如何实例化同一对象的两个线程，并让这两个对象打印不同的内容

class Printer {
    private String content;

    public void setContent(String content) {
        this.content = content;
    }

    public void printContent() {
        System.out.println(content);
    }
}

public class Main {
    public static void main(String[] args) {
        Printer printer = new Printer();

        Thread thread1 = new Thread(() -> {
            printer.setContent("Thread 1: Hello");
            printer.printContent();
        });

        Thread thread2 = new Thread(() -> {
            printer.setContent("Thread 2: World");
            printer.printContent();
        });

        thread1.start();
        thread2.start();
    }
}

Thread 1: Hello
Thread 2: World