package com.dasenlin.gaoji;
public class waitDemo {
public static void main(String[] args) {
ThreadB b = new ThreadB();
b.start();
synchronized(b){//需要b这个对象的这把锁(目前是主线程等待b执行完成)
try {
System.out.println("等待对象完成执行");
b.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("b对象计算的总和是:"+b.total);
}
}
}
class ThreadB extends Thread{
int total;
@Override
public void run() {
synchronized(this){
for(int i=0;i<101;i++){
total+=i;
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
//计算完成后通知等待的线程,可以取锁
notify();
}
}
}
package com.dasenlin.gaoji;
public class WaitDemo2 {
public static void main(String[] args) {
final String flag = "go beijing";
Thread driver = new Thread(){
@Override
public void run() {
for(int i=0;i<10;i++){
System.out.println("[司机]正在开车去目的地");
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("[司机]抵达目的地了");
synchronized(flag){
System.out.println("[司机]叫醒乘客");
flag.notify();
}
}
};
Thread passenger = new Thread(){
@Override
public void run(){
synchronized(flag){
System.out.println("[乘客]告诉司机开始出发了");
driver.start();//司机启动
try {
System.out.println("[乘客]准备开始睡觉额");
flag.wait();
System.out.println("[乘客]抵达");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
};
passenger.start();//乘客启动;
}
}
package com.dasenlin.gaoji;
public class WaitDemo3 {
public static void main(String[] args) {
Godown godown = new Godown(30);
Consumer c1 = new Consumer(50,godown);
Consumer c2 = new Consumer(20,godown);
Consumer c3 = new Consumer(30,godown);
Producer p1 = new Producer(10, godown);
Producer p2 = new Producer(10, godown);
Producer p3 = new Producer(10, godown);
Producer p4 = new Producer(10, godown);
Producer p5 = new Producer(10, godown);
Producer p6 = new Producer(10, godown);
Producer p7 = new Producer(80, godown);
c1.start();c2.start();c3.start();
p1.start();p2.start();p3.start();p4.start();p5.start();p6.start();p7.start();
}
}
class Godown{
public static final int max_size=100;
public int curnum;
public Godown() {
}
public Godown(int curnum) {
this.curnum = curnum;
}
public synchronized void produce(int neednum){
while((neednum + curnum)>max_size){
System.out.println("要生产的产品数量"+neednum+"超过剩余库存量"+(max_size-curnum)+",暂时不能执行生产任务!");
try {
wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
curnum +=neednum;
System.out.println("已经生产了"+neednum+"个产品,现在仓储量为"+curnum);
notifyAll();
}
public synchronized void consume(int neednum){
while(curnum<neednum){
try {
wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
curnum-=neednum;
System.out.println("消费了"+neednum+"个产品,现在仓储量为"+curnum);
notifyAll();
}
}
class Producer extends Thread{
private int neednum;
private Godown godown;
public Producer(int neednum,Godown godown){
this.neednum = neednum;
this.godown = godown;
}
@Override
public void run(){
godown.produce(neednum);
}
}
class Consumer extends Thread{
private int neednum;
private Godown godown;
public Consumer(int neednum,Godown godown){
this.neednum = neednum;
this.godown = godown;
}
@Override
public void run(){
godown.consume(neednum);
}
}
package com.dasenlin.gaoji;
public class ThreadDemo {
public static void main(String[] args) {
Thread t1 = new MyCommon();
Thread t2 = new Thread(new MyDaemon());
t2.setDaemon(true);
t2.start();
t1.start();
}
}
class MyCommon extends Thread{
@Override
public void run() {
for(int i=0;i<5;i++){
System.out.println("线程1第"+i+"次执行!");
try {
Thread.sleep(7);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
class MyDaemon implements Runnable{
@Override
public void run() {
for(long i=0;i<9999999L;i++){
System.out.println("后台线程第"+i+"次执行!");
try {
Thread.sleep(7);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
package com.dasenlin.gaoji;
/**
*
*/
public class ErrorDemo {
static class SellTicket implements Runnable{
private int ticket=10;
private String lock=""; //标记锁
@Override
public void run() {
while(true){
/*synchronized(this){ //对象锁 SellTicket.class
if(this.ticket>0){
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName()+"剩余:" + --this.ticket);
}else{
break;
}
}//对象锁*/
synchronized(lock){ //标记锁
if(this.ticket>0){
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName()+"剩余:" + --this.ticket);
}else{
break;
}
}// 标记锁
}
}
}
public static void main(String[] args) {
SellTicket sk = new SellTicket();
Thread t1 = new Thread(sk);
Thread t2 = new Thread(sk);
Thread t3 = new Thread(sk);
t1.start();
t2.start();
t3.start();
}
}
package com.dasenlin.gaoji;
public class DeadLockDemo {
public static void main(String[] args) {
System.out.println("主线程开始");
final StringBuffer buffer = new StringBuffer("ABCD");
Thread t = new Thread(){
@Override
public void run() {
System.out.println("子线程开始");
synchronized(buffer){
buffer.reverse();
System.out.println("子:"+buffer);
}
System.out.println("子线程结束");
}
};
t.start();//启动了
synchronized(buffer){
System.out.println("进入同步锁");
try {
t.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(buffer);
}
System.out.println("主线程结束");
}
}
package com.dasenlin.gaoji;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
public class CallableDemo {
public static void main(String[] args) {
try {
ExecutorService pool = Executors.newFixedThreadPool(2);
Callable c1 = new MyCallable("A");
Callable c2 = new MyCallable("B");
Future f1 = pool.submit(c1);
Future f2 = pool.submit(c2);
System.out.println(">>>"+f1.get().toString());
System.out.println(">>>"+f2.get().toString());
pool.shutdown();
} catch (InterruptedException | ExecutionException e) {
e.printStackTrace();
}
}
}
class MyCallable implements Callable{
private String oid;
private int total;
MyCallable(String oid){
this.oid = oid;
}
@Override
public Object call() throws Exception {
for(int i=0;i<101;i++){
total+=i;
Thread.sleep(10);
}
return oid+":"+this.total;
}
}