非常に基本的な統計計算プログラム用のカスタムパネルを作成しようとしています。数字を入力するための1から9までのボタンと、 ActionListenerそれらを処理するために実装する単一の内部クラスがあります。番号は、JLabelと呼ばれるに表示されdisplayます。プログラムは正しくコンパイルされますが、リスナーが機能していないようで、これらのボタンをクリックしても何も起こりません。コードは次のとおりです。
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.border.BevelBorder;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
@SuppressWarnings("serial") public class StatCalcPanelBeta extends JPanel{
private class InputHandler implements ActionListener{
@Override public void actionPerformed(ActionEvent evt){
String str = evt.toString();
switch(str){
case "1":
inputString.append("1");
inputField.setText(inputString.toString());
break;
case "2":
inputString.append("2");
inputField.setText(inputString.toString());
break;
case "3":
inputString.append("3");
inputField.setText(inputString.toString());
break;
case "4":
inputString.append("4");
inputField.setText(inputString.toString());
break;
case "5":
inputString.append("5");
inputField.setText(inputString.toString());
break;
case "6":
inputString.append("6");
inputField.setText(inputString.toString());
break;
case "7":
inputString.append("7");
inputField.setText(inputString.toString());
break;
case "8":
inputString.append("8");
inputField.setText(inputString.toString());
break;
case "9":
inputString.append("9");
inputField.setText(inputString.toString());
break;
}
}
}
private final StatCalc calculator;
private JLabel display;
private JPanel displayPanel;
private JTextField inputField;
private final StringBuffer inputString;
private JButton enter;
private JButton button_1;
private JButton button_2;
private JButton button_3;
private JButton button_4;
private JButton button_5;
private JButton button_6;
private JButton button_7;
private JButton button_8;
private JButton button_9;
private JPanel inputPanel;
private InputHandler ioListener;
private JButton count;
private JButton sum;
private JButton mean;
private JButton max;
private JButton min;
private JButton standardDeviation;
private JPanel functionPanel;
public StatCalcPanelBeta(){
calculator = new StatCalc();
inputString = new StringBuffer();
initialize();
}
private void initialize(){
setLayout(null);
displayPanel = new JPanel();
displayPanel.setBorder(new TitledBorder(new BevelBorder(BevelBorder.LOWERED, null, null,
null, null), "Display", TitledBorder.LEADING, TitledBorder.TOP, null, null));
displayPanel.setBounds(10, 11, 190, 53);
add(displayPanel);
displayPanel.setLayout(null);
display = new JLabel("Display");
display.setBounds(0, 11, 180, 37);
displayPanel.add(display);
display.setHorizontalAlignment(SwingConstants.CENTER);
inputPanel = new JPanel();
inputPanel.setBorder(new TitledBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null),
"Input", TitledBorder.LEADING, TitledBorder.TOP, null, null));
inputPanel.setBounds(0, 72, 211, 145);
this.add(inputPanel);
inputPanel.setLayout(null);
ioListener = new InputHandler();
inputField = new JTextField(inputString.toString());
inputField.setEditable(false);
inputField.setBounds(9, 16, 86, 20);
inputPanel.add(inputField);
inputField.setColumns(10);
enter = new JButton("Enter");
enter.addActionListener(new ActionListener(){
@Override public void actionPerformed(ActionEvent arg0){
try{
calculator.enter(Double.parseDouble(inputString.toString()));
} catch(NumberFormatException e){
e.printStackTrace();
}
display.setText("");
}
});
enter.setToolTipText("Enters the number displayed on the input field");
enter.setBounds(110, 16, 89, 23);
inputPanel.add(enter);
button_1 = new JButton("1");
button_1.setBounds(6, 47, 65, 23);
button_1.addActionListener(ioListener);
inputPanel.add(button_1);
button_2 = new JButton("2");
button_2.setBounds(73, 47, 65, 23);
button_2.addActionListener(ioListener);
inputPanel.add(button_2);
button_3 = new JButton("3");
button_3.setBounds(140, 47, 65, 23);
button_3.addActionListener(ioListener);
inputPanel.add(button_3);
button_4 = new JButton("4");
button_4.setBounds(6, 81, 65, 23);
button_4.addActionListener(ioListener);
inputPanel.add(button_4);
button_5 = new JButton("5");
button_5.setBounds(73, 81, 65, 23);
button_5.addActionListener(ioListener);
inputPanel.add(button_5);
button_6 = new JButton("6");
button_6.setBounds(140, 81, 65, 23);
button_6.addActionListener(ioListener);
inputPanel.add(button_6);
button_7 = new JButton("7");
button_7.setBounds(6, 115, 65, 23);
button_7.addActionListener(ioListener);
inputPanel.add(button_7);
button_8 = new JButton("8");
button_8.setBounds(73, 115, 65, 23);
button_8.addActionListener(ioListener);
inputPanel.add(button_8);
button_9 = new JButton("9");
button_9.setBounds(140, 115, 65, 23);
button_9.addActionListener(ioListener);
inputPanel.add(button_9);
functionPanel = new JPanel();
functionPanel.setBorder(new TitledBorder(
new EtchedBorder(EtchedBorder.LOWERED, null, null), "Functions",
TitledBorder.LEADING, TitledBorder.TOP, null, null));
functionPanel.setBounds(0, 228, 211, 113);
this.add(functionPanel);
functionPanel.setLayout(null);
count = new JButton("Count");
count.addActionListener(new ActionListener(){
@Override public void actionPerformed(ActionEvent arg0){
display.setText(Integer.toString(calculator.getCount()));
}
});
count.setBounds(6, 16, 65, 23);
functionPanel.add(count);
sum = new JButton("Sum");
sum.addActionListener(new ActionListener(){
@Override public void actionPerformed(ActionEvent arg0){
display.setText(Double.toString(calculator.getSum()));
}
});
sum.setBounds(73, 16, 65, 23);
functionPanel.add(sum);
mean = new JButton("Mean");
mean.addActionListener(new ActionListener(){
@Override public void actionPerformed(ActionEvent arg0){
display.setText(Double.toString(calculator.getMean()));
}
});
mean.setBounds(140, 16, 65, 23);
functionPanel.add(mean);
max = new JButton("Maximum");
max.addActionListener(new ActionListener(){
@Override public void actionPerformed(ActionEvent arg0){
display.setText(Double.toString(calculator.getMax()));
}
});
max.setBounds(10, 49, 89, 23);
functionPanel.add(max);
min = new JButton("Minimum");
min.addActionListener(new ActionListener(){
@Override public void actionPerformed(ActionEvent arg0){
display.setText(Double.toString(calculator.getMin()));
}
});
min.setBounds(111, 49, 89, 23);
functionPanel.add(min);
standardDeviation = new JButton("Standard Deviation");
standardDeviation.addActionListener(new ActionListener(){
@Override public void actionPerformed(ActionEvent arg0){
display.setText(Double.toString(calculator.getStandardDeviation()));
}
});
standardDeviation.setBounds(33, 83, 147, 23);
functionPanel.add(standardDeviation);
}
}
これに関連する他のすべてのクラスは正しく機能しており、他のボタンのリスナーも正しく機能しています。