mainproxy.java

网络代理服务器的设计与实现 实现对网络的管理

import javax.swing.UIManager;
import java.awt.*;

public class mainProxy {
	
  boolean packFrame = false;

  //Construct the application
  public mainProxy() {
    loginFrame frame = new loginFrame();
    //Validate frames that have preset sizes
    //Pack frames that have useful preferred size info, e.g. from their layout
    if (packFrame) {
      frame.pack();
      /*java.awt.Window.pack() 这个API函数有什么作用?
  	为了适应窗体内部各组件大小以及布局而调整window自身大小
  	JFrame类好像也有，有了它就不用自己setSize()了
  	*/
    }
    else {
      frame.validate();
      //如果容器本身和它所包含的组件布局及其大小发生变化的化,调用该方法后能够使这种变化在界面上被反映出来,OK?
    }
    
    //Center the window
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
    frame.setVisible(true);
  }
  //Main method
  public static void main(String[] args) {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    new mainProxy();
  }
}