本书以大量精简的实例介绍了Java安全性编程方面的概念和技术

				import java.io.*;
				import java.security.*;
				
				public final class SuffixPermission extends BasicPermission {
				    public SuffixPermission(String name){
					super(name);
				    }
				    public SuffixPermission(String name, String actions){
					super(name, actions);
				    }
				}