Question

我想在命令行上运行java注释程序。我无法运行该程序。这是程序

manager.delegate.sessionDidReceiveChallenge = { session, challenge in
        var disposition: NSURLSessionAuthChallengeDisposition = .PerformDefaultHandling
        var credential: NSURLCredential?

        if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust {
            let host = challenge.protectionSpace.host

            if let serverTrust = challenge.protectionSpace.serverTrust {

                let serverTrustPolicy = ServerTrustPolicy.PerformDefaultEvaluation(validateHost: true)

                if serverTrustPolicy.evaluateServerTrust(serverTrust, isValidForHost: host) {
                    disposition = .UseCredential
                    credential = NSURLCredential(forTrust: serverTrust)
                } else {
                    disposition = .CancelAuthenticationChallenge
                    return (disposition, credential)
                }

                for index in 0..<SecTrustGetCertificateCount(serverTrust) {
                    if let certificate = SecTrustGetCertificateAtIndex(serverTrust, index) {
                        if let fingerPrint = certificate.SHA1Fingerprint {
                            if isValidFingerprint(fingerPrint)  {
                                return (disposition, credential)
                            }
                        }
                    }
                }
            }
        }
        disposition = .CancelAuthenticationChallenge
        return (disposition, credential)
    }

我使用命令编译程序as javac com / lara / annotations / G.java 它编译成功但我在运行程序时遇到问题。我用命令运行程序为 java com.lara.annotation G. 但它不起作用。请任何人帮我运行这个程序。谢谢。

Answer 1

首先，您应该将注释的保留定义为RUNTIME ... 并且您需要使用反射来打印刚刚注释到方法

的元数据

G gClass = new G(); 
Method m = gClass.getClass( ).getMethod("main"); 
Annotation[] annos = m.getAnnotations();
System.out.println("All annotations for myMeth:"); 
for(Annotation a : annos)
    System.out.println(a);

如何在命令行上运行java注释程序？

1 个答案: