memorytest.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 27 行

/*
 * $Id: MemoryTest.java,v 1.2 2003/12/07 15:51:54 epr Exp $
 */
package org.jnode.test;


/**
 * @author epr
 */
public class MemoryTest {

	public static void main(String[] args) {
		System.out.println("Memory size: " + Runtime.getRuntime().totalMemory());
		System.out.println("Free memory: " + Runtime.getRuntime().freeMemory());

		if ((args.length > 0) && ("gc".equals(args[0]))) {
			System.out.println("Starting gc...");
			long start = System.currentTimeMillis();
			Runtime.getRuntime().gc();
			long end = System.currentTimeMillis();
			System.out.println("Memory size: " + Runtime.getRuntime().totalMemory());
			System.out.println("Free memory: " + Runtime.getRuntime().freeMemory());
			System.out.println("Time taken : " + (end-start) + "ms");
		}
	}
}