UML之包图

package com.liuc;


public class AutoPackage {
	
	public static void main(String[] args) {
		long start=System.currentTimeMillis();
		  long sum = 0L;
	        for (int i = 0; i < Integer.MAX_VALUE; i++) {
	            sum += i;
	        }
	        long end=System.currentTimeMillis();
	        System.out.println((end-start)/1000);
	}
}

运行时间19S

package com.liuc;


public class AutoPackage {
	
	public static void main(String[] args) {
		long start=System.currentTimeMillis();
		Long sum = 0L;
	        for (int i = 0; i < Integer.MAX_VALUE; i++) {
	            sum += i;
	        }
	        long end=System.currentTimeMillis();
	        System.out.println((end-start)/1000);
	}
}

运行时间19S

UML之包图

原文：http://blog.csdn.net/u010850027/article/details/18664371