/**
 *
 * @author yaoyuan
 */


13 public class Pass{
14  public static void main(String[] args){
15   int x = 5;
16   Pass p = new Pass();
17   p.doStuff(x);
18   System.out.println("main x = " + x);
19  }
20  
21  void doStuff(int x){
22   System.out.print("doStuff x=" + x++);
23  }
24 }

 /**
 *
 * @author yaoyuan
 */


11 class A{
12  public void process(){System.out.print("A");}}
13 class B extends A{
14  public void process() throw IOException{
15   super.process();
16   System.out.print("B");
17   throw new IOException();
18 }}
19 public static void main(String[] args){
20  try{new B().process();}
21  catch(IOException e){System.out.println("Exception");}}

 /**
 *
 * @author yaoyuan
 */

public class Test{
 public enum Dogs{collie,harrier,shepherd};
 public static void main(String[] args){
  Dogs myDog = Dogs.shepherd;
  switch(myDog){
   case collie:
    System.out.print("collie");
   case default:
    System.out.print("retriever");
   case harrier:
    System.out.print("harrier");
  }
 }
}

 /**
 *
 * @author yaoyuan
 */

public static Collection get(){
 Collection sorted = new LinkedList();
 sorted.add("B");
 sorted.add("C");
 sorted.add("A");
 return sorted;
}

public static void main(String[] args){
 for(Object obj:get()){
  System.out.print(obj + ", ");
 }
}

 /**
 *
 * @author yaoyuan
 */


static void test() throws Error{
 if(true) throw new AssertionError();
 System.out.print("test");
}

public static void main(String[] args){
 try{test();}
 catch(Exception ex){System.out.print("exception");}
 System.out.println("end");
}

 /**
 *
 * @author yaoyuan
 */


Float pi = new Float(3.14f);
if(pi > 3){
 System.out.print("pi is bigger than 3.");
}
else{
 System.out.print("pi is not bigger than 3");
}
finally{
 System.out.print("Have a nice day.");
}

 /**
 *
 * @author yaoyuan
 */

10 interface Foo{}
11 class Alpha implements Alpha{}
12 class Beta extends Beta{}
13 class Delta extends Beta{
14  public static void main(String[] args){
15   Beta x= new Beta();
16   //insert code here
17  }
18 }

11 public void someMethod(Object value)
12  //check for null value
.............
20 System.out.println(value.getClass());
21 }