在Java 8中将匿名内部方法转换为Lambda

Question

如何使用Java 8将以下代码（特别是public void run（）方法）转换为lambda

public class SampleApp {

    public static void main(String[] args) {
        Thread t1 = new Thread(new Runnable() {

            @Override
            public void run() {
                for (int i = 0; i < 10; i++) {
                    System.out.println("Hello " + i);
                    try {
                        Thread.sleep(100);
                    }
                    catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        });

        t1.start();
    }
}

尝试过：

Thread t1 = new Thread(new Runnable() -> {

    for (int i = 0; i < 10; i++) {
        System.out.println("Hello " + i);
        try {
            Thread.sleep(100);
        }
        catch (InterruptedException e) {
            e.printStackTrace();
        }
    };

);

但Eclipse不断抛出错误

Answer 1

嗨，如果你想在线，你可以这样做

    final Thread t1 = new Thread(()->{
        for (int i = 0; i < 10; i++) {
            System.out.println("Hello " + i);
            try { Thread.sleep(100); }
            catch (final InterruptedException e) {
                e.printStackTrace();
            }
        }
    });

Answer 2

只需删除new Runnable：

Thread t1 = new Thread(() -> { /* body */ });

您可能想考虑将该实体拉入“真实”的方法中，并使用方法引用代替：

static void doSomething() { /* body */ }

public static void main(String[] args) {
  Thread t1 = new Thread(SampleApp::doSomething);
}

大的lambda主体不是特别可读