Sawaal
  • Home/
  • Searching for he

 Searching for "he"

Q:

What is the use of super call?

Answer

By using super call we can call super class constructors  from sub class constructors and we can initialize super class private data.

Report Error

View answer Workspace Report Error Discuss

Subject: Java

Q:

What is the difference between path and classpath?

Answer

Path contains path of .exe files(commands).


Classpath contains path of packages. packages can be stored in folder or .jar files

Report Error

View answer Workspace Report Error Discuss

Subject: Java

Q:

What is JAR file? what are the main uses of JAR files?

Answer

JAR files are java's version of ZIP files. In fact, JAR uses the ZIP file format.


uses:


- to compress a number of . class files into one file


- to make a java executable JAR file.

Report Error

View answer Workspace Report Error Discuss

Subject: Java

Q:

In a class if private data member is declared then how to get value of that data member?

Answer

By using method.


The method used to get the data is called getter method.

Report Error

View answer Workspace Report Error Discuss

Subject: Java

Q:

In a class if private data member is declared then how to set data to that private data member?

Answer

By using method.


The method used to set the data is called setter method.

Report Error

View answer Workspace Report Error Discuss

Subject: Java

Q:

What is the differnce among public, protected and package access data?

Answer

If we are not using packages and if we are not using inheritance then there is no difference among public, protected and package access data.

Report Error

View answer Workspace Report Error Discuss

Subject: Java

Q:

When this. non-static datamember is compulsory inside non-static method

Answer

Whenever there is local- variable/parameter inside the method with same name as data member.


Ex:


Class Sample {


 int a;


  void show() {


   int a=5;


   system.out.println(a); // 5


   system.out.println(this.a);//23


  }


}


class MainApp {


  Public static void main(String[] args) {


  Sample s = new Sample();


   s.a = 23;


   s.show();


   }


}


 

Report Error

View answer Workspace Report Error Discuss

Subject: Java

Q:

What is stored in the 'this' reference?

Answer

This is a keyword and used as reference to Current object address in java. 


It means by using which object the method is called that object hashcode is stored inside the 'this'.

Report Error

View answer Workspace Report Error Discuss

Subject: Java
Job Role: Analyst