多线程初探

继承thread类---重写run方法---创建线程对象---调用start（）方法启动

public class Th{
    public static void main(String[] args){
        Thread t1=new my();
        t1.start();
        //子线程1
        Thread t2=new you();
        t2.start();
        //子线程2
        Thread t3=new he();
        t3.start();
        //子线程3
        for(int i=0;i<6;i++){
            System.out.println("main"+i);
            //主线程
        }
    }
}
class my extends Thread{
    @Override
    public void run(){
        for(int i=0;i<5;i++){
            System.out.println("son"+i);
        }
    }
}
class you extends Thread{
    @Override
    public void run(){
        for(int i=0;i<8;i++){
            System.out.println("daughter"+i);
        }
    }
}
class he extends Thread{
    @Override
    public void run(){
        for(int i=0;i<8;i++){
            System.out.println("son2"+i);
        }
    }
}

package a;
import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask;
public class Th{
    public static void main(String[] args){
        Thread t1=new my();
        t1.start();
        //子线程1
        Thread t2=new you();
        t2.start();
        //子线程2
        Thread t3=new he();
        t3.start();
        //子线程3
        Runnable r=new she();
        Thread t4=new Thread(r);
        t4.start();
        //子线程4
        Callablec=new it();
        FutureTask f=new FutureTask<>(c);
        Thread t5=new Thread(f);
        t5.start();
        //子线程5
        for(int i=0;i{
    @Override
    public String call(){
        int sum=0;
        for (int i=0;i