JavaSE8基础 StringBuffer append 向缓冲区中变量的末尾追加字符串与缓冲区容量的自动扩充

package jizuiku1;

public class Demo000 {
	public static void main(String[] args) {
		StringBuffer sb = new StringBuffer();
		System.out.println("缓冲容的容量是:"+sb.capacity());
		System.out.println("字符串的长度是:"+sb.length());
		
		System.out.println("----------------");
		
		sb.append("0123456789ABCDEF");//追加一个 长度为16的字符串
		System.out.println("缓冲容的容量是:"+sb.capacity());
		System.out.println("字符串的长度是:"+sb.length());

		System.out.println("----------------");
		
		sb.append("0");//追加一个 长度为1的字符串,缓冲区存不下了,那么?
		System.out.println("缓冲容的容量是:"+sb.capacity());//自动扩充
		System.out.println("字符串的长度是:"+sb.length());
	}
}