java swing 基础

1.一个只有一个lable的界面

import javax.swing.JFrame;

import javax.swing.JLabel;



public class reading extends JFrame    

{

    public static void main(String[] args)

    {

        new reading();

    }

    reading() {

        JLabel jlbHelloWorld = new JLabel("Hello World");

        add(jlbHelloWorld);

        this.setSize(100, 100);

        setVisible(true);

    }

}http://www.javabeginner.com/java-swing/java-swing-tutorial