stringbufferappend.java

高质量Java程序设计 源代码

package net.betterjava.memory.lessobject;

public class StringBufferAppend {

	public static void main(String[] args) {
		System.out.println("Start to append");
		String con = "Concatenation";
		StringBuffer out = new StringBuffer("start\n");
		long time = System.currentTimeMillis();
		for (int i = 0; i < 500000; i++) {
			out = out.append(con).append(Integer.toString(i)).append("\n");
		}
		System.out.println(
			"Append accomplished:" + String.valueOf(System.currentTimeMillis() - time));
		System.out.println("Appended string is:");
		System.out.println(out);
	}
}