我正在写一个eJuice计算器。它完全没有完成，你将在下面看到。我的问题是：我有4个JCheckBox和5个可编辑的JTextField;我可以使用一个ActionListener来执行程序执行的东西。或者我需要一个用于CheckBoxes的监听器和一个用于TextField的监听器吗？
这是一段粗略的代码草案。
package ejuicecalculatorv2;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class EJuiceCalculatorV2 extends JFrame {
//Form Controls
private JCheckBox isPGbasedNic_CB = new JCheckBox("PG Based NIC");
private JCheckBox isPGbasedFlavor_CB = new JCheckBox("PG Based Flavor");
private JCheckBox isVGbasedNic_CB = new JCheckBox("VG Based NIC");
private JCheckBox isVGbasedFlavor_CB = new JCheckBox("VG Based Flavor");
private JTextField batchSize_TF = new JTextField(5);
private JLabel batchSize_LB = new JLabel("Batch Size:");
private JTextField baseNicStrength_TF = new JTextField(5);
private JLabel baseNicStrength_LB = new JLabel("Base NIC Strength:");
private JTextField targetNicStrength_TF = new JTextField(5);
private JLabel targetNicStrength_LB = new JLabel("Target NIC Strength:");
private JTextField totalNic_TF = new JTextField(5);
private JLabel totalNic_LB = new JLabel("Total NIC:");
private JTextField flavorStrength_TF = new JTextField(5);
private JLabel flavorStrength_LB = new JLabel("Flavoring Strength:");
private JTextField totalFlavor_TF = new JTextField(5);
private JLabel totalFlavor_LB = new JLabel("Total Flavoring:");
private JTextField vgRatio_TF = new JTextField(5);
private JLabel vgRatio_LB = new JLabel("VG Ratio:");
private JTextField pgRatio_TF = new JTextField(5);
private JLabel pgRatio_LB = new JLabel("PG Ratio:");
private JTextField additionalVG_TF = new JTextField(5);
private JLabel additionalVG_LB = new JLabel("Additional VG:");
private JTextField additionalPG_TF = new JTextField(5);
private JLabel additionalPG_LB = new JLabel("Additional PG:");
private JTextField totalVG_TF = new JTextField(5);
private JLabel totalVG_LB = new JLabel("Total VG:");
private JTextField totalPG_TF = new JTextField(5);
private JLabel totalPG_LB = new JLabel("Total PG:");
private JTextField vgBasedIng_TF = new JTextField(5);
private JLabel vgBasedIng_LB = new JLabel("Total VG Ingredients:");
private JTextField pgBasedIng_TF = new JTextField(5);
private JLabel pgBasedIng_LB = new JLabel("Total PG Ingredients:");
//Variables
private boolean _PGnicFlag;
private boolean _VGnicFlag;
private boolean _PGflavorFlag;
private boolean _VGflavorFlag;
private double baseNic;
private double targetNic;
private double totalNic;
private double flavorStrength;
private double totalFlavor;
private double batchSize;
private double totalPG;
private double totalVG;
private double additionalVG;
private double additionalPG;
private double pgBasedIng;
private double vgBasedIng;
private double pgRatio;
private double vgRatio;
public EJuiceCalculatorV2() {
super("EJuice Calculator V2");
setLayout(new FlowLayout());
//Add CheckBoxes
add(isPGbasedNic_CB);
add(isPGbasedFlavor_CB);
add(isVGbasedNic_CB);
add(isVGbasedFlavor_CB);
//Add TextFields and Labels
add(batchSize_LB);
add(batchSize_TF);
add(vgRatio_LB);
add(vgRatio_TF);
add(pgRatio_LB);
add(pgRatio_TF);
add(baseNicStrength_LB);
add(baseNicStrength_TF);
add(targetNicStrength_LB);
add(targetNicStrength_TF);
add(flavorStrength_LB);
add(flavorStrength_TF);
//Add ActionListeners
ActionListener actionListener = new ActionHandler();
isPGbasedNic_CB.addActionListener(actionListener);
isPGbasedFlavor_CB.addActionListener(actionListener);
isVGbasedNic_CB.addActionListener(actionListener);
isVGbasedFlavor_CB.addActionListener(actionListener);
batchSize_TF.addActionListener(actionListener);
vgRatio_TF.addActionListener(actionListener);
pgRatio_TF.addActionListener(actionListener);
baseNicStrength_TF.addActionListener(actionListener);
targetNicStrength_TF.addActionListener(actionListener);
flavorStrength_TF.addActionListener(actionListener);
pack();
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
class ActionHandler implements ActionListener {
@Override
public void actionPerformed(ActionEvent event){
//if event.getSource() == JCheckBox then execute the following code.
