详细分析Java内部类——局部内部类

public class Outer2 {
 public void print(){
  class Inner2{
   public void test(){
    System.out.println("Inner.print()");
   }
  }
  Inner2 inner2 = new Inner2();
  inner2.test();
 }
}

public class Test {
 public static void main(String[] args) {
  Outer2 outer2 = new Outer2();
  outer2.print();
 }
}

public class TimePrinter implements ActionListener {
 @Override
 public void actionPerformed(ActionEvent e) {
  Date now = new Date();
  System.out.println("Time is " + now + " now.");
 }
}

public class Test {
 public static void main(String[] args) {
  ActionListener listener = new TimePrinter();
  Timer t = new Timer(1000,listener);
  t.start();
  JOptionPane.showMessageDialog(null,"Quit program?");//弹出对话框，防止主线程结束导致时钟结束
  System.exit(0);
 }
}

public class Test {
 public static void main(String[] args) {
  class InnerTimePrinter implements ActionListener {
   @Override
   public void actionPerformed(ActionEvent e) {
    Date now = new Date();
    System.out.println("Time is " + now + " now.");
   }
  }
  ActionListener listener = new InnerTimePrinter();
  Timer t = new Timer(1000,listener);
  t.start();
  JOptionPane.showMessageDialog(null,"Quit?");
  System.exit(0);
 }
}