Java prog#8. How to close previous jframe on the opening of new jframe in netbeans

it's simple just follow the below code:
First import these two files below
import java.awt.event.*;
import java.awt.*;


then write the method for close

public void close(){

WindowEvent winClosingEvent = new WindowEvent(this,WindowEvent.WINDOW_CLOSING);
Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(winClosingEvent);

}



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