我正在尝试使用JSwing api制作计算器。我已经做了大约一半，得到了计算器，以便它主要功能，但当我重新安排一些代码，使它更整洁，并为计算器添加一些新的选项，但我遇到了一个问题。当我运行它时，计算器的格式化都是错误的，但源代码尚未编辑。当我尝试使用GUI更改它时，窗口构建器会发出错误。
以下是我正在使用的代码：
package calculators;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JTextField;
import javax.swing.JLabel;
import java.awt.FlowLayout;
import net.miginfocom.swing.MigLayout;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import java.awt.Component;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.SwingConstants;
import javax.swing.JDesktopPane;
import org.eclipse.wb.swing.FocusTraversalOnArray;
import javax.swing.JSeparator;
import java.awt.Color;
import javax.swing.JCheckBox;
import javax.swing.JRadioButton;
import javax.swing.border.TitledBorder;
import javax.swing.JSpinner;
import javax.swing.SpinnerNumberModel;
import java.awt.Font;
private JPanel contentPane;
private JTextField textField;
JButton button0;
JButton button1;
JButton button2;
JButton button3;
JButton button4;
JButton button5;
JButton button6;
JButton button7;
JButton button8;
JButton button9;
JButton addNumbers;
JButton subNumbers;
JButton multNumbers;
JButton divNumbers;
JButton equalTo;
JButton clearAll;
JCheckBox integerMode;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
LiLCalculator frame = new LiLCalculator();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public LiLCalculator() {
setTitle("Lil Calculator");
JSeparator separator = new JSeparator();
separator.setOrientation(SwingConstants.VERTICAL);
separator.setForeground(Color.BLACK);
separator.setVisible(false);
JPanel panel = new JPanel();
panel.setBorder(new TitledBorder(null, "Precision", TitledBorder.LEADING, TitledBorder.TOP, null, null));
panel.setVisible(false);
JButton okButton = new JButton("<<<<OK");
okButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
}
});
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 470, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
textField = new JTextField();
textField.setEditable(false);
textField.setHorizontalAlignment(SwingConstants.RIGHT);
textField.setText("0");
textField.setColumns(10);
JLabel label = new JLabel("");
button1 = new JButton("1");
button1.setFont(new Font("Tahoma", Font.PLAIN, 9));
button1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(LiLCalculations.firstDigit()){
textField.setText("1");
LiLCalculations.setFirstDigit(false);
} else
textField.setText(textField.getText() + "1");
}
});
button2 = new JButton("2");
button2.setFont(new Font("Tahoma", Font.PLAIN, 9));
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(LiLCalculations.firstDigit()){
textField.setText("2");
LiLCalculations.setFirstDigit(false);
} else
textField.setText(textField.getText() + "2");
}
});
button4 = new JButton("4");
button4.setFont(new Font("Tahoma", Font.PLAIN, 9));
button4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(LiLCalculations.firstDigit()){
textField.setText("4");
LiLCalculations.setFirstDigit(false);
} else
textField.setText(textField.getText() + "4");
}
});
button5 = new JButton("5");
button5.setFont(new Font("Tahoma", Font.PLAIN, 9));
button5.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(LiLCalculations.firstDigit()){
textField.setText("5");
LiLCalculations.setFirstDigit(false);
} else
textField.setText(textField.getText() + "5");
}
});
button3 = new JButton("3");
button3.setFont(new Font("Tahoma", Font.PLAIN, 9));
button3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(LiLCalculations.firstDigit()){
textField.setText("3");
LiLCalculations.setFirstDigit(false);
} else
textField.setText(textField.getText() + "3");
}
});
button6 = new JButton("6");
button6.setFont(new Font("Tahoma", Font.PLAIN, 9));
button6.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(LiLCalculations.firstDigit()){
textField.setText("6");
LiLCalculations.setFirstDigit(false);
} else
textField.setText(textField.getText() + "6");
}
});
button7 = new JButton("7");
button7.setFont(new Font("Tahoma", Font.PLAIN, 9));
button7.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(LiLCalculations.firstDigit()){
textField.setText("7");
LiLCalculations.setFirstDigit(false);
} else
textField.setText(textField.getText() + "7");
}
});
button8 = new JButton("8");
button8.setFont(new Font("Tahoma", Font.PLAIN, 9));
button8.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(LiLCalculations.firstDigit()){
textField.setText("8");
LiLCalculations.setFirstDigit(false);
} else
textField.setText(textField.getText() + "8");
}
});
button9 = new JButton("9");
button9.setFont(new Font("Tahoma", Font.PLAIN, 9));
button9.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(LiLCalculations.firstDigit()){
