如何制作AWT Button()和使用ImageIcon()， Icon()

Question

如何将GIF图像应用于AWT Button ?

AWT: does not work

    Icon warnIcon = new ImageIcon("/src/world.gif");
    Button button1 = new Button(warnIcon);
    Icon warnIcon = new ImageIcon("/src/world.gif");
    JButton button1 = new JButton(warnIcon);

Answer 1

AWT与Swing有点不同。

没有构造器button(image)，因此你的"不工作"。

查看了解如何使用自己的图像按钮扩展AWT 以了解如何在AWT按钮上创建该图像。

Answer 2

回到你的三天历史，请尝试在你的本机操作系统上运行下面的代码，并使用OpenJDK(也许真的是时候从Oracle下载一个稳定的JDK了，你只能在项目属性中切换它):

1. 从NetBeans运行

2. 编译成JAR文件或类

   import java.awt.event.*;
   import java.awt.Color;
   import java.awt.AlphaComposite;
   import javax.swing.*;
   import javax.swing.UIManager.LookAndFeelInfo;
   public class ButtonTest {
       public static void main(String[] args) {
           SwingUtilities.invokeLater(new Runnable() {
               @Override
               public void run() {
                   new ButtonTest().createAndShowGUI();
               }
           });
       }
       private JFrame frame;
       private JButton opaqueButton1;
       private JButton opaqueButton2;
       private SoftJButton softButton1;
       private SoftJButton softButton2;
       public void createAndShowGUI() {
           opaqueButton1 = new JButton("Opaque Button");
           opaqueButton2 = new JButton("Opaque Button");
           softButton1 = new SoftJButton("Transparent Button");
           softButton2 = new SoftJButton("Transparent Button");
           opaqueButton1.setBackground(Color.GREEN);
           softButton1.setBackground(Color.GREEN);
           frame = new JFrame();
           frame.getContentPane().setLayout(new java.awt.GridLayout(2, 2, 10, 10));
           frame.add(opaqueButton1);
           frame.add(softButton1);
           frame.add(opaqueButton2);
           frame.add(softButton2);
           frame.setSize(567, 350);
           frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
           frame.setVisible(true);
           Timer alphaChanger = new Timer(30, new ActionListener() {
               private float incrementer = -.03f;
               @Override
               public void actionPerformed(ActionEvent e) {
                   float newAlpha = softButton1.getAlpha() + incrementer;
                   if (newAlpha < 0) {
                       newAlpha = 0;
                       incrementer = -incrementer;
                   } else if (newAlpha > 1f) {
                       newAlpha = 1f;
                       incrementer = -incrementer;
                   }
                   softButton1.setAlpha(newAlpha);
                   softButton2.setAlpha(newAlpha);
               }
           });
           alphaChanger.start();
           Timer uiChanger = new Timer(3500, new ActionListener() {
               private LookAndFeelInfo[] laf = UIManager.getInstalledLookAndFeels();
               private int index = 1;
               @Override
               public void actionPerformed(ActionEvent e) {
                   try {
                       UIManager.setLookAndFeel(laf[index].getClassName());
                       SwingUtilities.updateComponentTreeUI(frame);
                   } catch (Exception exc) {
                       exc.printStackTrace();
                   }
                   index = (index + 1) % laf.length;
               }
           });
           uiChanger.start();
       }
       public static class SoftJButton extends JButton {
           private static final JButton lafDeterminer = new JButton();
           private static final long serialVersionUID = 1L;
           private boolean rectangularLAF;
           private float alpha = 1f;
           public SoftJButton() {
               this(null, null);
           }
           public SoftJButton(String text) {
               this(text, null);
           }
           public SoftJButton(String text, Icon icon) {
               super(text, icon);
               setOpaque(false);
               setFocusPainted(false);
           }
           public float getAlpha() {
               return alpha;
           }
           public void setAlpha(float alpha) {
               this.alpha = alpha;
               repaint();
           }
           @Override
           public void paintComponent(java.awt.Graphics g) {
               java.awt.Graphics2D g2 = (java.awt.Graphics2D) g;
               g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha));
               if (rectangularLAF && isBackgroundSet()) {
                   Color c = getBackground();
                   g2.setColor(c);
                   g.fillRect(0, 0, getWidth(), getHeight());
               }
               super.paintComponent(g2);
           }
           @Override
           public void updateUI() {
               super.updateUI();
               lafDeterminer.updateUI();
               rectangularLAF = lafDeterminer.isOpaque();
           }
       }
   }