java - 如何在不同的类中访问此关键字

Question

尝试使用 Java 编程在不同的类中访问此关键字时遇到问题。我已经尝试过 Context、class.this 但还没有帮助...

我已经使用 NetBeans gui 构建器创建了一个项目，我希望当我单击按钮时表单得到处理...

主类包含处理JFrame Form的点击事件 BestQSystems.java:

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
          CloseWindow.closeWindow(); 

   }  

关闭JFrame的类:CloseWindow.java

import java.awt.Toolkit;
import java.awt.event.WindowEvent;
import javax.naming.Context;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author Benson
 */
public class CloseWindow {
    public  static void closeWindow(){
        WindowEvent widnowEvent = new WindowEvent(this, WindowEvent.WINDOW_CLOSING);
        Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(widnowEvent);
    }
}

此行有错误 WindowEvent widnowEvent = new WindowEvent(this, WindowEvent.WINDOW_CLOSING); 请告诉我如何在不同的类中访问 this 关键字.

Answer 1

您可以将对 this 的引用传递给其他方法。例如:

BestQSystems.java

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
      CloseWindow.closeWindow(this); 
}

和 CloseWindow.java 中

public class CloseWindow {
    public  static void closeWindow(BestQSystems ref){
        WindowEvent widnowEvent = new WindowEvent(ref, WindowEvent.WINDOW_CLOSING);
    }
}