textField.setText("9");
LiLCalculations.setFirstDigit(false);
} else
textField.setText(textField.getText() + "9");
}
});
button0 = new JButton("0");
button0.setFont(new Font("Tahoma", Font.PLAIN, 9));
button0.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(LiLCalculations.firstDigit()){
textField.setText("0");
LiLCalculations.setFirstDigit(false);
} else
textField.setText(textField.getText() + "0");
}
});
subNumbers = new JButton("-");
subNumbers.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
long x = Long.parseLong(textField.getText());
LiLCalculations.setFirstDigit(true);
LiLCalculations.setCalcSelect(2);
LiLCalculations.setFirstNumber(x);
}
});
divNumbers = new JButton("/");
divNumbers.setFont(new Font("Tahoma", Font.PLAIN, 9));
divNumbers.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
long x = Long.parseLong(textField.getText());
button0.setEnabled(false);
LiLCalculations.setFirstDigit(true);
LiLCalculations.setCalcSelect(4);
LiLCalculations.setFirstNumber(x);
}
});
addNumbers = new JButton("+");
addNumbers.setFont(new Font("Tahoma", Font.PLAIN, 8));
addNumbers.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
long x = Long.parseLong(textField.getText());
LiLCalculations.setFirstDigit(true);
LiLCalculations.setCalcSelect(1);
LiLCalculations.setFirstNumber(x);
}
});
multNumbers = new JButton("*");
multNumbers.setFont(new Font("Tahoma", Font.PLAIN, 9));
multNumbers.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
long x = Long.parseLong(textField.getText());
LiLCalculations.setFirstDigit(true);
LiLCalculations.setCalcSelect(3);
LiLCalculations.setFirstNumber(x);
}
});
equalTo = new JButton("=");
equalTo.setFont(new Font("Tahoma", Font.PLAIN, 9));
equalTo.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
long y = Long.parseLong(textField.getText());
long z = LiLCalculations.getFirstNumber();
long ans = LiLCalculations.result(y, z);
textField.setText(Long.toString(ans));
LiLCalculations.setFirstDigit(true);
}
});
clearAll = new JButton("Clear All");
clearAll.setFont(new Font("Tahoma", Font.PLAIN, 9));
clearAll.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
textField.setText("0");
LiLCalculations.setFirstDigit(true);
}
});
JButton optionSelect = new JButton("Options");
optionSelect.setFont(new Font("Tahoma", Font.PLAIN, 9));
optionSelect.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
optionSelect.setEnabled(false);
}
});
JButton negativeNumbers = new JButton("+/-");
negativeNumbers.setFont(new Font("Tahoma", Font.PLAIN, 9));
negativeNumbers.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
long x = Long.parseLong(textField.getText());
x = x * -1;
textField.setText(Long.toString(x));
}
});
JRadioButton twoDecimalPlaces = new JRadioButton("2");
panel.add(twoDecimalPlaces);
panel.setVisible(false);
twoDecimalPlaces.setVisible(false);
JRadioButton fourDecimalPlaces = new JRadioButton("4");
fourDecimalPlaces.setSelected(true);
panel.add(fourDecimalPlaces);
fourDecimalPlaces.setVisible(false);
JRadioButton otherRadio = new JRadioButton("Other");
panel.add(otherRadio);
otherRadio.setVisible(false);
GroupLayout gl_contentPane = new GroupLayout(contentPane);
JButton decimalPoint = new JButton(".");
decimalPoint.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(integerMode.isSelected() == true){
decimalPoint.disable();
} else {
double x = Double.parseDouble(textField.getText());
if(LiLCalculations.firstDigit() == true){
textField.setText("." + Double.toString(x));
} else {
textField.setText( Double.toString(x) + ".");
}
decimalPoint.disable();
}
}
});
JCheckBox integerMode = new JCheckBox("Integer Arithmetic", true);
integerMode.addItemListener(new ItemListener(){
@Override
public void itemStateChanged(ItemEvent e) {
if(e.getSource() == integerMode){
if(integerMode.isSelected() == false){
JSpinner spinner = new JSpinner();
spinner.setVisible(false);
spinner.setModel(new SpinnerNumberModel(0, 0, 10, 1));
panel.add(spinner);
contentPane.setLayout(gl_contentPane);
setFocusTraversalPolicy(new FocusTraversalOnArray(new Component[]{contentPane, button1, button2, button3,
button4, button5, button6, button7, button8, button9,
button0, decimalPoint, addNumbers, subNumbers, multNumbers, divNumbers,
equalTo, negativeNumbers, clearAll, optionSelect, textField}));
otherRadio.setVisible(true);
panel.setVisible(true);
fourDecimalPlaces.setVisible(true);
twoDecimalPlaces.setVisible(true);
otherRadio.setVisible(true);
}
}
}
});
gl_contentPane.setHorizontalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addContainerGap()
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING, false)
.addComponent(textField)
