java 启动多线程

java 平时启动临时的线程  偷懒的做法是

new Thread(new Runnable() {
    @Override
    public void run() {
        
    }
}).start();

其实通过线程池会更好。如下两种

ExecutorService threadPool = Executors.newFixedThreadPool(100);
threadPool.execute(new Runnable() {
    @Override
    public void run() {
        
    }
});

ExecutorService threadPool = Executors.newFixedThreadPool(100);
Runnable runnable =()->{
    //TODO
};
threadPool.submit(runnable);