Sir tell me some tips to code in java?

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If you know C / C++ already, just try how will you able to achieve same examples in java. I prefer try to understand the fundamental of java and create small programs, then make the connectivity among them. Slowly build an application.
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Software Trainer

Read from a standard book and practice
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Tutor

First of all u need to get the concept of java. i.e. Identify the area of interest and the corresponding attributes. this is half way done. then step by step u learn what is constructor, method overloading, inheritance.
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Java Trainer

If you know C / C++ already, just try how will you able to achieve same examples in java. I prefer try to understand the fundamental of java and create small programs, then make the connectivity among them. Slowly build an application.
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Experience in Java and Android Trainer.

Should be sound knowledge in OOPs concept and then practice SCJP example programming.
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Coaching

Better to start with some core JAVA programming.
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Java Techonologies

Buy a scjp book by Katty Sierra and do practise every day you will become master one day in java
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IT Training expert

If You are new to Java programming, I recommend you go for some training program.
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B.Tech CS working as Software Engineer in product based company

Go through Balaguruswamy and Oracle Java Specifications.
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Mentor

serialVersionUID is a version control mechanism in a Serializable class. If you do not explicitly declare a serialVersionUID, JVM will do it for you automatically. This ID is used during deserialization to verify that the sender and receiver of a serialized object are compatible with respect to serialization.... read more
serialVersionUID is a version control mechanism in a Serializable class. If you do not explicitly declare a serialVersionUID, JVM will do it for you automatically. This ID is used during deserialization to verify that the sender and receiver of a serialized object are compatible with respect to serialization. If the receiver has loaded a class for the object that has a different serialVersionUID than that of the corresponding sender's class, then deserialization will result in an InvalidClassException. You can learn more about this here:http://docs.oracle.com/javase/1.5.0/docs/api/java/io/Serializable.html read less
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