.addGroup(gl_contentPane.createSequentialGroup()
.addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING)
.addComponent(button1, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING)
.addComponent(button7, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(button4, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE))
.addComponent(decimalPoint, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)))
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING, false)
.addGroup(gl_contentPane.createSequentialGroup()
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addComponent(button5, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(button2, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE))
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addComponent(button3, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(button6, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)))
.addGroup(gl_contentPane.createSequentialGroup()
.addComponent(button8, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addPreferredGap(ComponentPlacement.RELATED)
.addComponent(button9, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE))
.addComponent(button0, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addComponent(subNumbers, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(multNumbers, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(divNumbers, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(addNumbers, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE))
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING, false)
.addComponent(negativeNumbers, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(equalTo, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(clearAll, GroupLayout.DEFAULT_SIZE, 86, Short.MAX_VALUE)
.addComponent(optionSelect, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
.addGap(18)
.addComponent(separator, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
.addPreferredGap(ComponentPlacement.UNRELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING, false)
.addComponent(integerMode, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(okButton, GroupLayout.PREFERRED_SIZE, 86, GroupLayout.PREFERRED_SIZE))
.addComponent(panel, 0, 0, Short.MAX_VALUE))
.addContainerGap())
);
gl_contentPane.setVerticalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addGap(18)
.addComponent(textField, GroupLayout.PREFERRED_SIZE, 28, GroupLayout.PREFERRED_SIZE)
.addGap(3)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(button1, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(button2, GroupLayout.DEFAULT_SIZE, 40, Short.MAX_VALUE)
.addComponent(button3, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(addNumbers, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(negativeNumbers, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE))
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(button6, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(button5, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(button4, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(subNumbers, GroupLayout.DEFAULT_SIZE, 40, Short.MAX_VALUE)
.addComponent(equalTo, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE))
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(button7, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(button8, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(button9, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(multNumbers, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(optionSelect, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE))
.addPreferredGap(ComponentPlacement.RELATED)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(decimalPoint, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(button0, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(divNumbers, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addComponent(clearAll, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE))
.addGap(25))
.addGroup(gl_contentPane.createSequentialGroup()
.addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(separator, GroupLayout.PREFERRED_SIZE, 241, GroupLayout.PREFERRED_SIZE)
.addContainerGap())
.addGroup(gl_contentPane.createSequentialGroup()
.addGap(29)
.addComponent(integerMode)
.addGap(18)
.addComponent(panel, GroupLayout.PREFERRED_SIZE, 110, GroupLayout.PREFERRED_SIZE)
.addGap(26)
.addComponent(okButton, GroupLayout.PREFERRED_SIZE, 40, GroupLayout.PREFERRED_SIZE)
.addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
}
以下是我从窗口查看器中获得的错误：
``
Internal Error
WindowBuilder encountered unexpected internal error.
