写一个JAVA启动类作为主线程，并在启动类中创建并运行一个新的线程。B，在该新线程中从键盘读入一行字符串 java多线程编程
\u7f16\u5199\u4e00\u4e2aJava\u5e94\u7528\u7a0b\u5e8f\uff0c\u5728\u4e3b\u7ebf\u7a0b\u4e2d\u518d\u521b\u5efa\u4e00\u4e2aJframe\u7c7b\u578b\u7684\u7a97\u53e3\uff0c\u5728\u8be5\u7a97\u53e3\u4e2d\u518d\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0bgiveWord\u3002\u3010\u4ee3\u78011\u3011//\u8c03\u7528sleep\u65b9\u6cd5\u4f7f\u5f97\u7ebf\u7a0b\u4e2d\u65ad6000\u8c6a\u79d2
sleep(6000);
\u3010\u4ee3\u78012\u3011//\u7528WordThread\u58f0\u660e\u4e00\u4e2agiveWord\u5bf9\u8c61
WordThread giveWord;
\u3010\u4ee3\u78013\u3011//\u521b\u5efagiveWord\uff0c\u5c06wordLabel\u4f20\u9012\u7ed9WordThread\u6784\u9020\u65b9\u6cd5\u7684\u53c2\u6570
giveWord = new WordThread(wordLabel);
\u3010\u4ee3\u78014\u3011
giveWord.isAlive()
\u3010\u4ee3\u78015\u3011//giveWord\u8c03\u7528\u65b9\u6cd5start()
giveWord.start()
import java.util.Scanner;
public class Test
{
public static void main(String[] args)
{
final Message message = new Message();
final Thread thread = new Thread(new Runnable() {
public void run() {
Scanner scanner = new Scanner(System.in);
while (true) {
String msg = scanner.next();
if (msg.equals("EXIT"))
return;
message.sendMessage(msg);
}
}
});
thread.start();
while (true) {
if (thread.isAlive() == false)
break;
String msg = message.receiveMessage();
if (msg != null) {
System.out.println(msg);
}
try {
Thread.sleep(100);
} catch (InterruptedException e) {}
}
}
}
class Message {
private String message;
private boolean unread = false;
synchronized void sendMessage(String message) {
this.message = message;
unread = true;
}
synchronized String receiveMessage() {
String msg = unread ? message : null;
unread = false;
return msg;
}
}
public class TestthreadA extends Thread{
public static void main(String[] args) {
new TestthreadA().start();
}
public void run(){
TestthreadB tb = new TestthreadB();
tb.start();
boolean flag = true;
while(flag){
if(!tb.isAlive()){
System.out.println("线程B已结束，正在退出线程A");
flag = false;
interrupt();
}
}
}
}
副线程
public class TestthreadB extends Thread{
public boolean f = true;
public void TestthreadB(){
}
@Override
public void run() {
// TODO Auto-generated method stub
String st=null;
boolean flag = true;
while(flag){
Scanner sc=new Scanner(System.in);
st=sc.next();
if("exit".equals(st.toLowerCase())){
flag = false;
System.out.println("正在退出线程B");
interrupt();
}else{
System.out.println("您输入的是:"+st);
}
}
}
}
兄弟也不会，只能写到这里，等待高烧：
public class A {
public static void main(String[] args){
C c=new C();
B b=new B();
Thread t=new Thread(b);
t.start();
}
}
class B implements Runnable{
public void B(){
}
@Override
public void run() {
String st=null;
while(true){
Scanner sc=new Scanner(System.in);
st=sc.next();
System.out.println(st);
}
}
}
一个Scanner接收字符串 然后判断isIgnorCase("exit") 如果是就调用system.exit(0)不是就不进IF语句 直接输出即可
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