What is the difference between jar and executable jar?

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What is the current code for the Java 5 code class Root { ?

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How long can a lambda function run?

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What is use of jpa?

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Is lambda expression an object?

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Is eclipse a jdk?

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how ahstraction is the property of oops,this is also in c and c++ ex. printf function which is also hide the unnecessary data,so what is the difference ? and does c++ fallow the abstraction?

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What is javacpl?

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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 is microservices java?

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What's a code group? : java security

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Why is lambda expression used?

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