compiledplusoperator.java

来自「高质量Java程序设计 源代码」· Java 代码 · 共 19 行

package net.betterjava.memory.lessobject;

public class CompiledPlusOperator {

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