How does Java use Thread and Runnable threads

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Using Thread to realize multi-thread simulation of railway ticketing system

1 code

Public class ThreadDemo {public static void main (String [] args) {TestThread newTh = new TestThread (); / / A thread object can only start newTh.start ();}} class TestThread extends Thread {private int tickets = 5; public void run () {while (tickets > 0) {System.out.println (Thread.currentThread (). GetName () + "ticket for sale" + tickets); tickets-= 1 }}}

2 run

Thread-0 ticket 5Thread-0 ticket 4Thread-0 ticket 3Thread-0 ticket 2Thread-0 ticket 1Exception in thread "main" java.lang.IllegalThreadStateException at java.lang.Thread.start (Thread.java:708) at ThreadDemo.main (ThreadDemo.java:16)

3 description

A thread can only be started once

Four threads are generated in the two main method

1 code

Public class ThreadDemo {public static void main (String [] args) {/ / starts four threads to perform their respective operations new TestThread (). Start ();}} class TestThread extends Thread {private int tickets = 5 Public void run () {while (tickets > 0) {System.out.println (Thread.currentThread (). GetName () + "ticket for sale" + tickets); tickets-= 1;}

2 run

Thread-0 selling tickets 5Thread-0 selling tickets 4Thread-0 selling tickets 3Thread-0 selling tickets 2Thread-0 selling tickets 1Thread-1 selling tickets 5Thread-1 selling tickets 4Thread-1 selling tickets 3Thread-1 selling tickets 2Thread-1 selling tickets 1Thread-2 selling tickets 5Thread-2 selling tickets 3Thread-2 selling tickets 2Thread-2 selling tickets 1Thread-3 selling tickets 4Thread-3 selling tickets 3Thread-3 selling tickets 2Thread-3 selling tickets 1

Third, use Runnable interface to realize multithreading and resource sharing.

1 code

Public class RunnableDemo {public static void main (String [] args) {TestThread newTh = new TestThread (); / / started four threads and achieved the purpose of resource sharing: new Thread (newTh). Start ();} class TestThread implements Runnable {private int tickets = 5 Public void run () {while (tickets > 0) {System.out.println (Thread.currentThread (). GetName () + "ticket for sale" + tickets); tickets-= 1;}

2 run

Thread-0 ticket 5Thread-0 ticket 4Thread-0 ticket 3Thread-0 ticket 2Thread-0 ticket 1

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