【JAVA】スレッドの保留、復元、停止のサンプルコード

//       《Java 8           9 》

package com.app.practice;
//       ，     
//Suspending and resuming a thread the modern way.
class NewThread implements Runnable{
	String name;//name of thread
	Thread t;
	boolean suspendFlag;
	
	NewThread(String threadname){
		name = threadname;
		t = new Thread(this, name);
		System.out.println("New thread: "+t);
		suspendFlag = false;
		t.start();//Start the thread
	}
	
	//This is the entry point for thread.
	public void run(){
		try{
			for(int i = 15;i>0;i--){
				System.out.println(name+": "+i);
				Thread.sleep(200);
				synchronized (this) {
					while(suspendFlag){
						wait();
					}
				}
			}
		}catch (InterruptedException e){
			System.out.println(name + " interrupted.");
		}
		System.out.println(name +" exiting.");
	}
	
	synchronized void mysuspend(){
		suspendFlag=true;
	}
	
	synchronized void myresume(){
		suspendFlag = false;
		notify();
	}
}
public class SuspendResume {

	public static void main(String[] args) {
		NewThread ob1 = new NewThread("One");
		NewThread ob2 = new NewThread("Two");
		
		try{
		Thread.sleep(1000);
		ob1.mysuspend();
		System.out.println("Suspending thread One");
		Thread.sleep(1000);
		ob1.myresume();
		System.out.println("Resuming thread One");
		ob2.mysuspend();
		System.out.println("Suspending thread Two");
		Thread.sleep(1000);
		ob2.myresume();
		System.out.println("Resuming thread Two");
		}catch(InterruptedException e){
			System.out.println("Main thread Interrupted");
		}
		
		//wait for threads to finish
		try{
			System.out.println("Waiting for threads to finish.");
			ob1.t.join();
			ob2.t.join();
		}catch (InterruptedException e){
			System.out.println("Main thread Interrupted");
		}
		
		System.out.println("Main thread exiting.");
	}

}