弹出一个窗口 java

方法：将窗口设为可见即可！

代码如下：

public class duoChuangkou extends JFrame implements ActionListener{/** * @param args */JFrame frame=new JFrame("another");public static void main(String[] args) {// TODO Auto-generated method stubduoChuangkou a=new duoChuangkou();a.setVisible(true);a.setDefaultCloseOperation(EXIT_ON_CLOSE);}public duoChuangkou(){JButton button=new JButton("anotherWindow");button.addActionListener(this);getContentPane().add(button);setTitle("one");setSize(300, 200);}public void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubframe.setSize(300, 200);frame.setLocation(400, 0);frame.setVisible(true);}}