如何在多个JFrame之间保留背景色

Question

Within my program I have a method to change the frame colours. I also have a method to open a new Jframe which is used as a settings menu for the app. However the values set in the initial jframe will not carry over.

How may I preserve the colours set in the initial Jframe and have them load into the settings object as it is created ?

Answer 1

Add a constructor to your new JFrame with a Color parameter and set the background color after you called the default constructor.

public SecondJFrame(Color c)
{
    this();
    this.getContentPane().setBackground(c);
}

Another way is to set the background color after you initialized your second JFrame in your initial JFrame :

SecondJFrame secondJFrame = new SecondJFrame();
secondJFrame.getContentPane().setBackground(this.getContentPane().getBackground());
secondJFrame.setVisible(true);

Answer 2

user singlton design pattern add to it the Setting class you have as follow

public class SettingManager{
     private static YourSettingClass setting = null ; 
     private SettingManager(){}
     public static YouSettingClass getSetting(){
              if(setting==null){
                 setting = new YourSettingClass(); 
                 return setting; 
              }
         return setting ; 
     }
     // any utility method to change your setting will be here 

}

in each JFrame Constructor you can get the setting which is now global for the application

YourSettingClass setting = SettingManager.getSetting() ;