SEARCH KEYWORD -- JAVA INTERVIEW
Using Java keytool programmatically
Java provides a command line tool to access and operate different keystore which store keys and certificates. This tool is named keytool and is located at \bin. On command line, you can issue below command to generate a keystore named mytest.jks which contains a private key and certificate chain. keytool -genkeypair -alias mykey -keyalg RSA -sigalg SHA256withRSA -dname CN=Java -storetype JKS -keypass password -keystore mytest.jks -storepass password Sometimes, in testing purpose, w...
JavaScript JVM runs Java
The world of software is made slightly crazy because of the huge flexibility within any computer language. Once you have absorbed the idea of a compiler written in the language it compiles what else is there left to gawp at? But... a Java Virtual Machine JVM written in JavaScript seems like another level of insanity.In fact it is a quite reasonable idea which is only made mad by the usual positions that Java, the top dog, and JavaScript the underling, usually occupy. Java is compiled not to mach...
JavaScript,JVM,BicaVM,Cross platform,JavaScript written JVM 2011-11-22 02:51:38
Learning Is More Important Than Knowing
Although DuckDuckGo's success is based more on ideology than technology, you'd have to be a pretty arrogant technologist to not appreciate and be impressed with what this small team (for a long time, 1 person) has accomplished. And while DuckDuckGo teaches us a number of valuable lessons (about business, and privacy), to me, the most important, is that good programmers should be measured by what they can learn, not what they already know. Gabriel Weinberg, DuckDuckGo's creator, has been wo...
Learning,Knowing,Google,DuckDuckGo 2012-04-18 07:17:53
Debunking the Google Interview Myth
Years ago, rumors used to circulate about Microsoft interviews. They were the hot, new company that everyone wanted to work. With envy came the urban myths. These rumors have since been transfered to Google, and will surely be transfered to some new company in due time. Bloggers – always desperate for links and traffic – have capitalized on this, with scary articles about their “nightmare interview†and “crazy questions“. Let’...
Google,Microsoft,Business insider,Interv 2011-04-26 10:09:53
Access control in Java -- Permission check order
Previously we showed you how to turn on SecurityManager in Java. After SecurityManager is turned on, a series of permission checks will be applied on the code you are calling in your application to protect some resources against malicious access such as files, sockets etc. To perform these permission checks, a set of Permissions will be created and checked using the AccessController. The AccessController has three purposes : To decide whether an access to a critical system resource is to be all...
JAVA,SECURITY,ACCESSCONTROLLER 2016-03-07 04:17:40
Browse OpenJDK Java source code in Eclipse
Java 8 was recently released, many developers are now trying to extract the source code of Java 8 to find out how the new added features such as Lambda expressions, default method in interfaces, new Time API are implemented. How do you manage to download and browse the source code? Today we are going to show how to extract OpenJDK Java source code to Eclipse. Since OpenJDK is adopting Mercurial as its distributed version control system, you need to install Mercurial on your computer first before...
OpenJDK,Java 8,Source code,Eclipse 2014-06-16 00:53:34
C vs Java Complete Comparison
Similarities: Java and C have same syntax operators. Difference—thinking Two paradigms: Java: Object oriented language C: Structured language Differences: --Syntax No preprocessor Java does not include a preprocessor and does not define any analogs of the #define, #include, and #ifdef directives. Constant definitions are replaced with static final fields in Java. (See the java.lang.Math.PI field for an example.) Macro definitions are not available in...
C,Java,Comparison,Difference,Similaritie 2011-10-06 12:46:39
Different types of keystore in Java -- Overview
Keystore is a storage facility to store cryptographic keys and certificates. They are most frequently used in SSL communications to prove the identity of servers and clients. A keystore can be a file or a hardware device. Three are three kinds of entries can be stored in a keystore depending on the types of keystores. The three types of entries are: PrivateKey : This is a type of keys which are used in asymmetric cryptography. It is usually protected with password because of its sensitivity. It ...
JAVA,KEYSTORE,OVERVIEW,JKS,PKCS12,JCEKS,PKCS11,DKS,BKS 2014-08-18 02:09:54
ByteBuffer in Java
ByteBuffer is introduced in java.nio since Java 1.4. It provides a way of representing raw structured data such as from a file or from network. It enables fast access of underlying data compared to traditional ways like byte[] Prior to Java 1.4, if you want to represent a structured raw data, you need to create a byte[] and then having a set of checks to delimit the byte array to get the expected tokens. There are three ways to create a ByteBuffer: Wrapping an exiting array by calling ByteBuffe...
JAVA,BYTEBUFFER,ALLOCATION 2015-07-08 03:17:44
Different types of keystore in Java -- PKCS11
PKCS11 keystore is designed for hardware storage modules(HSM). It's an interface to talk to the HSMs. It doesn't actually store any keys but provide a set of classes to communicate with the underlying HSM. The actual keys and certificates are stored on the HSMs. The reason for storing the keys and materials is to ensure security and efficiency. Since the keys are on the HSMs, they are safe to be stolen. All encryption/decryption operations are performed on the HSMs as well, this incre...
RECENT
- Tips for Socializing With Friends During College
- Proximity Cards Do More Than Just Open Doors
- How to choose quality painted auto parts
- Oval engagement rings from MoonOcean: Elegance of form and individual approach
- Hologres vs AWS Redshift
- GoLand connect to Hologres
- A journey to investigate a goroutine leakage case
- Understanding Slice Behavior in Go
- Breaking Barriers: How 3D Printing is Democratizing Product Development
- The Power of Efficiency: 10 Practical Energy-Saving Tips for Tech Startups
- more>>