java按键事件怎么执行两次_java一个按钮重复调用，按一次执行代码一次，按第二次，它执行两次，按第三次，执行了三次。。。...

bn5.addActionListener(newActionListener(){@OverridepublicvoidactionPerformed(ActionEvente3){Stringstr1=tf4.getText();Stringstr2=tf5.getText();if(0!=str1.length()&&0!=str2...

bn5.addActionListener(

new ActionListener()

{

@Override

public void actionPerformed(ActionEvent e3)

{

String str1 = tf4.getText();

String str2 = tf5.getText();

if(0!=str1.length() && 0!=str2.length())

{

try

{

br3 = new BufferedWriter(new FileWriter("C:\Documents and Settings\Administrator\桌面\new folder\帐户存储\zh.txt"));

br4 = new BufferedWriter(new FileWriter("C:\Documents and Settings\Administrator\桌面\new folder\帐户存储\mm.txt"));

br3.write(tf4.getText(), 0, tf4.getText().length());

br4.write(tf5.getText(), 0, tf5.getText().length());

br3.flush();

br4.flush();

br3.close();

br4.close();

}

catch(Exception e4)

{

}

finally

{

tf4.setText("");

tf5.setText("");

f2.setVisible(false);

JOptionPane.showMessageDialog(f2, "修改成功！");

}

}

else

{

JOptionPane.showMessageDialog(f2, "用户名密码不能为空！");

}

}

}

);

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