java 如何从 JFrame 中删除 JButton？

How can I remove JButton from JFrame?

提问by Won Seok Lee

I want to remove JButtonwhen user click JButton.

我想JButton在用户单击时删除JButton。

I know that I should use remove method, but it did not work.

我知道我应该使用 remove 方法，但它没有用。

How can I do this?

我怎样才能做到这一点？

Here is my code:

这是我的代码：

class Game implements ActionListener {

JFrame gameFrame;
JButton tmpButton;
JLabel tmpLabel1, tmpLabel2, tmpLabel3, tmpLabel4;

public void actionPerformed(ActionEvent e) {
    gameFrame.remove(tmpLabel1);
    gameFrame.getContentPane().validate();
    return;
}

Game(String title) {
    gameFrame = new JFrame(title);
    gameFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    gameFrame.setBounds(100, 100, 300, 500);
    gameFrame.setResizable(false);
    gameFrame.getContentPane().setLayout(null);

    tmpLabel4 = new JLabel(new ImageIcon("./images/bomber.jpg"));
    tmpLabel4.setSize(200, 200);
    tmpLabel4.setLocation(50, 100);
    tmpButton = new JButton("Play");
    tmpButton.setSize(100, 50);
    tmpButton.setLocation(100, 350);
    tmpButton.addActionListener(this);

    gameFrame.getContentPane().add(tmpLabel4);
    gameFrame.getContentPane().add(tmpButton);
    gameFrame.setVisible(true);
}
}

回答by hermit

If hiding the button instead of removing works for your code then you can use:

如果隐藏按钮而不是删除代码的作品，那么您可以使用：

public void actionPerformed(ActionEvent event){
   tmpButton.setVisible(false);
 }

for the button.But the button is just hidden not removed.

按钮。但按钮只是隐藏而不是删除。

回答by MadProgrammer

The simplest solution might be to...

最简单的解决方案可能是...

• Attach an ActionListenerto the button, see How to Use Buttons, Check Boxes, and Radio Buttonsand How to Write an Action Listenersfor more details
• When the ActionListeneris clicked, extract the source of the event, JButton buttonThatWasClicked = (JButton)actionEvent.getSource()
• Remove it from it's parent...

• 将 an 附加ActionListener到按钮，请参阅如何使用按钮、复选框和单选按钮以及如何编写操作侦听器以获取更多详细信息
• 当ActionListener被点击时，提取事件的源，JButton buttonThatWasClicked = (JButton)actionEvent.getSource()
• 从它的父级中删除它...

For example...

例如...

Container parent = buttonThatWasClicked.getParent();
parent.remove(buttonThatWasClicked);
parent.revaidate();
parent.repaint();

As some ideas...

作为一些想法...

回答by varun

First of all in your actionPerformed method you need to check that the button is clicked or not. And if the button is clicked, remove it. Here's how :

首先，在您的 actionPerformed 方法中，您需要检查按钮是否被点击。如果单击该按钮，请将其删除。就是这样 ：

if(e.getSource() == tmpButton){
   gameFrame.getContentPane().remove(tmpButton);
}

add this to your actionPerformed Method

将此添加到您的 actionPerformed 方法中

回答by Mohammadreza Khatami

don't add your button to jframe but add each component you want!

不要将您的按钮添加到 jframe，而是添加您想要的每个组件！

public void actionPerformed(ActionEvent event)
{
   //gameFrame.getContentPane().add(tmpButton); -=> "Commented Area"
   gameFrame.getContentPane().validate();
}

or hide your button like this

或者像这样隐藏你的按钮

public void actionPerformed(ActionEvent event)
{
   tmpButton.setVisible(false);
}