Java Thread

package day6.thread;

class Parent{

}

class MyThread2 extends Parent implements Runnable{

//상속중일때 Thread 구현하는 Runnable 인터페이스

public void run() {

for (int i = 0; i < 10; i++) {

try {

Thread.sleep((int)(Math.random()*1000));

} catch (InterruptedException e) {

e.printStackTrace();

}

System.out.println("C를 출력합니다.");

}

}

}

class MyThread extends Thread{

String name;

MyThread(String name){

this.name = name;

}

public void run() {

for (int i = 0; i < 10; i++) {

try {

sleep((int)(Math.random()*1000));

} catch (InterruptedException e) {

e.printStackTrace();

}

System.out.println(name + "A를 출력합니다.");

}

}

}

public class ThreadTest {

public static void main(String[] args) {

MyThread a = new MyThread("민철");

MyThread b = new MyThread("철민");

a.start();

try {

a.join();

} catch (InterruptedException e1) {

e1.printStackTrace();

}

b.start();

//Runable 인터페이스 사용할 때 선언

MyThread2 r = new MyThread2();

Thread c = new Thread(r);

c.start();

for (int i = 0; i < 10; i++) {

try {

Thread.sleep((int)(Math.random()*1000));

} catch (InterruptedException e) {

e.printStackTrace();

}

System.out.println("B를 출력합니다.");

}

}

}

package day6.thread;

class BathRoomThread extends Thread{

BathRoom room;

String name;

BathRoomThread(BathRoom room, String name){

this.room = room;

this.name = name;

}

public void run() {

for(int i=0;i<20;i++){

room.use(name);

}

}

}

class BathRoom{

//synchronized 123이 끝날때까지 다른 접근 못함

boolean first = true;

public synchronized void use(String name){

if (first && name.equals("민")){

try {

wait();

} catch (InterruptedException e) {

e.printStackTrace();

}

}

System.out.println(name +"가 입장한다(1)");

System.out.println(name +"가 사용한다(2)");

System.out.println(name +"가 퇴장한다(3)");

first=false;

notifyAll();

//항상 김이 먼저 쓰도록 

}

}

public class ThreadTest2 {

public static void main(String[] args) {

BathRoom room = new BathRoom();

BathRoomThread a = new BathRoomThread(room, "김");

BathRoomThread b = new BathRoomThread(room, "민");

a.start();

b.start();

}

}