無法格式化GUI /添加動作偵聽器

Question

我已經通過本網站和通過Java網站搜索得很遠，試圖找出答案，但我找不到具體到我的問題的答案。

我不知道把我的動作監聽器放在b1和b2的哪個位置，我也認爲我正在使用的方法可能有問題（儘管代碼仍然編譯並運行，並且沒有任何操作監聽器。）

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 

public class CubeCalc { 

    public static void MakeTitlePage() 
    { 
     JButton b1 = new JButton("Start"); 
     b1.setBackground(Color.decode("#5A20DF")); 
     b1.setForeground(Color.WHITE); 
     b1.setLayout(new GridBagLayout()); 
     b1.setPreferredSize(new Dimension(150,50)); 

     JButton b2 = new JButton("Information about the Developer"); 
     b2.setBackground(Color.decode("#23D123")); 
     b2.setForeground(Color.BLACK); 
     b2.setLayout(new GridBagLayout()); 
     b2.setPreferredSize(new Dimension(275,50)); 

     GridBagConstraints blo = new GridBagConstraints(); 
     blo.fill = GridBagConstraints.HORIZONTAL; 
     blo.gridx = 0; 
     blo.gridy = 1; 
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -// 
     JPanel start = new JPanel(new GridBagLayout()); 
     start.setBackground(Color.BLACK); 
     start.setPreferredSize(new Dimension(300,100)); 
     start.add(b1, blo); 

     JPanel info = new JPanel(new GridBagLayout()); 
     info.setBackground(Color.BLACK); 
     info.setPreferredSize(new Dimension(300,100)); 
     info.add(b2, blo); 
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -// 
     JFrame window = new JFrame("Cubic Feet Calculator"); //Creates Frame 
     window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

      /* window.add(new JLabel(new ImageIcon("Harold.jpg")));*/ 
       window.add(start, BorderLayout.NORTH); 
       window.add(info, BorderLayout.SOUTH); 

     window.pack(); //resizes to minimum possible frame size 
     //window.setSize(500,500); //Sets size of frame 
     window.setLocationRelativeTo(null); 
     window.setVisible(true); //Sets the frame to be visible 
     window.setResizable(true); 
     window.setBackground(Color.BLACK); 

//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -// 
    } 

    public static void main(String[] args) { 
     MakeTitlePage(); 
    } 
} 

我應該在哪裏加我ActionListener，是有什麼，我應該用我的方法做什麼？

Answer 1

評論：

• 的按鈕設置佈局沒有必要
• 使用添加ActionListener到按鈕addActionListener
• 使用Event Dispatch Thread發揮出色效果，使用從main啓動幀3210

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 

public class CubeCalc { 
    public static void MakeTitlePage() 
    { 
     final JFrame window = new JFrame("Cubic Feet Calculator"); // Creates Frame (created first so the button can reference it for JOptionPane 

     JButton b1 = new JButton("Start"); 
     b1.setBackground(Color.decode("#5A20DF")); 
     b1.setForeground(Color.WHITE); 
     //b1.setLayout(new GridBagLayout()); << unnecessary 
     b1.setPreferredSize(new Dimension(150,50)); 
     b1.addActionListener(new ActionListener() { // action when button is pressed 
      int pressCount=0; 
      @Override 
      public void actionPerformed(ActionEvent e) { 
       switch(++pressCount) { 
        case 1: JOptionPane.showMessageDialog(window, "Hey, stop pressing me!"); break; 
        case 2: JOptionPane.showMessageDialog(window, "I said, stop pressing me!!!!"); break; 
        default: JOptionPane.showMessageDialog(window, "Aaaaaaaaargl!!!!"); break; 
       } 
      } 
     }); 

     JButton b2 = new JButton("Information about the Developer"); 
     b2.setBackground(Color.decode("#23D123")); 
     b2.setForeground(Color.BLACK); 
     //b2.setLayout(new GridBagLayout()); << unnecessary 
     b2.setPreferredSize(new Dimension(275,50)); 
     b2.addActionListener(new ActionListener() { // action when button is pressed 
      int pressCount=0; 
      @Override 
      public void actionPerformed(ActionEvent e) { 
       switch(++pressCount) { 
        case 1: JOptionPane.showMessageDialog(window, "There is no information here!"); break; 
        case 2: JOptionPane.showMessageDialog(window, "Stop asking me for information!!!!"); break; 
        default: JOptionPane.showMessageDialog(window, "Aaaaaaaaargl!!!!"); break; 
       } 
      } 
     }); 

     GridBagConstraints blo = new GridBagConstraints(); 
     blo.fill = GridBagConstraints.HORIZONTAL; 
     blo.gridx = 0; 
     blo.gridy = 1; 
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -// 
     JPanel start = new JPanel(new GridBagLayout()); 
     start.setBackground(Color.BLACK); 
     start.setPreferredSize(new Dimension(300,100)); 
     start.add(b1, blo); 

     JPanel info = new JPanel(new GridBagLayout()); 
     info.setBackground(Color.BLACK); 
     info.setPreferredSize(new Dimension(300,100)); 
     info.add(b2, blo); 
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -// 
     window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

     /* window.add(new JLabel(new ImageIcon("Harold.jpg")));*/ 
     window.add(start, BorderLayout.NORTH); 
     window.add(info, BorderLayout.SOUTH); 

     window.setLocationRelativeTo(null); 
     window.setResizable(true); 
     window.setBackground(Color.BLACK); 
     window.pack(); //resizes to minimum possible frame size 
     window.setVisible(true); //Sets the frame to be visible 
    } 

    public static void main(String[] args) { 
     SwingUtilities.invokeLater(new Runnable() { // launch frame on the Event Dispatch Thread 
      @Override 
      public void run() { 
       MakeTitlePage(); 
      } 
     }); 
    } 
} 

效果：

Answer 2

您可以嘗試是這樣的：在片斷

b1.addActionListener(new ActionListener() { 

      public void actionPerformed(ActionEvent e) 
      { 
       // what do you want to execute... 

      } 
     });