验证任意一个大于2的偶数都能分解成两个素数之和代码.doc

计算机科学与技术学院实验报告实验题目：验证任意一个大于2的偶数都能分解成两个素数之和。学号： 日期：2014-10-23班级：电子商务2014级 姓名： Email：实验目的： 服务器端的对象负责对是否是素数进行判断。客户端负责验证一定范围内的猜想。服务器端可以定时查询客户端验证的进度。硬件环境：机房电脑软件环境：JDK6，Eclipse，RMI插件包 实验步骤：1.Prime.javaimport java.rmi.*;/ RMI 本地接口必须从Remote 接口派生public interface Prime extends Remote / 接口中的具体方法声明，注意必须声明抛出RemoteException boolean isPrime(int n) throws RemoteException; void setStart(int n) throws RemoteException; void setEnd(int n) throws RemoteException; void setNow(int n) throws RemoteException;2.PrimeClient.javaimport java.rmi.*;import java.util.Arrays;import javax.rmi.PortableRemoteObject; public class PrimeImpl extends PortableRemoteObject implements Prime private int start = 0, end = 0, now = -1; /* * 构造函数 */ public PrimeImpl() throws RemoteException super(); public boolean isPrime(int n) throws RemoteException int i,c;i=n;boolean b=true;for(c=2;c=Math.sqrt(i);c+)if(i%c=0)b=false;break;return b; public void setStart(int n) throws RemoteException start = n; public void setEnd(int n) throws RemoteException end = n; public void setNow(int n) throws RemoteException now = n; public int getProcess() if(now = -1 | end = start) return -1; return (now - start) * 100 / (end - start); 3.PrimeImpl.javaimport java.rmi.*;import java.util.Arrays;import javax.rmi.PortableRemoteObject; public class PrimeImpl extends PortableRemoteObject implements Prime private int start = 0, end = 0, now = -1; /* * 构造函数 */ public PrimeImpl() throws RemoteException super(); public boolean isPrime(int n) throws RemoteException int i,c;i=n;boolean b=true;for(c=2;c=