test.java

RSA加密算法简单实现

package rsa;

import java.util.Date;
import java.util.GregorianCalendar;

public class test {

	public test() {
		super();
		// TODO 自动生成构造函数存根
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO 自动生成方法存根
		double M=100000000F;
		Date d1=new Date();
	
		
		GregorianCalendar c1 = new GregorianCalendar();
		double count=0F;
		do{
			count=count+1;
		}while(count<M);		
		GregorianCalendar c2 = new GregorianCalendar();
	
		long timeTaken = c2.getTimeInMillis() - c1.getTimeInMillis();
		System.out.println("c1 datetime+"+c1.getTime());
		System.out.println("c2 datetime+"+c2.getTime());
		System.out.println("timeTaken="+timeTaken/1000);
		
		
	}

}