//這個(gè)例子用來演示StringBuffer類的使用方法。
class StringBufferTest {
	public static void main(String args[]){
		StringBuffer bufferTest= new StringBuffer("Hello,this is first.");
		
		System.out.println(" StringBuffer類的初始值：");
		System.out.println(bufferTest);
		
		bufferTest.append("\n 這兒是首次相加。");
		System.out.println(bufferTest);
		
		//cast StringBuffer to String
		String secondTest= bufferTest.toString();
		System.out.println(secondTest);
	}
}