idea 多线程调试

1. 代码

   	import java.util.ArrayList;
   
   	/**
   	 * description:
   	 *
   	 * @author: dawn.he QQ:       905845006
   	 * @email: [email protected]
   	 * @email: [email protected]
   	 * @date: 2019/10/6    1:15 AM
   	 */
   	public class UnsafeArrayList {
   		static ArrayList al = new ArrayList();
   
   		static class AddTask implements Runnable {
   			@Override
   			public void run() {
   
   				try {
   					Thread.sleep(100);
   
   				} catch (
   						InterruptedException e)
   
   				{
   				}
   
   				for (int i = 0; i < 1000000; i++) al.add(new Object());
   			}
   
   		}
   
   		public static void main(String[] args) throws InterruptedException {
   			Thread t1 = new Thread(new AddTask(), "t1");
   			Thread t2 = new Thread(new AddTask(), "t2");
   			t1.start();
   			t2.start();
   			Thread t3 = new Thread(new Runnable() {
   				@Override
   				public void run() {
   					while (true) {
   						try {
   							Thread.sleep(1000);
   						} catch (
   								InterruptedException e)
   
   						{
   						}
   					}
   
   				}
   			}, "t3");
   			t3.start();
   		}
   	}
   

   断点

   设置条件(!Thread.currentThread().getName().equals("main"))