This could be caused by a WindowBuilder bug or by a misconfiguration issue, conflict, partial update, etc.
> org.eclipse.wb.internal.core.utils.check.AssertionFailedException:
> {new: javax.swing.JButton} {local-unique: decimalPoint} {/new
> JButton(".")/ /decimalPoint.addActionListener(new ActionListener() {
> public void actionPerformed(ActionEvent e) {
> if(integerMode.isSelected() == true){ decimalPoint.disable(); } else {
> double x = Double.parseDouble(textField.getText());
> if(LiLCalculations.firstDigit() == true){ textField.setText("." +
> Double.toString(x)); } else { textField.setText( Double.toString(x) +
> "."); } decimalPoint.disable(); } } })/} is not created at after
> GroupLayout gl_contentPane=new GroupLayout(contentPane); in package
> calculators; import java.awt.BorderLayout; import java.awt.EventQueue;
> import javax.swing.Box; import javax.swing.JFrame; import
> javax.swing.JPanel; import javax.swing.border.EmptyBorder; import
> javax.swing.JButton; import java.awt.event.ActionListener; import
> java.awt.event.ActionEvent; import java.awt.event.ItemEvent; import
> java.awt.event.ItemListener; import javax.swing.JTextField; import
> javax.swing.JLabel; import java.awt.FlowLayout; import
> net.miginfocom.swing.MigLayout; import javax.swing.GroupLayout; import
> javax.swing.GroupLayout.Alignment; import java.awt.Component; import
> javax.swing.LayoutStyle.ComponentPlacement; import
> javax.swing.SwingConstants; import javax.swing.JDesktopPane; import
> org.eclipse.wb.swing.FocusTraversalOnArray; import
> javax.swing.JSeparator; import java.awt.Color; import
> javax.swing.JCheckBox; import javax.swing.JRadioButton; import
> javax.swing.border.TitledBorder; import javax.swing.JSpinner; import
> javax.swing.SpinnerNumberModel; import java.awt.Font; public class
> LiLCalculator extends JFrame { private JPanel contentPane; private
> JTextField textField; JButton button0; JButton button1; JButton
> button2; JButton button3; JButton button4; JButton button5; JButton
> button6; JButton button7; JButton button8; JButton button9; JButton
> addNumbers; JButton subNumbers; JButton multNumbers; JButton
> divNumbers; JButton equalTo; JButton clearAll; JCheckBox integerMode;
> /** * Launch the application. */ public static void main(String[]
> args) { EventQueue.invokeLater(new Runnable() { public void run() {
> try { LiLCalculator frame = new LiLCalculator();
> frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); }
> } }); } /** * Create the frame. */ public LiLCalculator() {
> setTitle("Lil Calculator"); JSeparator separator = new JSeparator();
> separator.setOrientation(SwingConstants.VERTICAL);
> separator.setForeground(Color.BLACK); separator.setVisible(false);
> JPanel panel = new JPanel(); panel.setBorder(new TitledBorder(null,
> "Precision", TitledBorder.LEADING, TitledBorder.TOP, null, null));
> panel.setVisible(false); JButton okButton = new JButton("<<< ``
我会发布一张图片，说明我希望我的计算器模型看起来与现在看起来如何，但我没有足够的声誉，但我想知道为什么计算器组件忽略了我的指示而只是直接出现线。另外，我想知道是否有人知道这个错误是什么？由于Window构建器的错误，我不得不多次重启eclipse，并想知道我能做些什么来修复它。非常感谢你。
（如果需要，我可以发布完整的堆栈错误，我实际上不确定如何格式化我的错误，如代码，所以有人可以编辑它，使它看起来像在代码块中？）< / p> 编辑：请问为什么这个问题被低估了？
答案 0 :(得分：0)
修复重复代码后，您需要修复其他一些内容。
public class LilCalculator extends JFrame { contentPane.setLayout(gl_contentPane);