拋開面試八股文不談，兩種都本質(zhì)區(qū)別是線程獲取不到鎖時的狀態(tài)區(qū)別晒奕。
Talk is cheap, show my code闻书！

public class Main20 {

    private static ReentrantLock lock = new ReentrantLock();

    public static void main(String[] args) throws Exception {
        test();
    }

    public static void test() throws InterruptedException {
        Thread thread01 = new Thread(Main20::fun01);
        Thread thread02 = new Thread(Main20::fun02);
        Thread thread11 = new Thread(Main20::fun01);
        Thread thread12 = new Thread(Main20::fun02);
        
        thread01.start(); //線程先占著資源
        thread02.start(); //線程先占著資源
        TimeUnit.MILLISECONDS.sleep(1);
        System.out.println("step01: " + thread01.getState()); //step01: RUNNABLE
        System.out.println("step01: " + thread02.getState()); //step01: RUNNABLE
        System.out.println("step01: " + thread11.getState()); //step01: NEW
        System.out.println("step01: " + thread12.getState()); //step01: NEW
        thread11.start(); //線程搶奪資源
        thread12.start(); //線程搶奪資源
        TimeUnit.MILLISECONDS.sleep(1);
        System.out.println("step02: " + thread01.getState()); //step02: RUNNABLE
        System.out.println("step02: " + thread02.getState()); //step02: RUNNABLE
        System.out.println("step02: " + thread11.getState()); //step02: BLOCKED
        System.out.println("step02: " + thread12.getState()); //step02: WAITING
        thread01.interrupt(); //終止原線程
        thread02.interrupt(); //終止原線程
        TimeUnit.MILLISECONDS.sleep(1);
        System.out.println("step03: " + thread01.getState()); //step03: TERMINATED
        System.out.println("step03: " + thread02.getState()); //step03: TERMINATED
        System.out.println("step03: " + thread11.getState()); //step03: RUNNABLE
        System.out.println("step03: " + thread12.getState()); //step03: RUNNABLE
    }
    
    public synchronized static void fun01() {
        long i = -100000000000L;
        while (true) {
            i++;
            if (Thread.currentThread().isInterrupted()) {
                break;
            }
        }
    }

    public static void fun02() {
        lock.lock();
        long i = -100000000000L;
        while (true) {
            i++;
            if (Thread.currentThread().isInterrupted()) {
                break;
            }
        }
        lock.unlock();
    }
}

結(jié)果

這兩狀態(tài)的本質(zhì)區(qū)別，blocked是主動脑慧，waiting是被動魄眉。blocked主動尋找監(jiān)視器繼續(xù)競爭鎖，waiting需要被動通知繼續(xù)執(zhí)行闷袒。blocked受操作系統(tǒng)控制坑律，waiting受JVM控制。

若有錯誤或者異議囊骤，歡迎指出～