using JDK 1.6 under WinXP.
*********************************************************/import java.awt.*;
import javax.swing.*;import java.awt.event.*;
class DotProd3D01{public static void main(String[] args){GUI guiObj = new GUI();
}//end main}//end controlling class DotProd3D01
//======================================================//class GUI extends JFrame implements ActionListener{
//Specify the horizontal and vertical size of a JFrame// object.
int hSize = 470;int vSize = 150;
JTextField colMatA0 = new JTextField("0.57735");JTextField colMatA1 = new JTextField("0.57735");
JTextField colMatA2 = new JTextField("0.57735");JTextField colMatB0 = new JTextField("-0.57735");JTextField colMatB1 = new JTextField("-0.57735");
JTextField colMatB2 = new JTextField("-0.57735");JTextField dotProduct = new JTextField();JButton button = new JButton("OK");
//----------------------------------------------------//GUI(){//constructor//Set JFrame size, title, and close operation.
setSize(hSize,vSize);setTitle("Copyright 2008,R.G.Baldwin");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//Instantiate a JPanel that will house the user input// components and set its layout manager.
JPanel controlPanel = new JPanel();controlPanel.setLayout(new GridLayout(0,6));
//Add the user input components and appropriate labels// to the control panel.
controlPanel.add(new JLabel(" colMatA0 = "));controlPanel.add(colMatA0);
controlPanel.add(new JLabel(" colMatA1 = "));controlPanel.add(colMatA1);controlPanel.add(new JLabel(" colMatA2 = "));
controlPanel.add(colMatA2);controlPanel.add(new JLabel(" colMatB0 = "));controlPanel.add(colMatB0);controlPanel.add(new JLabel(" colMatB1 = "));
controlPanel.add(colMatB1);controlPanel.add(new JLabel(" colMatB2 = "));controlPanel.add(colMatB2);controlPanel.add(new JLabel(" Dot Prod = "));
controlPanel.add(dotProduct);controlPanel.add(new JLabel(""));//spacer
controlPanel.add(button);//Add the control panel to the CENTER position in the
// JFrame.this.getContentPane().add(
BorderLayout.CENTER,controlPanel);setVisible(true);
//Register this object as an action listener on the// button.
button.addActionListener(this);}//end constructor
//----------------------------------------------------////This method is called to respond to a click on the
// button.public void actionPerformed(ActionEvent e){
//Create two ColMatrix3D objects.GM02.ColMatrix3D matrixA = new GM02.ColMatrix3D(
Double.parseDouble(colMatA0.getText()),Double.parseDouble(colMatA1.getText()),
Double.parseDouble(colMatA2.getText()));GM02.ColMatrix3D matrixB = new GM02.ColMatrix3D(Double.parseDouble(colMatB0.getText()),
Double.parseDouble(colMatB1.getText()),Double.parseDouble(colMatB2.getText()));//Compute the dot product.
double dotProd = matrixA.dot(matrixB);//Eliminate exponential notation in the display.
if(Math.abs(dotProd)<0.001){
dotProd = 0.0;}//end if
//Convert to four decimal digits and display.dotProd =((int)(10000*dotProd))/10000.0;
dotProduct.setText("" + dotProd);}//end actionPerformed
//====================================================//}//end class GUI
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