java 抛出异常 throw

[java]代码库

/**
 * 抛出异常 throw
 */
class ThrowDemo {
	static void demoproc() {
		try {
			throw new NullPointerException("demo");
		} catch (NullPointerException e) {
			System.out.println("caught inside demoproc");
			throw e;
		}
	}

	public static void main(String args[]) {
		try {
			demoproc();
		} catch (NullPointerException e) {
			System.out.println("recaught: " + e);
		}
	}
}