如何在JPasswordField中启用剪切，复制？ [英] How do enable cut, copy in JPasswordField?

问题描述

我注意到我无法剪切并复制 JPasswordField ？现在如何将所选密码的部分复制/剪切到剪贴板？有没有方法可以做到这一点？

I noticed that i was unable to cut and copy in JPasswordField? Now how to copy/cut the selected part of the password to clipboard? Are there any methods to do this?

推荐答案

简单，使用此方法

JPasswordField jt=new JPasswordField(20);

            // Put client property
            jt.putClientProperty("JPasswordField.cutCopyAllowed",true);

            add(jt);

默认情况下， JPasswordField 中的密码不允许剪切/复制。你需要做的只是启用它们。

By default, the password in the JPasswordField is not allowed to be cut/copied. All you need to do is to enable them.

根据关于禁用粘贴的评论我没有找到属性，但我已经实现了使用它，（我不推荐这种方式）

As per the comment on disabling paste i didn't find a property, but i have achieved using this, (i dont recommend this way)

jt.getActionMap().put("a",null);
        jt.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("ctrl V"),"a");

另一种方法是覆盖 paste（）（我推荐这种方式），同时声明

Another way, is to do override the paste() (i recommend this way) while declaring

JPasswordField jt=new JPasswordField(20){
  public void paste(){}
};

更新：我误解了评论。但上面会禁用粘贴。但是，要禁用复制/剪切/粘贴中的任何一个，最好是要禁用所需的禁用方法而不执行任何实现。

Update: I misunderstood the comment. But the above does disabling paste. However to disable any one of the copy/cut/paste, it is better if the required method that is to be disabled is overrided with no implementation in it.

如果有是一个更好的方式，我很乐意听到。

If there is a much better way, i would love to hear.

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