System.out.println(stringBuffer.toString()); // 输出:Hello, World!
D. for (int i = 0; i < 10; i++) 答案: D
LocalDateTime now = LocalDateTime.now();
mkdir -p mods/com.example.myapp
public static void main(String[] args) {
myAnimal.makeSound(); // Prints "The animal makes a sound"
public synchronized void synchronizedMethod() {