JAVA程序设计与实践.rar

				/*
				 * 文件名:ex_6_2_1.java
				 * 说  明:演示length()和capacity()
				 */
				class ex_6_2_1 {
					public static void main(String args[]) {
						StringBuffer sb = new StringBuffer("Hello");
						System.out.println("buffer = " + sb);
						System.out.println("length = " + sb.length());
						System.out.println("capacity = " + sb.capacity());
					}
				}