public class Main {
	public static void main(String[] a) {
		Thread dangqian = Thread.currentThread();//獲取主線程
		System.out.println(dangqian.getState());//輸出RUNNABLE
		//表示主線程正處于RUNNABLE狀態(tài)
		
		Thread tj = new Thread();//新建1個(gè)線程
		System.out.println(tj.getState());//輸出NEW
		
		Thread tj1 = new Thread(new Runnable() {
			@Override
			public void run() {
				System.out.println("ACM");
			}
		});
		tj1.start();
		//啟動(dòng)執(zhí)行完run方法后線程終止 此時(shí)處于TERMINATED狀態(tài)
	}
}

public class Main {
	public static void main(String[] a) {
		Thread tj = new Thread(new Runnable() {
			@Override
			public void run() {
				System.out.println("1");
				try {
					Thread.sleep(3000);//sleep是靜態(tài)方法，所以通過類名來調(diào)用；讓線程睡3s
				}catch (InterruptedException e) {
					e.printStackTrace();
				}
				System.out.println("2");
			}
		});
		tj.start();
		//因?yàn)槭嵌嗑€程，在執(zhí)行tj線程時(shí)，主線程依然往下走
		try {
			Thread.sleep(1000);//讓主線程睡1s
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		System.out.println("3");
		//由于tj線程睡得較久，所以先打印3，再打印2
		tj.interrupt();//中斷此線程，但實(shí)際上只是給線程設(shè)置一個(gè)中斷標(biāo)志，線程仍會(huì)執(zhí)行；在這里用于觸發(fā)異常
	}
}

public class Main {
	public static void main(String[] a) {
		Thread tj = new Thread(new Runnable() {
			@Override
			public void run() {
				System.out.println("1");
				try {
					Thread.sleep(3000);//sleep是靜態(tài)方法，所以通過類名來調(diào)用；讓線程睡3s
				}catch (InterruptedException e) {
					e.printStackTrace();
				}
				System.out.println("2");
			}
		});
		tj.start();
		System.out.println(tj.isAlive());//此時(shí)3s未過，tj線程仍在執(zhí)行；所以輸出true
		try {
			tj.join();//等tj線程執(zhí)行完畢再往下執(zhí)行
			//tj.join(1000); 等待tj線程1s再往下執(zhí)行
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		System.out.println("3");
	    System.out.println(tj.getState());
	    System.out.println(tj.isAlive());//tj線程已執(zhí)行完畢；所以輸出false
	}
}