stringconcatenation.java

高质量Java程序设计 源代码

package net.betterjava.memory.lessobject;

public class StringConcatenation {

	public static void main(String[] args) {
		System.out.println("start to concatenate");
		String con = "Concatenation";
		String out = "start\n";
		long time = System.currentTimeMillis();
		for (int i = 0; i < 10000; i++) {
			out = out + con + Integer.toString(i) + "\n";
		}
		System.out.println(
			"Concatenation accomplished:"
				+ String.valueOf(System.currentTimeMillis() - time));
		System.out.println("Concatenated string is:");
		System.out.println(out);
	}
}