if(checkBox.isSelected()){
if(checkBox == isPGbasedNic_CB){
_PGnicFlag = true;
_VGnicFlag = false;
checkBox = isVGbasedNic_CB;
checkBox.setSelected(false);
}
else if(checkBox == isVGbasedNic_CB){
_VGnicFlag = true;
_PGnicFlag = false;
checkBox = isPGbasedNic_CB;
checkBox.setSelected(false);
}
else if(checkBox == isVGbasedFlavor_CB){
_VGflavorFlag = true;
_PGflavorFlag = false;
checkBox = isPGbasedFlavor_CB;
checkBox.setSelected(false);
}
else if(checkBox == isPGbasedFlavor_CB){
_PGflavorFlag = true;
_VGflavorFlag = false;
checkBox = isVGbasedFlavor_CB;
checkBox.setSelected(false);
}
}
else{
if(checkBox == isPGbasedNic_CB){
_PGnicFlag = false;
_VGnicFlag = true;
}
else if(checkBox == isVGbasedNic_CB){
_VGnicFlag = false;
_PGnicFlag = true;
}
else if(checkBox == isVGbasedFlavor_CB){
_VGflavorFlag = false;
_PGflavorFlag = true;
}
else if(checkBox == isPGbasedFlavor_CB){
_PGflavorFlag = false;
_VGflavorFlag = true;
}
}
}
}
public static void main(String[] args) {
// TODO code application logic here
SwingUtilities.invokeLater(new Runnable(){
@Override
public void run (){
new EJuiceCalculatorV2().setVisible(true);
}
});
}
}
答案 0 :(得分：1)
我的问题是：我有4个JCheckBox和5个可编辑的JTextField;我可以使用一个ActionListener来执行程序执行的东西。或者我需要一个用于CheckBoxes的监听器和一个用于TextField的监听器吗？
您有一堆控件组件，但没有一个可以从GUI启动操作。而所有这些，JCheckBoxes和JTextField都可以获得输入，并且您似乎缺少一个最终组件，例如JButton。我会将这个组件添加到你的GUi中，我会单独添加一个ActionListener。然后在按下时，它会检查复选框和文本组件的状态，然后根据它们的状态，给用户提供适当的响应。
还有一些，如果不是大多数或所有的JTextField，我会改为JComboBoxes或JSpinners，以限制用户可以输入的输入到允许的内容，因为你不希望用户输入“是” “进入”批量大小“JTextField。
例如：
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.List;
import javax.swing.*;
import javax.swing.JSpinner.DefaultEditor;
@SuppressWarnings("serial")
public class JuiceTwo extends JPanel {
private static final String[] FLAVORS = {"Flavor 1", "Flavor 2", "Flavor 3", "Flavor 4"};
private static final Integer[] ALLOWABLE_BATCH_SIZES = {1, 2, 5, 10, 15, 20};
private static final String[] ALLOWABLE_VG_RATIOS = {"1/4", "1/3", "1/2", "1/1", "2/1", "3/1", "4/1", "8/1", "16/1"};
private List<JCheckBox> flavorBoxes = new ArrayList<>();
private JComboBox<Integer> batchSizeCombo;
private JSpinner vgRatioSpinner;
public JuiceTwo() {
// JPanel to hold the flavor JCheckBoxes
JPanel flavorPanel = new JPanel(new GridLayout(0, 1)); // hold them in vertical grid
flavorPanel.setBorder(BorderFactory.createTitledBorder("Flavors"));
for (String flavor : FLAVORS) {
JCheckBox flavorBox = new JCheckBox(flavor);
flavorBox.setActionCommand(flavor);
flavorPanel.add(flavorBox);
flavorBoxes.add(flavorBox);
}
batchSizeCombo = new JComboBox<>(ALLOWABLE_BATCH_SIZES);
SpinnerListModel vgRatioModel = new SpinnerListModel(ALLOWABLE_VG_RATIOS);
vgRatioSpinner = new JSpinner(vgRatioModel);
JComponent editor = vgRatioSpinner.getEditor();
if (editor instanceof DefaultEditor) {
((DefaultEditor)editor).getTextField().setColumns(4);
}
JButton getSelectionButton = new JButton("Get Selection");
getSelectionButton.setMnemonic(KeyEvent.VK_S);
getSelectionButton.addActionListener(new SelectionActionListener());
add(flavorPanel);
add(Box.createHorizontalStrut(20));
add(new JLabel("Batch Size:"));
add(batchSizeCombo);
add(Box.createHorizontalStrut(20));
add(new JLabel("VG Ratio:"));
add(vgRatioSpinner);
add(Box.createHorizontalStrut(20));
add(getSelectionButton);
}
private class SelectionActionListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
for (JCheckBox flavorBox : flavorBoxes) {
System.out.printf("%s selected: %b%n", flavorBox.getActionCommand(), flavorBox.isSelected());
}
System.out.println("Batch Size: " + batchSizeCombo.getSelectedItem());
System.out.println("VG Ration: " + vgRatioSpinner.getValue());
System.out.println();
}
}
private static void createAndShowGui() {
JuiceTwo mainPanel = new JuiceTwo();
JFrame frame = new JFrame("JuiceTwo");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> createAndShowGui());
}
}