1 final ：
2 interfaces:
The meaning of the interface is to separate the design and implementation, and the specific details are designed for subsequent people to implement.
Java is suitable for large-scale software, and requires the cooperation of many people before the appearance of the interface.
3 callback functions :
Callback function - hook function:
xxxxx
yyyy
---- ?? Not sure how to do it, let others do it, then stick out a hook, others put beef is beef, put pork is pork,
mmmm
zzzz
Code:
public abstract class MyFrame {
public void paint() {
System.out.println("i am MyFrame");
}
}
public class PaintFrame {
/**
* @param args
*/
public static void main(String[] args) {
MyFrame2 myFrame2 = new MyFrame2();
drawFrame(myFrame2); // the caller decides what type of meat to attach to the hook
/* start the thread
add loop
View messages
from MyFrame2, draw a new bird picture
start cache */
}
public static void drawFrame(MyFrame myFrame) {
System.out.println("Start thread");
System.out.println("Increase loop");
System.out.println("View message");
// The hook is the specific usage scenario of the polypeptide. I don't know how to do it here. I will give the specific method to the caller. The caller attaches beef to the hook, which is beef and pork.
myFrame.paint();
System.out.println("Start cache");
}
}
class MyFrame1 extends MyFrame {
@Override
public void paint() {
System.out.println("from MyFrame1, draw a new dog picture");
}
}
class MyFrame2 extends MyFrame {
@Override
public void paint() {
System.out.println("from MyFrame2, draw a new bird picture");
}
}
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