Java自定義控件的呈現方式與GUI設計器中的呈現方式不同

Question

我有一個已創建的自定義控件。 它可以正常運行，但是呈現不正確。

可以看出，設計師（netbeans）使所有內容保持整齊。 但是，在正在運行的程序中有空格，並且按鈕上的文本不顯示。

這是代碼。

public class AllocateSpinner extends javax.swing.JPanel {

  /**
   * Creates new form AllocateSpinner
   */
  public AllocateSpinner() {
    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() {

    Min = new java.awt.Button();
    Decrement = new java.awt.Button();
    NumberEdit = new javax.swing.JTextField();
    Increment = new java.awt.Button();
    Max = new java.awt.Button();

    setMinimumSize(new java.awt.Dimension(100, 23));
    setPreferredSize(new java.awt.Dimension(100, 23));
    setLayout(new javax.swing.BoxLayout(this, javax.swing.BoxLayout.X_AXIS));

    Min.setFont(new java.awt.Font("Dialog", 0, 10)); // NOI18N
    Min.setLabel("|<");
    Min.setMaximumSize(new java.awt.Dimension(15, 32767));
    Min.setMinimumSize(new java.awt.Dimension(15, 23));
    Min.setPreferredSize(new java.awt.Dimension(15, 23));
    Min.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        MinActionPerformed(evt);
      }
    });
    add(Min);

    Decrement.setFont(new java.awt.Font("Dialog", 0, 10)); // NOI18N
    Decrement.setLabel("<<");
    Decrement.setMaximumSize(new java.awt.Dimension(15, 32767));
    Decrement.setMinimumSize(new java.awt.Dimension(15, 23));
    Decrement.setPreferredSize(new java.awt.Dimension(15, 23));
    Decrement.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        DecrementActionPerformed(evt);
      }
    });
    add(Decrement);

    NumberEdit.setText("0");
    NumberEdit.setMinimumSize(new java.awt.Dimension(20, 23));
    NumberEdit.setPreferredSize(new java.awt.Dimension(20, 23));
    NumberEdit.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        NumberEditActionPerformed(evt);
      }
    });
    add(NumberEdit);

    Increment.setFont(new java.awt.Font("Dialog", 0, 10)); // NOI18N
    Increment.setLabel(">>");
    Increment.setMaximumSize(new java.awt.Dimension(15, 32767));
    Increment.setMinimumSize(new java.awt.Dimension(15, 23));
    Increment.setPreferredSize(new java.awt.Dimension(15, 23));
    Increment.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        IncrementActionPerformed(evt);
      }
    });
    add(Increment);

    Max.setFont(new java.awt.Font("Dialog", 0, 10)); // NOI18N
    Max.setLabel(">|");
    Max.setMaximumSize(new java.awt.Dimension(15, 32767));
    Max.setMinimumSize(new java.awt.Dimension(15, 23));
    Max.setPreferredSize(new java.awt.Dimension(15, 23));
    Max.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        MaxActionPerformed(evt);
      }
    });
    add(Max);
  }// </editor-fold>                        

  private void MinActionPerformed(java.awt.event.ActionEvent evt) {                                    
    setValue(_MinValue);
  }                                   

  private void DecrementActionPerformed(java.awt.event.ActionEvent evt) {                                          
    setValue(_Value - _ValueStep);
  }                                         

  private void IncrementActionPerformed(java.awt.event.ActionEvent evt) {                                          
    setValue(_Value + _ValueStep);
  }                                         

  private void MaxActionPerformed(java.awt.event.ActionEvent evt) {                                    
    setValue(_MaxValue);
  }                                   

  private void NumberEditActionPerformed(java.awt.event.ActionEvent evt) {                                           
    try {
      setValue(Integer.parseInt(NumberEdit.getText()));
    } catch (NumberFormatException e) {
      NumberEdit.setText(_Formatter.format(_Value));
    }
  }                                          

  // Variables declaration - do not modify                     
  private java.awt.Button Decrement;
  private java.awt.Button Increment;
  private java.awt.Button Max;
  private java.awt.Button Min;
  private javax.swing.JTextField NumberEdit;
  // End of variables declaration                   

  private int _Value = 0;
  private int _MinValue = 0;
  private int _MaxValue = 100;
  private int _ValueStep = 1;
  private NumberFormat _Formatter = NumberFormat.getIntegerInstance();

  /**
   * Sets the value. If the value is less than MinValue or greater than MaxValue the value is set to the limit.
   * @param value The value to set.
   */
  public void setValue(int value) {
    if (_Value != value) {
      int ov = _Value;
      value = Math.max(_MinValue, value);
      value = Math.min(_MaxValue, value);
      _Value = value;
      NumberEdit.setText(_Formatter.format(_Value));
      firePropertyChange("Value", ov, _Value);
    }
  }

  /**
   * Get the current value.
   * @return The current value.
   */
  public int getValue() {
    return _Value;
  }

  /**
   * Sets the minimum value. If the current value is less than the new minimum value the current value is set to minimum.
   * @param value The new minimum value to set.
   */
  public void setMinValue(int value) {
    if (_MinValue != value) {
      int ov = _MinValue;
      value = Math.min(_MaxValue, value);
      _MinValue = value;
      firePropertyChange("MinValue", ov, _MinValue);
      if (_Value < _MinValue) {
        setValue(_MinValue);
      }
    }
  }

  /**
   * Get the minimum value that can be set.
   * @return The minimum value.
   */
  public int getMinValue() {
    return _MinValue;
  }

  /**
   * Set the maximum value. If the current value is greater than the new maximum the current value is set to maximum.
   * @param value The new Maximum value.
   */
  public void setMaxValue(int value) {
    if (_MaxValue != value) {
      int ov = _MaxValue;
      value = Math.max(_MinValue, value);
      _MaxValue = value;
      firePropertyChange("MaxValue", ov, _MaxValue);
      if (_Value > _MaxValue) {
        setValue(_MaxValue);
      }
    }
  }

  /**
   * Get the maximum value that can be set.
   * @return The maximum value.
   */
  public int getMaxValue() {
    return _MaxValue;
  }

  /**
   * Set the amount that the number will be changed on increment or decrement operations.
   * @param value The step amount.
   */
  public void setValueStep(int value) {
    if (_ValueStep != value) {
      int ov = _ValueStep;
      _ValueStep = value;
      firePropertyChange("ValueStep", ov, _ValueStep);
    }
  }

  /**
   * Get the amount that the value changes on increment or decrement operations.
   * @return The step amount.
   */
  public int getValueStep() {
    return _ValueStep;
  }

  /**
   * Set the number formatter to use.
   * @param formater The formatter to use.
   */
  public void setFormatter(NumberFormat formater) {
    if (_Formatter != formater) {
      NumberFormat of = _Formatter;
      _Formatter = formater;
      NumberEdit.setText(_Formatter.format(_Value));
      this.firePropertyChange("Formatter", of, _Formatter);
    }
  }

  /**
   * Get the formatter currently being used.
   * @return The NumberFormat currently being used.
   */
  public NumberFormat getFormatter() {
    return _Formatter;
  }
}

Answer 1

評論“您的按鈕是awt按鈕，而不是擺動JButton”，隨后從Button到JButton的調整似乎已經解決了此問題。