What is log4j in java?

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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.

3 Answers  

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Which is the Best institute to do academic Project in Java? Need information about institutes at Ameerpet, Hyderabad.

8 Answers  

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Explain different way of using thread?

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why java has the size of character 2 byte ,while in c/c++ it is of 1 byte?

8 Answers   IBS,

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What is stateless object in java?

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i heard that JVM internally contains pointers...is this true?

4 Answers   Wipro,

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How do I run a project in netbeans?

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What are the risks in java security? : java security

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What is explicit casting?

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Why sun introduce concept of anonymous class? What is need and real life use of anonymous class

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Is lambda cheaper than ec2?

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