我的任务是创建一个Swing程序来计算圆形，三角形或矩形的面积。我做到了现在，如何添加clearMenu按钮来清除菜单？
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/*
THIS PROGRAM USES SWING TO CALCULATE THE AREA OF EITHER A
RECTANGLE, CIRCLE, OR TRIANGLE
*/
package AreaCalc;
/**
*
* @author alexcarr
*/
public class SwingAreaCalculator extends javax.swing.JFrame {
/**
* Creates new form SwingAreaCalculator
*/
public SwingAreaCalculator() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
buttonGroup1 = new javax.swing.ButtonGroup();
circleButton = new javax.swing.JRadioButton();
triangleButton = new javax.swing.JRadioButton();
rectangleButton = new javax.swing.JRadioButton();
dimension1 = new javax.swing.JLabel();
dimension2 = new javax.swing.JLabel();
dimension1TextField = new javax.swing.JTextField();
dimension2TextField = new javax.swing.JTextField();
dimension1Inches = new javax.swing.JLabel();
dimension2Inches = new javax.swing.JLabel();
calculateButton = new javax.swing.JButton();
jLabel5 = new javax.swing.JLabel();
jLabel6 = new javax.swing.JLabel();
jMenuBar1 = new javax.swing.JMenuBar();
jMenu1 = new javax.swing.JMenu();
jMenu2 = new javax.swing.JMenu();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Area Calculator");
buttonGroup1.add(circleButton);
circleButton.setText("Circle");
circleButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
circleButtonActionPerformed(evt);
}
});
buttonGroup1.add(triangleButton);
triangleButton.setText("Triangle");
buttonGroup1.add(rectangleButton);
rectangleButton.setText("Rectangle");
dimension1.setText("Dimension 1:");
dimension2.setText("Dimension 2:");
dimension2TextField.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
dimension2TextFieldActionPerformed(evt);
}
});
dimension1Inches.setText("inches");
dimension2Inches.setText("inches");
calculateButton.setText("Calculate Area");
calculateButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
calculateButtonActionPerformed(evt);
}
});
jLabel5.setText("The area is:");
jMenu1.setText("File");
jMenuBar1.add(jMenu1);
jMenu2.setText("Edit");
jMenuBar1.add(jMenu2);
setJMenuBar(jMenuBar1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel5)
.addGap(18, 18, 18)
.addComponent(jLabel6))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(calculateButton)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
.addComponent(dimension2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(dimension2TextField, javax.swing.GroupLayout.PREFERRED_SIZE, 101, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(dimension2Inches))
.addGroup(layout.createSequentialGroup()
.addComponent(circleButton)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(triangleButton)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(rectangleButton))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(dimension1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(dimension1TextField, javax.swing.GroupLayout.PREFERRED_SIZE, 101, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(dimension1Inches)
.addGap(65, 65, 65)))
.addContainerGap(91, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(circleButton)
.addComponent(triangleButton)
.addComponent(rectangleButton))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(23, 23, 23)
.addComponent(dimension1)
.addGap(18, 18, 18))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(dimension1TextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(dimension1Inches))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(dimension2)
.addComponent(dimension2TextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(dimension2Inches))
.addGap(18, 18, 18)
.addComponent(calculateButton)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel5)
.addComponent(jLabel6))
.addContainerGap(89, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void circleButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void dimension2TextFieldActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void calculateButtonActionPerformed(java.awt.event.ActionEvent evt) {
double area = 0; //placeholder area
//circle execution
if (circleButton.isSelected())
{
String strRadius = dimension1TextField.getText();
int radius = Integer.parseInt(strRadius);
area = areaCircle(radius);
}
String strArea = String.valueOf(area);
jLabel6.setText(strArea + " square inches");
//rectangle execution
if (rectangleButton.isSelected())
{
String strLength = dimension1TextField.getText();
double length = Integer.parseInt(strLength);
String strWidth = dimension2TextField.getText();
double width = Integer.parseInt(strWidth);
area = areaRectangle(length, width);
String strArea1 = String.valueOf(area);
jLabel6.setText(strArea1 + " square inches");
}
//triangle execution
if (triangleButton.isSelected())
{
String strLength = dimension1TextField.getText();
double length = Integer.parseInt(strLength);
String strWidth = dimension2TextField.getText();
double width = Integer.parseInt(strWidth);
area = areaTriangle(length, width);
String strArea1 = String.valueOf(area);
jLabel6.setText(strArea1 + " square inches");
}
}
//circle calculation
public static double areaCircle (double radius)
{
//Area formula for circle
double areaCircle = (int) (Math.pow(radius, 2) * (Math.PI));
return areaCircle;
}
//rectangle calculation
public static double areaRectangle (double length, double width)
{
//Area formula for rectangle
int areaRectangle = (int) (length * width);
//Print area
return areaRectangle;
}
//triangle calculation
public static double areaTriangle (double length, double width)
{
int areaTriangle = (int) ((length*width)/2);
return areaTriangle;
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(SwingAreaCalculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(SwingAreaCalculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(SwingAreaCalculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(SwingAreaCalculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new SwingAreaCalculator().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.ButtonGroup buttonGroup1;
private javax.swing.JButton calculateButton;
private javax.swing.JRadioButton circleButton;
private javax.swing.JLabel dimension1;
private javax.swing.JLabel dimension1Inches;
private javax.swing.JTextField dimension1TextField;
private javax.swing.JLabel dimension2;
private javax.swing.JLabel dimension2Inches;
private javax.swing.JTextField dimension2TextField;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel6;
private javax.swing.JMenu jMenu1;
private javax.swing.JMenu jMenu2;
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JRadioButton rectangleButton;
private javax.swing.JRadioButton triangleButton;
// End of variables declaration
}