Java implementation Stack Overflow, heap overflow, out-of-heap memory example

• Idea VM parameter settings

　　

• Stack overflow (in fact, recursive call is not finished)
  

     Public  static  void  StackOverflow () {             stackoverflow ();    }

• Heap Overflow
  

     Static class testbean{}    /**     *     heap overflow Java heap space */public  static  void   outOfMemory () {        try {            while (true) {                list.add (new Testbean ())}        } Catch (Exception e) {System.out.println (e);}}     

• Run is a constant exception
  

    Static  List  arraylist=new arrayList ();    Public  static  void    Outofmemorypremgen () {        int i=0;        while (True) {            list.add (string.valueof (i++). Intern ())}    }    

• Unsafe allocates out-of-heap memory (This is how Java NiO is implemented)

  Unsafe allocates memory    private static final unsafe unsafe = unsafe.getunsafe ();    Private  final  static  int size=1024*1024;    Public  static   void getsysemmory () {        while (true) {            unsafe.allocatememory (size);        }    } 

Java implementation Stack Overflow, heap overflow, out-of-heap memory example