将参数传递给JButton ActionListener [英] Pass arguments into JButton ActionListener

问题描述

我正在寻找一种方法将变量或字符串或任何东西传递给JButton的匿名actionlistener（或显式actionlistener）。以下是我的内容：

I'm looking for a way to pass a variable or string or anything into an anonymous actionlistener ( or explicit actionlistener ) for a JButton. Here is what I have:

public class Tool {
...
  public static void addDialog() {
    JButton addButton = new JButton( "Add" );
    JTextField entry = new JTextField( "Entry Text", 20 );
    ...
    addButton.addActionListener( new ActionListener( ) {
      public void actionPerformed( ActionEvent e )
      {
        System.out.println( entry.getText() );
      }
    });
  ...
  }
}

现在我只是声明条目是一个全局变量，但我讨厌这样做的方法。还有更好的选择吗？

Right now I just declare entry to be a global variable, but I hate that way of making this work. Is there a better alternative?

推荐答案

1. 创建一个实现的类ActionListener interface。


2. 提供一个具有 JTextField 参数的构造函数。

1. Create a class that implements the ActionListener interface.
2. Provide a constructor that has a JTextField argument.

---

示例 -

---

Example -

class Foo implements ActionListener{
    private final JTextField textField;

    Foo(final JTextField textField){
        super();
        this.textField = textField;
    }
    .
    .
    .
}

---

问题？

---

Problem?

这篇关于将参数传递给JButton ActionListener的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！