secmcheckperm.java

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.*;
import java.awt.*;
public class SecMCheckPerm{
     public static void main(String args[]){
        try{
	      	SecurityManager sm = System.getSecurityManager();
		if (sm != null) {
                    FilePermission fp=new FilePermission("c:\\autoexec.bat", "read");
	 	       sm.checkPermission(fp);
		}
             System.out.println("Has FilePermission to read c:\\autoexec.bat");

        } 
        catch(AccessControlException  e){
		System.out.println(e);
        }

        try{
	      	SecurityManager sm = System.getSecurityManager();
		if (sm != null) {
                  AWTPermission ap=new AWTPermission("accessClipboard");
		     sm.checkPermission(ap);
		}
      	       System.out.println("Has AWTPermission to access AWT Clipboard");

        } 
        catch(AccessControlException  e){
		System.out.println(e);
        }
     }
}