// Create a thread by implementing Runnable.

class MyThread implements Runnable {
int count;
String thrdName;

MyThread(String name) {
count=0;
thrdName=name;
}

//Entry point of thread.
public void run() {
System.out.println(thrdName+" starting.");
try {
do {
Thread.sleep(500);
System.out.println(" In "+thrdName+
",count is "+count);
count++;
}while(count<10);
}
catch(InterruptedException exc) {
System.out.println(thrdName+" interrupted.");
}
System.out.println(thrdName+" terminating.");
}
}

class UseThread {
public static void main(String args[]) {
System.out.println("Main thread starting.");
// First,construct a MyThread object.
MyThread mt=new MyThread("Child #1");

// Next,construct a thread rom that object.
Thread newThrd=new Thread(mt);
//Finally,start execution of the thread.
newThrd.start();

do{
System.out.print(".");
try {
Thread.sleep(100);
}
catch(InterruptedException exc)
{
System.out.println("Main thread interrupted.");
}
}while(mt.count!=10);

System.out.println("Main thread ending.");

}
}

现在学习多线程原理，如上这个程序，请问它是如何运行的，运行步骤是怎样的？在调用start()函数时是否已开始运行新线程，运行到什么时候返回main(),请各位兄台指点一二，非常感谢！

Main thread starting.
.Child #1 starting.
.... In Child #1,count is 0
..... In Child #1,count is 1
..... In Child #1,count is 2
..... In Child #1,count is 3
..... In Child #1,count is 4
..... In Child #1,count is 5
..... In Child #1,count is 6
..... In Child #1,count is 7
..... In Child #1,count is 8
..... In Child #1,count is 9
Child #1 terminating.
Main thread ending.

我也正开始看线程, 看结果就知道了啊..... 并不是start()就开始新线程,因为主线程和Child #1默认优先级都是5 但入口是主线程. 如果想一start()就开始其他线程 先设置他的优先级比主线程高.sleep()转到阻塞状态.

// Create a thread by implementing Runnable.

class MyThread implements Runnable {
int count;
String thrdName;

MyThread(String name) {
count=0;
thrdName=name;
}

//Entry point of thread.
public void run() {
System.out.println(thrdName+" starting.");
try {
do {

Thread.sleep(1000);
System.out.println(" In "+thrdName+
",count is "+count);
count++;
}while(count<10);
}
catch(InterruptedException exc) {
System.out.println(thrdName+" interrupted.");
}
System.out.println(thrdName+" terminating.");
}
}

class UseThread {
public static void main(String args[]) {
System.out.println("Main thread starting.");
// First,construct a MyThread object.
MyThread mt=new MyThread("Child #1");

// Next,construct a thread rom that object.
Thread newThrd=new Thread(mt);
//Finally,start execution of the thread.
newThrd.start();

do{
System.out.print(".");
try {
Thread t=Thread.currentThread(); >>display currentThread
System.out.println(t);
Thread.sleep(500);
}
catch(InterruptedException exc)
{
System.out.println("Main thread interrupted.");
}
}while(mt.count!=10);

System.out.println("Main thread ending.");

}
现在执行顺序弄清楚了，谢谢兄台指点。如上在>>处清添加的显示当前线程的语句，为何不起作用，无法显示当前线程。