java - What is the prefered method for opening starting a swing interface and what's difference? -

this question has answer here:

• extends jframe vs. creating inside program 6 answers

so i've found multiple ways of implementing swing gui in java don't know each , teacher isn't able me. 1 method of creating jframe is:

import javax.swing.*; import java.awt.*;  public class ui extends jframe{      public ui() {          initalisegui();     }      private void initalisegui(){         settitle("my title");         setbackground(color.red);         setsize(800,500);         setlocationrelativeto(null);         setdefaultcloseoperation(exit_on_close);    } public static void main(string[] args){     eventqueue.invokelater(new runnable(){          @override         public void run(){             ui m = new ui();             m.setvisible(true);          }        });  } 

but way of implementing is:

import javax.swing.*; import java.awt.*; public class main{     public static void main(string[] args){          jframe window = new jframe();         window.setsize(500,500);         window.setdefaultcloseoperation(jframe.exit_on_close);          container c = window.getcontentpane();         c.setbackground(color.red);          window.setbackground(color.red);                 window.settitle("main");         jlabel message = new jlabel("jlabel");         window.add(message);         window.setvisible(true);     } } 

what difference between how each 1 works , when should use 1 on other , how runnable work in context?

thankyou!

your first example calls eventqueue invokelater method, extends jframe.

your second example puts in static method main, , doesn't run invokelater method.

here's 1 way start swing application.

public class tryingproject2 implements runnable {      public static void main(string[] args) {         swingutilities.invokelater(new tryingproject2());     }      @override     public void run() {         jframe frame = new jframe("color gradient test");         frame.setdefaultcloseoperation(jframe.exit_on_close);          frame.add(createmainpanel());         frame.pack();         frame.setlocationbyplatform(true);         frame.setvisible(true);     }      private jpanel createmainpanel() {         jpanel panel = new jpanel();         // add swing components here         return panel;     } } 

i don't extends swing components. use swing components. time extend swing component, or java class, when want override 1 of class methods.

the swingutilities invokelater method same eventqueue invokelater method. method puts creation , updates of swing components on event dispatch thread.

i implement runnable because makes invokelater method parameter instance of class.

i create main panel in method keep jframe code separate jpanel(s) code.