Java events

Question

I read the book "Learning java" and thought that I understood what was happening. But on the Internet I came across a lesson with events. Here is the code:

import java.awt.*; import java.applet.*; public class Focus extends Applet { String msg; public void init() { msg=""; Font font=new Font("TimesRoman",Font.BOLD,16); setFont(font); } public void paint(Graphics g) { g.drawString(msg,50,50); } public boolean gotFocus(Event evt, Object arg) { msg="Получен фокус"; repaint(); return true; } public boolean lostFocus(Event evt, Object arg) { msg="Фокус утерян"; repaint(); return true; } }

How it works? Where are the internal classes with implementations, where are the students? And in general, I was surprised how it started. Comrades, please explain!

This is not accidentally associated with the parent class, the class applet initially contains listeners?
Applets died about 10 years ago - they now have a very limited scope of use, so they didn’t start studying.

Gorets gorets 12k 1 golden mark 15 silver marks 41 bronze badge · Accepted Answer · 2013-03-17T19:57:05

 import java.awt.*; import java.applet.*; public class Focus extends Applet { String msg; //унаследовано от Applet public void init() { msg=""; Font font=new Font("TimesRoman",Font.BOLD,16); setFont(font); } //унаследовано от Applet, а он у java.awt.Component public void paint(Graphics g) { g.drawString(msg,50,50); } //унаследовано от Applet, а он у java.awt.Component public boolean gotFocus(Event evt, Object arg) { msg="Получен фокус"; repaint(); return true; } //унаследовано от Applet, а он у java.awt.Component public boolean lostFocus(Event evt, Object arg) { msg="Фокус утерян"; repaint(); return true; } }

it’s strange that you started java right from the applets, and not the PLO, everything there is swing ...

Java events

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