Java23线程练习：奇偶数
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文章目录
1.在子线程中输出1-100之间的偶数，主线程输出1-100之间的奇数
package com.atguigu.test02.homework01;
public class Test01 {
public static void main(String[] args) {
new Thread(){
public void run(){
for (int i = 0; i <= 100; i+=2) {
System.out.println("子线程：" + i);
}
}
}.start();
for (int i = 1; i <= 100; i+=2) {
System.out.println("主线程：" + i);
}
}
}
2.创建和启动2个子线程，一个打印1-10之间奇数，一个打印1-10之间偶数
package com.atguigu.test03.homework02;
//（1）要求每个线程要么不打印，要么就连续打印5个数，每个数打印间隔500毫秒 。（2）但两个线程不要求交替打印。
public class Test02 {
public static void main(String[] args) {
Odd o = new Odd();
Even e = new Even();
o.start();
e.start();
}
}
class Odd extends Thread{
private int num = 1;
public void run(){
while(true){
synchronized (Thread.class) {
for (int i = 1; i <=5; i++) {
System.out.println("奇数线程，第" + i + "个：" + num);
num += 2;
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
}
class Even extends Thread{
private int num = 0;
public void run(){
while(true){
synchronized (Thread.class) {
for (int i = 1; i<=5; i++) {
System.out.println("偶数线程，第" + i + "个：" + num);
num += 2;
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
}
3.创建和启动2个子线程，一个打印奇数，一个打印偶数
package com.atguigu.test05.homework03.copy;
//（1）要求实现交替打印。（2）每个数打印间隔1秒
public class Test03 {
public static void main(String[] args) {
MyThread t1 = new MyThread();
MyThread t2 = new MyThread();
t1.start();
t2.start();
}
}
class PrintNumber{
private static int num = 1;
public static synchronized void print(){
try {
PrintNumber.class.notify();
System.out.println(Thread.currentThread().getName() + ":" + num);
num++;
PrintNumber.class.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
class MyThread extends Thread{
public void run(){
while(true){
PrintNumber.print(); //静态方法
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
4.使用两个线程循环打印出1~100
package com.itheima.demo01;
class Num {
int i;
boolean falg;
}
class TestThread1 {
public static void main(String[] args) {
Num num=new Num();
Thread t1=new Thread(new A(num));
Thread t2=new Thread(new B(num));
t1.start();
t2.start();
}
}
//1111111111111111111111111111111111111111111111111111111111111111111111
class A implements Runnable{
private Num num;
public A(Num num) {
this.num=num;
}
@Override
public void run() {
while(num.i<99){
synchronized(num){
//1111111111111111111111111111111111111111111111111111111111111111111
if(num.falg){
try {
num.wait();
} catch (InterruptedException e) {}
}
num.i++;
num.falg=true;
System.out.println(Thread.currentThread().getName()+"-"+num.i);
num.notify();
}
}
}
}
//1111111111111111111111111111111111111111111111111111111111111111111111
class B implements Runnable{
private Num num;
B(Num num){
this.num=num;
}
@Override
public void run() {
while(num.i<99){
synchronized(num){
//11111111111111111111111111111111111111111111111111111111111111111
if(!num.falg){
try {
num.wait();
} catch (InterruptedException e) {}
}
num.i++;
num.falg=false;
System.out.println(Thread.currentThread().getName()+"-"+num.i);
num.notify();
}
}
}
}
5.使用三个线程循环打印出1~100
package com.itheima.demo01;
class TestThread2 {
public static void main(String[] args) throws Exception{
Thread t1 = new Thread(new MyThread1(0));
Thread t2 = new Thread(new MyThread1(1));
Thread t3 = new Thread(new MyThread1(2));
t1.start();
t2.start();
t3.start();
}
static class MyThread1 implements Runnable {
private static Object lock = new Object();
private static int count = 0;
int no;
public MyThread1(int no) {
this.no = no;
}
@Override
public void run() {
while (true) {
synchronized (lock) {
//11111111111111111111111111111111111111111111111111111111111111111111
if (count >= 100) {
break;
}
if (count % 3 == this.no) {
count++;
System.out.println(this.no + "--->" + count);
} else {
try {
lock.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
lock.notifyAll();
}
}
}
}
}
6.账户类：synchronized 方法
package com.atguigu.test06.homework04;
/*
案例：1、创建一个银行账户类：（1）属性：账号，余额。（2）get/set。（3）toString()：返回：账户：xxx，余额：xxx
2、创建一个丈夫类：负责往里存钱，每次存款[0,10000)以内不等
3、创建一个妻子类：负责取钱，每次取款[0,10000)以内不等，如果余额不足，要等丈夫存够了才能取
*/
public class Test04 {
public static void main(String[] args) {
Account a = new Account("1122", 0);
AccountManager am = new AccountManager(a);
Husband h = new Husband("崔志恒",am);
Wife w = new Wife("甄玉禄",am);
h.start();
w.start();
}
}
//11111111111111111111111111111111111111111111111111111111111111111111111
class Husband extends Thread{
private AccountManager am;
public Husband(String name,AccountManager am) {
super(name);
this.am = am;
}
public void run(){
while(true){
am.save();
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
//11111111111111111111111111111111111111111111111111111111111111111111111
class Wife extends Thread{
private AccountManager am;
public Wife(String name,AccountManager am) {
super(name);
this.am = am;
}
public void run(){
while(true){
am.withdraw();
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
//11111111111111111111111111111111111111111111111111111111111111111111111
class AccountManager{
private Account account;
public AccountManager(Account account) {
super();
this.account = account;
}
public synchronized void save(){
double money = Math.random() * 10000;
System.out.println(Thread.currentThread().getName() + "开始存钱，目前账户状态：" + account);
System.out.println("本次存钱的数量是：" + money);
account.setBalance(account.getBalance() + money);
System.out.println(Thread.currentThread().getName() + "存钱结束，目前账户状态： " + account);
this.notify();
}
public synchronized void withdraw(){
double money = Math.random() * 10000;
System.out.println(Thread.currentThread().getName() + "开始取钱，目前账户状态：" + account);
while(money > account.getBalance()){
try {
System.out.println("本次想取钱的数量是：" + money + "，余额不足....");
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
account.setBalance(account.getBalance() - money);
System.out.println(Thread.currentThread().getName() + "取钱结束，目前账户状态： " + account);
}
}
//111111111111111111111111111111111111111111111111111111111111111111111111
class Account{
private String id;
private double balance;
public Account(String id, double balance) {
super();
this.id = id;
this.balance = balance;
}
public Account() {
super();
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public double getBalance() {
return balance;
}
public void setBalance(double balance) {
this.balance = balance;
}
@Override
public String toString() {
//账户：xxx，余额：xxx
return "账户： " + id +"余额：" + balance;
}
}
7.模拟多个人通过一个山洞：synchronized 方法
package com.atguigu.test07.homework05;
/*
1、这个山洞每次只能通过一个人，每个人通过山洞的时间为5秒；
2、随机生成10个人，同时准备过此山洞
3、定义一个变量用于记录通过隧道的人数
4、显示每次通过山洞人的姓名，和通过顺序；
*/
public class Test05 {
public static void main(String[] args) {
Tunnel t = new Tunnel();
for (int i = 1; i <= 10; i++) {
Thread th = new Thread(t, "p" + i);
th.start();
}
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