单一线程规则,不要在自己的线程中触摸swing组件
发布时间:2020-05-23 13:01:24 所属栏目:程序设计 来源:互联网
导读:class SwingThreadFrame extends JFrame {public SwingThreadFrame() {setTitle(Swing Thread);final JComboBoxInteger combo = new JComboBoxInteger();combo.insertItemAt(Integer.MAX_V
class SwingThreadFrame extends JFrame { public SwingThreadFrame() { setTitle("Swing Thread"); final JComboBox<Integer> combo = new JComboBox<Integer>(); combo.insertItemAt(Integer.MAX_VALUE,0); combo.setPrototypeDisplayValue(combo.getItemAt(0)); combo.setSelectedIndex(0); JPanel panel = new JPanel(); JButton goodButton = new JButton("Good"); goodButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent event) { new Thread(new GoodWorkerRunnable(combo)).start(); } }); panel.add(goodButton); JButton badButton = new JButton("Bad"); badButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent event) { new Thread(new BadWorkerRunnable(combo)).start(); } }); panel.add(badButton); panel.add(combo); add(panel); pack(); } } class GoodWorkerRunnable implements Runnable { public GoodWorkerRunnable(JComboBox<Integer> combo) { this.combo = combo; generator = new Random(); } @Override public void run() { try { while(true) { EventQueue.invokeLater(new Runnable() { @Override public void run() { int i = Math.abs(generator.nextInt()); if(i % 2 == 0) { combo.insertItemAt(i,0); } else if(combo.getItemCount() > 0) { combo.removeItemAt(i % combo.getItemCount()); } } }); Thread.sleep(1); } } catch (InterruptedException e) { } } private JComboBox<Integer> combo; private Random generator; }class BadWorkerRunnable implements Runnable { public BadWorkerRunnable(JComboBox<Integer> combo) { this.combo = combo; generator = new Random(); } @Override public void run() { try { while(true) { int i = Math.abs(generator.nextInt()); if(i % 2 == 0) { combo.insertItemAt(i,0); } else if(combo.getItemCount() > 0) { combo.removeItemAt(i % combo.getItemCount()); } Thread.sleep(1); } } catch (InterruptedException e) { } } private JComboBox<Integer> combo; private Random generator; } (编辑:安卓应用网) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |