Java multithreading and java threads

Java multithreading and java threads

Synchronization and deadlock of threads:

Public class Child {public void say () {System. out. println ("give me a toy, I will give you a transcript! ");} Public void get () {System. out. println (" the child gets the toy! ");}}

Public class Father {public void say () {System. out. println ("give me a transcript, I'll give you a toy! ");} Public void get () {System. out. println (" my father got the transcript! ");}}

public class DeadTreadDemo implements Runnable {    private static Father father = new Father();    private static Child child = new Child();        boolean flag = false;        public void run(){        if(flag){            synchronized(father){                father.say();                try{                    Thread.sleep(500);                } catch(Exception e){                    e.printStackTrace();                }                synchronized(child){                    father.get();                }            }        } else {            synchronized(child){                child.say();                try{                    Thread.sleep(500);                } catch(Exception e){                    e.printStackTrace();                }                synchronized(father){                    child.get();                }            }        }    }}

public class TestDt {    public static void main(String[] args) {        DeadTreadDemo dd1 = new DeadTreadDemo();        DeadTreadDemo dd2 = new DeadTreadDemo();                dd1.flag = true;        dd2.flag = false;                new Thread(dd1).start();        new Thread(dd2).start();            }}

Genie thread:

Public class RunnableDemo implements Runnable {private String name; private int ticket = 5; public RunnableDemo (String name) {this. name = name;} // The genie thread public void run () {for (int I = 1; I <= 5; I ++) {synchronized (this) {if (ticket> 0) {try {Thread. sleep (1000);} catch (Exception e) {e. printStackTrace ();} System. out. println (Thread. currentThread (). getName () + "ticket selling:" + ticket --) ;}// System. out. println (Thread. currentThread (). getName () + "running:" + I) ;}} public static void main (String [] args) {RunnableDemo rd1 = new RunnableDemo ("aaa "); new Thread (rd1 ). start (); new Thread (rd1 ). start ();}}