Java 8 lambda 和匿名内部类之间的性能差异

Java 8 lambda与匿名内部类性能比较

java
public class PerformanceTest {
    public static void main(String[] args) {
        final int MAX_ITERATIONS = 1000000;
        // 使用lambda表达式
        long start = System.currentTimeMillis();
        for (int i = 0; i < MAX_ITERATIONS; i++) {
            Runnable lambdaRunnable = () -> System.out.println("Hello, lambda!");
            lambdaRunnable.run();
        }
        long end = System.currentTimeMillis();
        System.out.println("Lambda expression time: " + (end - start) + "ms");
        // 使用匿名内部类
        start = System.currentTimeMillis();
        for (int i = 0; i < MAX_ITERATIONS; i++) {
            Runnable anonymousRunnable = new Runnable() {
                @Override
                public void run() {
                    System.out.println("Hello, anonymous inner class!");
                }
            };
            anonymousRunnable.run();
        }
        end = System.currentTimeMillis();
        System.out.println("Anonymous inner class time: " + (end - start) + "ms");
    }
}