По дебаггеру, сначала запускается:
new RunnableImpl
new DecoratorMyRunnableImpl
new DecoratorRunnableImpl
а вывод:
DecoratorRunnableImpl body 1 DecoratorMyRunnableImpl body 2 RunnableImpl body 3
Почему так?
public class Solution {
public static void main(String[] args) {
new Thread(new DecoratorRunnableImpl(new DecoratorMyRunnableImpl(new RunnableImpl()))).start();
}
public static class RunnableImpl implements Runnable {
@Override
public void run() {
System.out.println("RunnableImpl body 3 ");
}
}
public static class DecoratorRunnableImpl implements Runnable {
private Runnable component;
public DecoratorRunnableImpl(Runnable component) {
this.component = component;
}
@Override
public void run() {
System.out.print("DecoratorRunnableImpl body 1 ");
component.run();
}
}
public static class DecoratorMyRunnableImpl implements Runnable {
private Runnable component;
public DecoratorMyRunnableImpl(Runnable component) {
this.component = component;
}
@Override
public void run() {
System.out.print("DecoratorMyRunnableImpl body 2 ");
component.run();
}
}
}