多线程经典入门

package com.xml.test;

public class MyThread {

/**
* @param args
*/
int j;
public synchronized void inc(){
j++;
System.out.println(Thread.currentThread().getName()+"--inc"+j);
}
public synchronized void des(){
j--;
System.out.println(Thread.currentThread().getName()+"--des"+j);
}
class InnerClass_a implements Runnable{
public void run() {
for(int i=0;i<100;i++){
inc();
}
}
}
class InnerClass_b implements Runnable{
public void run() {
for(int i=0;i<100;i++){
des();
}
}
}
public static void main(String[] args) {

MyThread mythread = new MyThread();
InnerClass_a class_a = mythread.new InnerClass_a();
InnerClass_b class_b = mythread.new InnerClass_b();
for(int i=0;i<1;i++){
Thread thread_a = new Thread(class_a);
thread_a.start();
Thread thread_b = new Thread(class_b);
thread_b.start();
}
}

}