创建两个线程,要求如下: (1)一个线程输出100个1~26,另一个线程输出100个A~Z。 (2)一个线程使用集成Thread 类的写法,另一个线程使用实现Runnable接口的写法。

以下是创建两个线程的示例代码：

1. 使用继承Thread类的写法：

class FirstThread extends Thread {
    public void run() {
        for (int i = 1; i <= 100; i++) {
            System.out.print(i + " ");
        }
    }
}

class SecondThread extends Thread {
    public void run() {
        for (char c = 'A'; c <= 'Z'; c++) {
            System.out.print(c + " ");
        }
    }
}

public static void main(String[] args) {
    FirstThread firstThread = new FirstThread();
    SecondThread secondThread = new SecondThread();
    firstThread.start();
    secondThread.start();
}

2. 使用实现Runnable接口的写法：

class FirstThread implements Runnable {
    public void run() {
        for (int i = 1; i <= 100; i++) {
            System.out.print(i + " ");
        }
    }
}

class SecondThread implements Runnable {
    public void run() {
        for (char c = 'A'; c <= 'Z'; c++) {
            System.out.print(c + " ");
        }
    }
}

public static void main(String[] args) {
    FirstThread firstThread = new FirstThread();
    SecondThread secondThread = new SecondThread();
    Thread thread1 = new Thread(firstThread);
    Thread thread2 = new Thread(secondThread);
    thread1.start();
    thread2.start();
}