What is jpa project?

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Where is singleton design pattern used in java?

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What is optional in java 8? What is the use of optional?advantages of java 8 optional?

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1.can i use super keyword in normal class(not inheritance) to call any method?if so how can i call particular variable? 2.In the inheritance how can i access the particular variable from the base class(it containing 5 variables) using super keyword?

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How can the static main method use instance variables?

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why i can not access private variable in other class?

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How do I run a java project in netbeans?

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public class Dog { private int weight; public int getweight(){ return weight; } public void SetWeight(int newWeight){ if (newWeight > 0){ weight = newWeight; } } } public class TestDog { public static void main(String[] args) { Dog d = new Dog(); System.out.println("Dog d's weight is " + d.getWeight()); d.setWeight(42); System.out.println("Dog d's weight is " + d.getWeight()); d.setweight(-42); System.out.println("Dog d's weight is " + d.getWeight()); } } class dog is compiled but there is an error in class TestDog when compiled and the error is with dot notations. I want to kmow why there is error in testdog class when compiled.

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What about products that claim to detect malicious applets? : java security

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I run a web server. Am I at risk? : java security

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What is Serialization?

2 Answers   HCL,

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What is the java virtual machine (jvm)?

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