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Now that, we have coded a class, we will now use it to create different Student objects. We do all of this in a test class. ... ect: 98Marks in second subject: 100Marks in second subject: 96 Next : Get and Set MethodsPrev : The constituents of a Class

An array is not just used to store elements but also access those stored values later on. We may also need to search for a p ... to learn about them, then refer to these pages on another site: Next : Array of objectsPrev : Processing arrays using loops

We have seen till now how exceptions thrown by methods we invoke such as nextInt() can be caught. We shall now see how we ou ... rintln(“Exception caught”);     }    }} The output of this program would be Exception caught Prev : Nested try catch blocks

A program may not always reach to its end. It might be interrupted in several ways. A logical error in your program could cr ... have entered invalid dataEnter an integer: 347You entered 347 Next : Exception hierarchyPrev : Abstract classes and methods

Variables and methods of the Student class which we have written can be accessed only after creating an object of that class ... es from a static method. The Test class shows how static methods can be accessed using both the class name and method name.

We have quite often been using the access specifiers- public and private. We shall now see what these access specifiers actu ... owed not allowed public allowed allowed allowed allowed < unspecified > allowed not allowed allowed not allowed

Increment and decrement operators are widely used in controlling loops. These operators provide a more convent and compact ... -2 ) % 40 + 0 – ( -2 % 4 )( 0 + 0 ) – 2( 0 – 2 )-2 Next : Overloading constructors and methodsPrev : Final variables

A method can receive a variable number of arguments with the use of ellipsis (three consecutive dots: …) In order to do so, ... ular method rather than the one taking variable number of arguments. Verify this fact yourself by modifying the code above.

A sub class has an ‘is a’ relationship with its superclass. This means that a sub class is a special kind of its super cl ... ble of type B. class A {     B obj; } Class B { } Next : Final classes and methods Prev : Inheritance introduction

We were able to create objects of the Student and initialise the variables of the object using the constructor. But after th ... (String n, int rn, int m1, int m2, int m3) { name = n;    setRollNumber(rn); setMarks1(m1); setMarks2(m2); setMarks3(m3); }

A class as already stated has three major components- variables, constructors and methods. A class may have all of these, ... : “+marks3);    } } Next : Creating objects and calling methods Prev : Introduction to object oriented programming

Before we look into what the terms call by value and call by reference mean, let us look at two simple programs and examine ... cond objectNumber c=b;// c also refers to the second objectboolean result1= a==b; // falseboolean result2= b==c; // true

We have already seen about mathematical calculations in Java. We will now recollect them and then look at a few other aspect ... yte varaibles. we cast num1 to double and perform the division in the following way. double result = (double) num1 / num2;

Here, we will discuss more about the data types we have seen in the previous article. Contents Storing integers Storing ... llowing shows an example. int a = 3; String str = “The value of a is ” + a; str now stores the String “The value of a is 3”

Java is an object oriented programming language. We write classes and build objects out of them. A class is a blueprint or a ... ever, here again “Hello World!” should be written on a single line. Strings in Java should begin and end on the same line.

It has already been said that a class is also a data type- a non primitive reference data type. This was very much implici ... . And then t1 is compared to t2. Run the program and see down the result. Next : Constants or literals Prev : Casting

When more than a single constructor is defined in a class, it is known as constructor overloading. Similarly, when more th ... and would generate a compilation error. Next : Static methods and variables Prev : Increment and decrement operators

Inheritance is surely one of the highly useful features in Java. But at times, it may be desired that a class should not be ... as final. The example cited above is just illustrative. The actual scenario in real world programming is much more complex.

Programs are often required to store information. For example, to write a program that adds two numbers, we need to store ... “+ firstNumber + ” and “+ secondNumber + ” is “+ result ); } } Next : More about data typesPrev : Hello World Program

As we have lardy said, there also exists the protected access specifier in addition to the public and private access specifi ... variables of class B are not accessible from class A. Similarly, protected variables of class A are not accessible from B.