//2.写两个线程，一个线程打印1-52，另一个线程答应字母A-Z。

//打印顺序为12A34B56C……5152Z。通过使用线程之间的通信协调关系。

//注：分别给两个对象构造一个对象o，

//数字每打印两个或字母每打印一个就执行o.wait()。在o.wait()之前不要忘了写o.notify()

package homework2;

import com.sun.swing.internal.plaf.synth.resources.synth;

public class Test2 {

public static void main(String[] args) {

Object object = new Object();

shuzi shuzi = new shuzi(object);

zimu zimu = new zimu(object);

Thread t = new Thread(shuzi);

Thread t1 = new Thread(zimu);

t.start();//数字线程先运行

t1.start();

}

}

class shuzi implements Runnable{

private Object object;

//声明类的引用

public shuzi(Object object) {

this.object = object;

}

public void run() {

synchronized (object) {//上锁

for(int i=1;i<53;i++){

System.out.print(i);

if(i%2==0){

object.notifyAll();//唤醒线程

try {

object.wait();

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

}

}

class zimu implements Runnable{

private Object object;

public zimu(Object object) {

this.object = object;

}

public void run() {

synchronized (object) {

for(int j=65;j<91;j++){

char c = (char)j;

System.out.print(c);

object.notifyAll();

try {

object.wait();

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

}

方法2：

public class Test {

public static void main(String[] args) {

O o = new O();

A a = new A(o);

B b = new B(o);

Thread t = new Thread(a);

Thread t1 = new Thread(b);

t.start();//数字的线程先运行

t1.start();

}

}

class O{

boolean flag = false;//没有

public synchronized void set() throws InterruptedException{

for(int i=1;i<52;i++){

if(this.flag == true){

this.wait();

}

if(i%2==0){

this.flag=true;

this.notifyAll();

}

System.out.print(i);

}

}

public synchronized void get() throws InterruptedException{

for(int j =65;j<91;j++){

if(this.flag == false){

this.wait();

}

char c = (char)j;

System.out.print(c);

this.flag = false;

this.notify();

}

}

}

class A implements Runnable{

O o = new O();

public A(O o) {

super();

this.o = o;

}

public void run() {

try {

o.set();

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

class B implements Runnable{

O o = new O();

public B(O o) {

super();

this.o = o;

}

public void run() {

try {

o.get();

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}