Java swing programming primer code writing of Java programming primer
- 2020-04-01 02:39:05
- OfStack
The basic flow of Swing programming
Step 1: get the main form
JFrame jf = new JFrame("Demo1");
Step 2: get the container for the main form
Container c = jf.getContentPane();
Step 3: set the container layout
c.setLayout(new FlowLayout(FlowLayout.LEFT,20,20));
Step 4: add components and set their properties
JLabel label1 = new JLabel("Hello World!");
JLabel label2 = new JLabel("Bye World!");
label1.setBackground(Color.BLUE);
label1.setOpaque(true);
Step 5: set the properties of the form, close the main form, and exit the program
jf.setSize(200, 100); //Sets the size of the main form
jf.setVisible(true);
jf.setResizable(false);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//Exit the program when the form is set to close
The other:
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); You can also use the following code instead
jf.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
super.windowClosing(e);
System.exit(0);
}
});
3. Personal learning experience:
* learn Swing, make simple small software, is not difficult, want to do good, you need to have a deeper study of the layout!
* one use for using Swing: although it's a bit outdated, Swing can be used for gadgets, support work, and entertainment. I'm interested in computer graphics.
*Swing components use some design patterns, is quite worth studying, quite useful for programming!
* learning things is important to adhere to, many toolkits are similar, to one kind of profound, others can also analogy!
4. Attached is a Swing program you learned about in the youtube video:
package com.ting723.www;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Demo10XOGame extends JFrame{
JPanel jp = new JPanel();
public Demo10XOGame() {
Container c = this.getContentPane();
c.add(jp);
jp.setLayout(new GridLayout(3, 3));
for (int i = 0; i < 9; i++) {
XOButton jb = new XOButton();
jp.add(jb);
}
this.setSize(500, 500);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setLocationRelativeTo(null);
this.setVisible(true);
}
public static void main(String[] args) {
new Demo10XOGame();
}
}
class XOButton extends JButton implements ActionListener {
private ImageIcon X, O;
byte value = 0;
public XOButton() {
X = new ImageIcon(this.getClass().getResource("x.png"));
O = new ImageIcon(this.getClass().getResource("o.png"));
this.addActionListener(this);
}
@Override
public void actionPerformed(ActionEvent e) {
value++;
value %= 3;
switch (value) {
case 0:
setIcon(null);
break;
case 1:
setIcon(X);
break;
case 2:
setIcon(O);
}
}
}